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| 1 | The effect of land use structure on the distribution of soil nutrients in the hilly area of the Loess Plateau,China显示文摘The irrational land use is one of the main reasons for the soil erosion and nutrient loss in the loess hilly area of China. In this project, 4 types of typical land use structure of sustain ment for about 15 years in the loess hill slope are selected to study the effect of land use structure on the distribution of soil nutrients. From hill bottom to hill top, the patterns of land use types are:, grassland-slope farmland-forest, slope farmland-grassland-forest, terrace-grassland-forest and slope farmland-forest-grassland. By measuring the contents of the total N, total P, available N, available P and organic matter of soils, the results show that the land use structure types of slope farmland-grassland-forest and terrace-grassland-forest have a better capacity to maintain the soil nutrients. | Bojie Fu Keming Ma Huafeng Zhou Liding Chen | 1999 | Chinese Science Bulletin1999，44，8： | 32 |
| 2 | Spatial variability of soil total nitrogen,phosphorus and potassium in Renshou County of Sichuan Basin,China显示文摘Understanding soil nutrient distributions and the factors affecting them are crucial for fertilizer management and environmental protection in vulnerable ecological regions.Based on 555 soil samples collected in 2012 in Renshou County,located in the purple soil hilly area of Sichuan Basin,China,the spatial variability of soil total nitrogen(TN),total phosphorus(TP)and total potassium(TK)was studied with geostatistical analysis and the relative roles of the affecting factors were quantified using regression analysis.The means of TN,TP and TK contents were 1.12,0.82 and 9.64 g kg^(–1),respectively.The coefficients of variation ranged from 30.56 to 38.75%and the nugget/sill ratios ranged from 0.45 to 0.61,indicating that the three soil nutrients had moderate variability and spatial dependence.Two distribution patterns were observed.TP and TK were associated with patterns of obvious spatial distribution trends while the spatial distribution of TN was characterized by higher variability.Soil group,land use type and topographic factors explained 26.5,35.6 and 8.4%of TN variability,respectively,with land use being the dominant factor.Parent material,soil group,land use type and topographic factors explained 17.5,10.7,12.0 and 5.0%of TP variability,respectively,and both parent material and land use type played important roles.Only parent material and soil type contributed to TK variability and could explain 25.1 and 13.7%of TK variability,respectively.More attention should focus on adopting reasonable land use types for the purposes of fertilizer management and consider the different roles of the affecting factors at the landscape scale in this purple soil hilly area. | GAO Xue-song XIAO Yi DENG Liang-ji LI Qi-quan WANG Chang-quan LI Bing DENG Ou-ping ZENG Min | 2019 | Journal of Integrative Agriculture2019，18，2： | 19 |
| 3 | 烤烟连作对重庆土壤养分状况的影响显示文摘通过田间取样和室内分析相结合的方法,调查研究了重庆市石柱、奉节和南川3个县烤烟连作土壤的养分状况。结果表明:烟田连作后土壤pH值下降,相邻茬次之间平均下降0.05,土壤酸化;有机质含量逐年下降,相邻茬次之间平均衰减0.56%g/kg;全氮、全磷、全钾含量随连作年限延长表现出不同程度的升高趋势,表现为P(6%~31%)>K(6%~21%)>N(2%~12%);速效磷、速效钾含量随连作年限延长逐年降低,且降低程度P(6%~24%)>K(2%~10%),速效氮含量略有上升;速效养分N/P、N/K和K/P比值明显增加,土壤养分比例失调。 | 苏海燕 程传策 马啸 罗晓庆 李常军 阳波 | 2010 | 河南农业科学2010，39，12： | 17 |
| 4 | Effects of maize-soybean relay intercropping on crop nutrient uptake and soil bacterial community显示文摘Maize-soybean relay intercropping is an effective approach to improve the crop yield and nutrient use efficiency,which is widely practiced by farmers in southwest of China.To elucidate the characteristics of different planting patterns on crop nutrient uptake,soil chemical properties,and soil bacteria community in maize-soybean relay intercropping systems,we conducted a field experiment in 2015–2016 with single factor treatments,including monoculture maize(MM),monoculture soybean(MS),maize-soybean relay intercropping(IMS),and fallow(CK).The results showed that the N uptake of maize grain increased in IMS compared with MM.Compared with MS,the yield and uptake of N,P,and K of soybean grain were increased by 25.5,24.4,9.6,and 22.4%in IMS,respectively,while the N and K uptakes in soybean straw were decreased in IMS.The soil total nitrogen,available phosphorus,and soil organic matter contents were significantly higher in IMS than those of the corresponding monocultures and CK.Moreover,the soil protease,soil urease,and soil nitrate reductase activities in IMS were higher than those of the corresponding monocultures and CK.The phyla Proteobacteria,Acidobacteria,Chloroflexi,and Actinobacteria dominated in all treatments.Shannon’s index in IMS was higher than that of the corresponding monocultures and CK.The phylum Proteobacteria proportion was positively correlated with maize soil organic matter and soybean soil total nitrogen content,respectively.These results indicated that the belowground interactions increased the crop nutrient(N and P)uptake and soil bacterial community diversity,both of which contributed to improved soil nutrient management for legume-cereal relay intercropping systems. | FU Zhi-dan ZHOU Li CHEN Ping DU Qing PANG Ting SONG Chun WANG Xiao-chun LIU Wei-guo YANG Wen-yu YONG Tai-wen | 2019 | Journal of Integrative Agriculture2019，18，9： | 17 |
| 5 | Effects of biochar-based fertilizers on nutrient leaching in a tobacco-planting soil显示文摘Biochar is a soil amendment for increasing soil quality and decreasing nutrient leaching. However, there is little information on the impact of biochar-based fertilizer(BF) on soil nutrient leaching in agricultural soils. We conducted a soil column leaching experiment to study the effects of BF on the leaching of total nitrogen(TN), total phosphorus, and total potassium(TK) in tobacco soils. The distribution characteristics of NH_4^+-N, available P, and available K in soil profiles were analyzed after the application of BF. Biochar was prepared by pyrolysis of fluecured tobacco stems. It was applied at four levels, 0%, 3%,9%, and 15%(w/w), respectively, to the compound fertilizer. Compared with the control, the leaching loss of soil TN decreased by 8.36%, 6.72%, and 6.45%, and the loss of soil TK decreased by 9.18%, 9.31% and 11.82% in the 3%,9%, and 15% BF treatments, respectively. However, BF had no significant effect on the P leaching due to the low movement of P in the soil profile. In addition, the BF addition increased the immobilization of NH_4^+-N, available P, and available K in the soil profile. These results indicate that addition of BF to a tobacco-planting soil reduced nutrient leaching, and suggest that BF could be an effective method of applying biochar to agriculture fields. | Yunlong Li Jianzhong Cheng Xinqing Lee Yi Chen Weichang Gao Wenjie Pan Yuan Tang | 2019 | Acta Geochimica2019，38，1： | 13 |
| 6 | Crop rotation-dependent yield responses to fertilization in winter oilseed rape(Brassica napus L.)显示文摘Differences in soil physical, chemical and biological properties between paddy–upland and continuous upland rotations will influence nutrient relations and crop growth. With the aim of estimating rapeseed yield performance in response to fertilization in rice–rapeseed(RR) and cotton–rapeseed(CR) rotations, on-farm experiments were conducted at 70 sites across Hubei province, central China. The economically optimal fertilizer rates of winter oilseed rape in different rotations were determined. Field experiments showed that previous crops significantly influenced seed yields. Without N fertilization,seed yields were significantly lower for the RR rotation than for the CR rotation. The average yield increase ratio and agronomic efficiency associated with nitrogen(N)fertilization in the RR rotation were 96.6% and 6.56 kg kg- 1, significantly higher than those in the CR rotation. No seed yield differences were detected between the two rotations under phosphorus(P) and potassium(K) fertilization. In contrast to the CR rotation, N fertilizer played a more vital role in maintaining high seed yields in the RR rotation owing to the lower indigenous soil N supply. Compared with local N fertilizer recommendation rates for the RR rotation, on average an additional 18 kg N ha- 1was recommended according to the economically optimal N fertilizer rate(EONFR). In contrast, the EONFR was 14 kg N ha- 1lower than the locally recommended N fertilizer rate for the CR rotation. There were no differences between the two rotations for the average economically optimal P and K fertilization rates. Consequently, the average EONFR of winter oilseed rape could be reduced if cotton rather than rice preceded the winter oilseed rape. | Tao Ren Hui Li Jianwei Lu Rongyan Bu Xiaokun Li Rihuan Cong Mingxing Lu | 2015 | The Crop Journal2015，3，5： | 8 |
| 7 | Benefits of Biochars and NPK Fertilizers for Soil Quality and Growth of Cowpea (Vigna unguiculata L. Walp.) in an Acid Arenosol显示文摘Fertilization is required for optimum plant growth, particularly in unfertile soils, while optimizing nutrient use effciency is an alternative to reduce inorganic fertilizer needs and reduce environmental problems caused by nutrient leaching. This study investigated soil properties and cowpea yield responses to biochars(BCs) made from different feedstocks, baby corn peel biochar(BC1), branches of mango tree biochar(BC2), and rice husk biochar(BC3), applied in combination with nitrogen-phosphorus-potassium(NPK) fertilizers.The experiment was conducted in a greenhouse, using an acid sandy soil(Arenosol) that was submitted for 70 d to the following eight treatments: i) control;ii) full dose of NPK(a commercial compound fertilizer(12-24-12 of N-P2O5-K2O)+ urea(46% N));iii) BC1+ half dose of NPK;iv) BC1 + full dose of NPK;v) BC2 + half dose of NPK;vi) BC2 + full dose of NPK;vii) BC3 + half dose of NPK;and viii) BC3 + full dose of NPK. All biochars were applied at a rate of 0.9%(weight/weight), and each type of biochar was combined with half and full doses of NPK fertilizers. Soil pH increased significantly(P < 0.05) in treatments with BC1 and BC2,while cation exchange capacity(CEC) and available P were higher in the treatments with BC1;BC1 and BC2 also induced higher activity of enzymes related to the P cycle and higher cowpea yield. Similar soil properties and cowpea yield parameters were obtained with the full and half doses of NPK fertilizers for each type of biochar used. In conclusion, biochars in the combination with NPK fertilizers improved soil chemistry and enzymatic activities, allowing reduced fertilizer application and food production costs in the acid soil studied. | Rogerio Borguete Alves RAFAEL Maria Luisa FERNANDEZ-MARCOS Stefania COCCO Maria Letizia RUELLO Flavio FORNASIER Giuseppe CORTI | 2019 | Pedosphere2019，29，3： | 6 |
| 8 | 豫北平原粮田土壤养分状况研究显示文摘选取豫北平原粮食主产县代表性地块,对耕层土壤养分进行测定分析,调查玉米产量、农业生产状况和农民施肥习惯,旨在查明豫北平原土壤养分状况,为合理利用土壤资源和指导科学施肥提供依据。结果表明:豫北平原土壤养分状况整体处于中等偏上水平,土壤有机质、土壤全氮、速效氮、速效磷和速效钾平均含量分别为15.54 g/kg、1.04 g/kg、63.80 mg/kg、20.72 mg/kg和101.93 mg/kg。与第二次土壤普查结果相比土壤有机质提高了38.75%,土壤速效磷含量提高了55.79%,而土壤速效钾含量下降了40.63%。应重视施用有机肥和推广秸秆还田,注意减磷补钾平衡施用化肥,重视宣传推广作物专用复合肥和新型缓/控释肥的施用,不断提高土壤肥力水平和作物产量。 | 杨素勤 王文亮 何冠华 任丽 | 2010 | 江西农业学报2010，22，12： | 5 |
| 9 | 化肥减量条件下不同施用方法对土壤养分有效性及水稻产量的影响显示文摘大田试验条件下,采用裂区试验研究了翻压紫云英后化肥减量施用条件下不同施肥方法对土壤养分有效性及水稻产量的影响。结果表明:翻压紫云英22500kg/hm2后,配施80%化肥,底肥:分蘖肥:穗肥=5:5:0,与习惯施肥方法相比,早稻和晚稻收获后土壤中有效氮分别平均增加5.6%和9.8%;而底肥:分蘖肥:穗肥=3:4:3更有利于提高有效K含量,分别平均增加8.9%和13.2%;配施60%化肥,按底肥:分蘖肥:穗肥=5:5:0施肥显著增加早稻收获后土壤中有效K含量,增幅为27.1%;肥料全部用作分蘖肥时降低晚稻或早稻收获后土壤有效N、K含量;配施60%~80%化肥,早稻和晚稻产量均以施肥方法底肥:分蘖肥:穗肥=0:7:3最佳。 | 谢志坚 徐昌旭 许政良 李水荣 苏全平 秦文婧 | 2010 | 江西农业学报2010，22，10： | 5 |
| 10 | Responses of plant community to the linkages in plant-soil C:N:P stoichiometry during secondary succession of abandoned farmlands,China显示文摘Succession is one of the central themes of ecology;however,the relationship between aboveground plant communities and underground soils during secondary succession remains unclear.In this study,we investigated the composition of plant community,plant-soil C:N:P stoichiometry and their relationships during secondary succession after the abandonment of farmlands for 0,10,20,30,40 and 50 a in China,2016.Results showed that the composition of plant communities was most diverse in the farmlands after secondary succession for 20 and 50 a.Soil organic carbon and total nitrogen contents slightly decreased after secondary succession for 30 a,but both were significantly higher than those of control farmland(31.21%-139.10%and 24.24%-121.21%,respectively).Moreover,C:N ratios of soil and microbe greatly contributed to the changes in plant community composition during secondary succession of abandoned farmlands,explaining 35.70%of the total variation.Particularly,soil C:N ratio was significantly and positively related with the Shannon-Wiener index.This study provides the evidence of synchronous evolution between plant community and soil during secondary succession and C:N ratio is an important linkage between them. | LIU Weichao FU Shuyue YAN Shengji REN Chengjie WU Shaojun DENG Jian LI Boyong HAN Xinhui YANG Gaihe | 2020 | Journal of Arid Land2020，12，2： | 5 |
| 11 | 模拟酸雨对水稻生长与水稻土养分的影响显示文摘采用温室盆栽水稻喷淋模拟酸雨实验,研究不同pH值(2.5,3.5,4.5,>5.6)的酸雨对水稻生长和水稻土养分的影响。结果表明:在酸雨的影响下,除喷淋pH 4.5酸雨外,其余酸雨处理的土壤有机质均下降了9.1%~16.7%;不同浓度的酸雨对土壤碱解氮的影响不大,但速效钾在喷淋酸雨后相对基础土样下降了33.9%左右;土壤速效磷含量相对基础土样提高了21.3%~40.5%;土壤有效硫的含量随着酸雨pH的降低而升高;喷淋酸雨后土壤中的交换性钙、镁相对基础土样分别上升了27.6%~36.3%和3%~21%。酸雨对水稻茎叶氮的吸收影响不大,但水稻稻粒中全氮的含量会随着酸雨pH的降低而升高;酸雨不利于水稻茎叶对养分磷的吸收,但pH 2.5的酸雨会促进稻粒对磷的吸收;酸雨有利于水稻茎叶对养分钾的吸收,但不利于稻粒对养分钾的吸收;水稻茎叶和稻粒中全硫的含量会随着酸雨pH的降低而升高。水稻在pH 2.5的酸雨影响下显著减产,喷淋了pH 3.5酸雨的水稻其千粒重、结实率和实粒数都是最高的,表明pH 3.5的酸雨对水稻产量的提高有一定的刺激作用。 | 唐先干 李祖章 | 2010 | 江西农业学报2010，22，8： | 3 |
| 12 | Evaluation of soil pollution situation in urban industrial wasteland:A case study显示文摘Urban industrial wasteland might have been affected by toxic and hazardous substances emitted by the original production activities. Consequently, pollution survey analysis and environmental risk assessment should have been conducted before redevelopment. In the paper, by surveying soil sample from waste dump, tailing pond and surrounding area in Lead-Zinc Mine, fuzzy mathematics method was adopted to establish Fuzzy Comprehensive Evaluation model as to analyze conditions of soil pollution by heavy metal and soil nutrient. It would provide important scientific basis for pollution control and ecological restoration in the mining area and thus carry out comprehensive ecological restoration in Lead-Zinc Mine. Fuzzy Comprehensive Evaluation results indicated that soil pollution by heavy metal were severe. It could give priority to develop forestry. Most deficient soil nutrient elements were available P and N. Due to the lack of nitrogen and phosphorus, it was necessary to improve the soil before phytoremediation. | SHI Ping GUO Shuang FU Yan-hua | 2015 | Ecological Economy2015，8，2： | 2 |
| 13 | THE EFFECT OF LAND USE CHANGES ON SOIL CONDITIONS IN ARID REGION显示文摘Land use change may influence a variety of natural and ecological processes, including soil nutrient, soil moisture, soil erosion, land productivity and biodiversity. In this paper, 9 typical land use patterns sustainable 15- 20 years have been chosen to study the effect of different land use patterns on soil nutrient, soil erosion, soil moisture, saline and so on. We drew conclusions as follows: Firstly, it is clear of the effect of land use change on soil. Land use change results in the decline of soil nutrient and erosion rate, but the increase of land productivity; secondly, the erosion rate and the rate of vegetation cover is the subtractive correlativity. It reflects the effect of soil erosion on land productivity. It is clear of the positive correlativity between land productivity and soil moisture and explains the role of land surface vegetation to preventing aridity in the northwestern China; lastly, it is feasible to develop animal husbandry properly in arid region. The topgallant land use pattern is the combination of forest and meadow in arid region. The rational land use may prevent or weaken the intensity of soil erosion in a certain extent. Therefore, activities accorded with ecological principal such as readjustment of land use structure, rational reclamation along with adoption of prevention and control measures can reverse land degradation process. | Fu Chen Bu-zhuo Peng | 2000 | Chinese Geographical Science2000，10，3： | 2 |
| 14 | Characteristics and nutrient diagnosis of vegetable soils in Tianjin显示文摘This paper reports the diagnosis studies of soil nutrient status and deficiency of 12nutrients elements by using the systematic approach of soil nutrient status.The characteristicsof vegetable soils,the nutrient balance of different vegetable soils and the limiting factors andtheir extent to reducing yield in developing and developed vegetable soils were studied.And thebalance fertilization for further yield-increasing and quality improving was recommended. | 周艺敏 朱静华 景海春 兰耀龙 | 1993 | 华北农学报1993，8，S2： | 2 |
| 15 | Quality and Crop Yield Potential of Moderately Degraded Alfisols Under Different Nutrient Inputs and Cropping Patterns显示文摘Crop performance on degraded soil needs special management practices to overcome soil quality limitations. In a 2-year(from summer 2006 to winter 2007–2008) field trial on a moderately degraded Alfisol in Swabi District(34°7′12′′N, 72°28′20′′E), Pakistan,the effects of three cropping patterns, cereal-cereal(CC), cereal-legume(CL), and cereal-cereal and legume intercrop(CLI), were tested in main plots under four fertilization treatments in sub-plots, including no fertilization(control), farmers' practice(FP, 60:45 kg ha^(-1) N:P_2O_5), recommended dose(RD, 120:90:60 kg ha^(-1) N:P_2O_5:K_2O), and integrated nutrient management(INM, 20 t ha^(-1) farmyard manure integrated with 50% N, 100% P, and K of recommended dose), using a split-plot randomized complete block design. The performance of CL was superior than CC in plant height, leaf area index(LAI), cob length, grain yield, biological yield, and grain protein(8%, 26%, 8%, 5%, 10%, and 8% increases, respectively), while CLI confirmed significant improvement only in LAI(25%) over CC. Response to nutrient inputs from all sources was in the order of INM > RD > FP > control, and the maximum net economic return by INM(23% and 2.5 times higher than RD and FP, respectively) indicated severe deficiency of both macro-and micro-nutrients in the soil as well as degraded physical properties. Increases in soil organic matter, total N, total mineral N, available P and K, total porosity, and available water-holding capacity by 6%, 34%, 24%, 50%, 13%, 5%, and 7%, respectively, and decrease in soil bulk density by 4% after four crop seasons indicated optimistic changes in soil quality as a result of the combined effects of fertilization from organic and inorganic sources and legumes within crop rotation. This study suggests that keeping the soil covered under cereal-legume rotation crops all year round and treatment with INM(50% N from organic source and 50% from inorganic source) are the best management practice for sustained production on degraded Alfisols. | Wiqar AHMAD Farmanullah KHAN Zahir SHAH Muhammad Jamal KHAN | 2019 | Pedosphere2019，29，2： | 2 |
| 16 | Assessment of the Effect of Hydrolysed Starch Graft Copolymers Application on Soil Nutrient (Phosphorus and Nitrogen) Retention显示文摘The effects of the application of the graft copolymers (Hydrolyzed starch-g-polyacrylonitrile (HSPAN) and Hydrolyzed starch-g-polyacrylic acid (HSPAA)) on the nitrogen (N) and phosphorus (P) retention capacity of soil was evaluated in this study. Soil nutrient (N and P) retention capacity tests was carried out at three graft copolymers application rates (3.0, 6.0, and 9.0g/kg soil) against a blank soil sample to which graft copolymers was not applied. Diammonium phosphate (DAP) at 0, 100, and 200mg in aqueous solution/kg soil were applied in triplicates. The soil samples were mixed thoroughly and allowed to air-dry. The residual N and P contents of the soil samples were determined and reported as the amounts of nutrients retained as a function of the graft copolymer and DAP application rates. The result of this study has clearly demonstrated the potential of the graft copolymers to alleviate problems related to nutrient loss from the soil media. Leaching of nutrients (N and P) in soil has been found to be reduced to minimal (0.46%N, and 1.13%P) with the application of hydrolyzed graft copolymer and the nutrients are thus available to plant for growth by suction pressure difference. | Lawrence O.Ekebafe David E.Ogbeifun Felix E.Okieimen Osazoduwa M.Ekebafe | 2018 | Materials Science(Materials Review)2018，2，1： | 1 |
| 17 | Recycling organic waste in managed tropical forest ecosystems:effects of arboreal litter types on soil chemical properties in Abeokuta, southwestern Nigeria显示文摘The aim of this study is to determine the influence of tree litters on soil nutrients in a managed forest in southwestern Nigeria.Mono species tree clusters consisted of indigenous species:Gmelina arborea,Tectona grandis,Leucaena leucocephala,Bambusa vulgaris,Treculia africana,Anogeissus leiocarpus were selected and analyzed for their litter and soil chemical properties at 0–5 and 15–30 cm.T.africana and T.grandis litters have the highest nutrients,while L.leucocephala and A.leiocarpus are the lowest.Soils under G.arborea,T.africana,and A.leiocarpus are more acidic due to lower calcium and magnesium contents but have higher manganese and sulphur levels.Tree litters improved soil nitrogen,phosphorous,and micro-nutrients but depleted potassium.Litter lignin and carbon appeared to hinder the release of some nutrients.Nitrogen,potassium and copper are concentrated in the topsoil while others nutrients are not differentiated with soil depth.There is a positive correlation between litter chemistry and soil chemical properties.It was concluded that tree litter chemistry differs according to species but determines soil reaction and nutrient content.The magnitude of the effect on soil properties is related to the quality of the organic litters. | J.O.Azeez | 2019 | Journal of Forestry Research2019，30，5： | 1 |
| 18 | Inversion tillage with straw incorporation affects the patterns of soil microbial co-occurrence and multi-nutrient cycling in a Hapli-Udic Cambisol显示文摘Inversion tillage with straw amendment is widely applied in northeastern China, and it can substantially increase the storage of carbon and improve multiple subsoil functions. Soil microorganisms are believed to be the key to this process,but research into their role in subsoil amelioration is limited. Therefore, a field experiment was conducted in 2018 in a region in northeastern China with Hapli-Udic Cambisol using four treatments: conventional tillage(CT, tillage to a depth of 15 cm with no straw incorporation), straw incorporation with conventional tillage(SCT, tillage to a depth of 15 cm),inversion tillage(IT, tillage to a depth of 35 cm) and straw incorporation with inversion tillage(SIT, tillage to a depth of 35 cm). The soils were managed by inversion to a depth of 15 or 35 cm every year after harvest. The results indicated that SIT improved soil multi-nutrient cycling variables and increased the availability of key nutrients such as soil organic carbon, total nitrogen, available nitrogen, available phosphorus and available potassium in both the topsoil and subsoil.In contrast to CT and SCT, SIT created a looser microbial network structure but with highly centralized clusters by reducing the topological properties of average connectivity and node number, and by increasing the average path length and the modularity. A Random Forest analysis found that the average path length and the clustering coefficient were the main determinants of soil multi-nutrient cycling. These findings suggested that SIT can be an effective option for improving soil multi-nutrient cycling and the structure of microbial networks, and they provide crucial information about the microbial strategies that drive the decomposition of straw in Hapli-Udic Cambisol. | CHEN Xu HAN Xiao-zeng WANG Xiao-hui GUO Zhen-xi YAN Jun LU Xin-chun ZOU Wen-xiu | 2023 | Journal of Integrative Agriculture2023，22，5： | 1 |
| 19 | Effects of soil nitrogen:phosphorus ratio on growth rate of Artemisia ordosica seedlings显示文摘To address how the ratios of nitrogen and phosphorus (N:P ratios) in soil affect plant growth, we performed a two-factor (soil available N:P ratios and plant density) randomized block pot experiment to examine the relationships between soil N:P ratios, and the N:P ratios and growth rate of Artemisia ordosica seedlings. Under moderate water stress and adequate nutrient status, both soil N:P and plant density influenced the N:P ratios and growth rates of A. ordosica. With the increase of soil N:P ratios, the growth rates of A. ordosica seedlings decreased significantly. With the increase of soil N:P ratios, N:P ratios in A. ordosica seedlings increased significantly. While the nitrogen concentrations in the plant increased slightly, the phosphorus concentrations significantly decreased. With the increase of plant density, the shoot N:P ratios and growth rates significantly decreased, which resulted from soil N:P ratios. Thus, soil N:P ratios influenced the N:P ratios in A. ordosica seedlings, and hence, influenced its growth. Our results suggest that, under adequate nutrient environment, soil N:P ratios can be a limiting factor for plant growth. | Wei Wu XingDong He HuaCong Ci Rong Li PingPing Xue YuBao Gao HaLin Zhao | 2010 | Research in Cold and Arid Regions2010，2，4： | 1 |
| 20 | Root Exudation of Organic Acids of Herbaceous Pioneer Plants and Their Growth in Sterile and Non-Sterile Nutrient-Poor,Sandy Soils from Post-Mining Sites显示文摘Nutrient-poor, sandy soils form the prevailing substrate at post-mining sites of the Lusatian region(Brandenburg, Germany) and present a challenge for vegetation development. We studied the organic acid quantity and composition of three commonly occurring pioneer plant species, the legumes Lotus corniculatus L. and Trifolium arvense L. and the grass Calamagrostis epigeios(L.) Roth, to determine if plant growth and exudation differed with(non-sterilized soil) and without(sterilized soil) an indigenous soil microbial community. We investigated whether organic acids were found in the rhizosphere and surrounding soil and whether this influenced nutrient mobilization. This study consists of linked field investigations and a greenhouse experiment. Plants were grown in the greenhouse in either sterilized or non-sterilized sandy soil from a reclamation site in the Lusatian mining landscape(Welzow Su¨d, East Germany). After seven months, the plant biomass, root morphology, organic acids, and water-soluble nutrients and root colonization with arbuscular mycorrhizal fungi(AMF) and dark septate endophytes(DSE) were analyzed. Roots of all three plants in the field and greenhouse experiments were highly colonized with AMF. Calamagrostis epigeios and T. arvense had a significantly higher colonization frequency with DSE than L. corniculatus. The quantity and composition of organic acids strongly differed among plant species, with the highest number of organic acids found for L. corniculatus and lowest for C. epigeios. The quantity of organic acids was greatly reduced in all plants under sterilized soil conditions. However, the composition of organic acids and plant growth in sterilized soil were reduced for both legumes, but not for C. epigeios, which had a higher biomass under sterilized conditions. Changes in nutrient concentrations in the field rhizosphere soil relative to those in the control were measurable after seven months. While the spectrum of organic acids and the growth of legumes seemed to be dependent on a highly diverse soil microbial community and a symbiotic partner, the grass C. epigeios appeared capable of mobilizing enough nutrients without an indigenous microbial community, and might be more competitive on sites where soil microbial diversity and activity are low. | Katja BOLDT-BURISCH Bernd Uwe SCHNEIDER M.Anne NAETH Reinhard F.HTTL | 2019 | Pedosphere2019，29，1： | 1 |
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