|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | SOIL AGGREGATE AND ITS RESPONSE TO LAND MANAGEMENT PRACTICES显示文摘This paper provides a broad review of the existing study on soil aggregate and its responses to land management practices. Soil aggregate is used for structural unit, which is a group of primary soil particles that cohere to each other more strongly than other surrounding particles. The mechanism of soil particle aggregation may be expressed by a hierarchical model, which is based upon the hypothesis that macroaggregates (>250 μm) are collections of smaller microaggregates (<250 μm) held together with organic binding agents. Primary particles form microaggregates and then macroaggregates. Carbon (C)-rich young plant residues form and stabilize macroaggregates, whereas old organic C is occluded in the microaggregates. The interaction of aggregate dynamics with soil organic carbon (SOC) is complex and embraces a range of spatial and temporal processes within macroaggregates and microaggregates. The nature and properties of aggregates are determined by the quantity and quality of coarse residues and humic compounds and by the degree of their interaction with soil particles. The mechanisms resulting in the binding of primary soil particles into stable aggregates vary with soil parent material, climate, vegetation, and land management practices. Land management prac- tices, including tillage methods, residue management, amendments, and soil fertility management, enhance soil aggre- gation. However, there is still much uncertainty in the dynamics of organic matter in macroaggregation and microaggre- gation, and research is still needed to understand further the mechanisms of aggregate formation and its responses to human activities. | Chaofu Wei Ming Gao Jingan Shao Deti Xie Genxing Pan | 2006 | China Particuology2006，4，5： | 17 |
| 2 | Land use change and its corresponding ecological responses:a review显示文摘This paper reviews the research on land use change and its corresponding ecological responses. Patterns of land use changes in spatio-temporal level are produced by the interaction of biophysical and socio-economic processes. Nowadays, the studies derived from different socioeconomic conditions and scales show that at short-term scale, human activities, rather than natural forces, have become a major force in shaping the environment, while biophysical factors control the trends and processes of land use change under the macro environmental background. Providing a scientific understanding of the process of land use change, the impacts of different land use decisions, and the ways that decisions are affected by a changing environment and increasing ecological variability are the priority areas for research: (1) explanation of scale dependency of drivers of land use change; (2) quantification of driving factors of land use change; (3) incorporation of biophysical feedbacks in land use change models; and (4) underlying processes and mechanisms of ecological impacts of land use change. | SHAO Jingan NI Jiupai WEI Chaofu XIE Deti | 2005 | Journal of Geographical Sciences2005，15，3： | 17 |
| 3 | Mountain Land Use Planning of Metropolitan Suburbs:the Case of the Jinyun Mountain and Its Surrounding area,Chongqing,China显示文摘Open space of metropolitan suburbs in mountain region,has been increasingly becoming the coupling mosaic structure of industrial actions and landscape behaviors. However,the local governments,when making land use planning,often aim at economic development,and rarely refer to the coordination of compatibilities and conflicts between industrial actions and landscape behaviors in the mosaic structure. In this study land use in the Jinyun Mountain and its surrounding area,Chongqing is adjusted by gray multi-objective programming approach and local-level decision-making process to cope with conflicts between objectives for human welfare and objectives for landscape conservation. The results indicate that: 1) the compatibilities and conflicts among different behavior characters and different landscape types result in the compatibilities of landscape to human behavior;2) a land use planning in the study area is produced based on the sustainable land use and social-eco development,which pays more attention to the resources and environment constraints and economic objectives,and follows the distribution law of rare resources;3) in the study area,cultivated land of 1,207.27 ha can meet the demands for food and byproducts by the residents there,orchard land and forestland of 632.55 ha,2,276.61 ha,respectively can provide enough space for the local people to improve their living structure and meet their demands for recreational activities,and urban residential land,rural residential land,mining land and transportation land of 1,107.60 ha,120.27 ha,162.48 ha,100.91 ha,respectively can satisfy the resident’s economic development and infrastructures;4) the equilibrium among industrial actions,landscape accessibility and ecological conservation can be obtained by analyzing the possible impacts of human activities on landscape ecological process in open space of metropolitan suburbs in mountain areas. | SHAO Jingan WEI Chaofu XIE Deti | 2005 | Journal of Mountain Science2005，2，2： | 14 |
| 4 | Classification and Gradation of Cultivated Land Quality in Bishan County of Chongqing, China显示文摘The conflicts among food security, economic development and ecological protection are the “sticking point” of undeveloped southwestern mountainous areas of China. The objectives of this study are to identify appropriate inte- grated indicators influencing the classification and gradation of cultivated land quality in the southwestern mountainous area of China based on semi-structure interview, and to promote the monitoring of cultivated land quality in this region. Taking Bishan County of Chongqing as a study case, the integrated indicators involve the productivity, protection, ac- ceptability, and stability of cultivated land. The integrated indicators accord with the characteristics of land resources and human preference in southwestern mountainous area of China. In different agricultural zones, we emphasize different indicators, such as emphasizing productivity, stabilization and acceptability in low hilly and plain agricultural integrative zone (LHP-AIZ), protection, productivity and stability in low mountain and hill agro-forestry ecological zone (LMH-AEZ), and acceptability in plain outskirts integrative agricultural zone (PO-IAZ), respectively. The pronounced difference of classification and gradation of cultivated land, regardless of inter-region or intra-region, is observed, with the reducible rank from PO-IAZ, LHP-AIZ to LMH-AEZ. Research results accord with the characteristics of assets management and intensive utilization of cultivated land resources in the southwestern mountainous area of China. Semi-structure interview adequately presents the principal agent of farmers in agricultural land use and rural land market. This method is very effective and feasible to obtain data of the quality of cultivated land in the southwestern mountainous area of China. | SHAO Jing'an GE Xiaofeng WEI Chaofu XIE Deti | 2007 | Chinese Geographical Science2007，17，1： | 10 |
| 5 | Effects of land use patterns on soil aggregate stability in Sichuan Basin,China显示文摘Soil aggregate stability as a key indicator of soil structure,is a product of interactions between soil environment,management practices,and land use patterns.The objective of this study was to analyze the impact of various land use patterns on soil aggregate stability in Sichuan Basin of southwestern China.The dry-and water-stable aggregate size distributions were determined by manual dry sieving procedure and Yoder's wet sieving procedure,respectively,while microaggregates and its mechanical and chemical stabilities by Kachisky's method,oscillator method,and citrate-dithionate(C-D) reagent method,separately.The results indicated that fractal dimension and surface fractal dimension were useful indicators to reflect soil aggregate distribution.Land use patterns have an obvious influence on soil aggregate stability.In the study area,water stability,mechanical stability,and chemical stability followed the sequence,Barren land > forestland > orchard > cropland,and the original stability and collapse velocity were sensitive to soil properties and soil structure.The difference of aggregate stability under different land use patterns is mainly due to the intensity of human disturbance and cultivation.Improper land use patterns will lead to breakdown of unstable aggregates,producing finer and more-easily transportable particles and microaggregates.In the future,inappropriate cultivation and land use patterns should be changed to protect soil structure,to improve soil aggregate stability and soil fertility in Sichuan Basin. | Zhen Zhang Chaofu Wei Deti Xie Ming Gao Xibai Zeng | 2008 | Particuology2008，6，3： | 9 |
| 6 | Effects of Land Management Practices on Labile Organic Carbon Fractions in Rice Cultivation显示文摘A research trial with four land management practices, i.e., traditional tillage-fallow (TTF), traditional tillage-wheat (TTW), conservation tillage-fallow (CTF) and conservation tillage-wheat (CTW), was sampled in the 15th year after its establishment to assess the effects of different management practices on labile organic carbon fractions (LOCFs), such as easily oxidizable organic carbon (EOC), dissolved organic carbon (DOC), particulate organic carbon (POC) and microbial biomass carbon (MBC) in a typical paddy soil, Chongqing, Southwest China. The results indicated that LOCFs were significantly influenced by the combination of no-tillage, ridge culture and crop rotation. And, different combination patterns showed different effectiveness on soil LOCFs. The effects of no-tillage, ridge culture and wheat cultivation on EOC, DOC, POC and MBC mainly happened at 0-10cm. At this depth, soil under CTW had higher EOC, DOC, POC and MBC contents, compared to TTF, TTW and CTF, respectively. Moreover, the contents of LOCFs for different practices generally decreased when the soil depth increased. Our findings suggest that the paddy soil in Southwest China could be managed to concentrate greater quantities of EOC, DOC, POC and MBC. | SHAO Jing'an LI Yangbing WEI Chaofu XIE Deti | 2009 | Chinese Geographical Science2009，19，3： | 8 |
| 7 | Integrated Indicators-based Gradation of Cultivated Land Quality in Mountainous Region of Southwestern China显示文摘 | SHAO Jing'an WEI Chaofu XIE Deti ZHOU Yan | 2006 | Journal of Mountain Science2006，3，3： | 4 |
| 8 | Farmers' responses to land transfer under the household responsibility system in Chongqing (China): a case study显示文摘 | Shao Jing' an Wei Chaofu Xie Deft | 2007 | Journal of Land Use Science2007，2，2： | 1 |
| 9 | Farmers responses to land transfer under the household responsibility system in Chongqing(China) :A case study显示文摘 | Shao Jingan Wei Chaofu Xie Deti | 2007 | Journal of Land Use Science2007，2，2： | 1 |
| 10 | TURBULENT STRUCTURE AND LOCAL SIMILARITY IN THE TOWER LAYER OVER THE NANJING AREA显示文摘 | XU YUMAO ZHOU CHAOFU LI ZHONGKAI ZHANG WEI | 1997 | Boundary - Layer Meteorology1997，，1： | 1 |
| 11 | Irrigation water requirements of rice using Cropwat model in Northern Benin显示文摘Understanding crop water requirements(CWR)in semi-arid region is essential for better irrigation practices,scheduling and efficient use of water since the water supply through rainfall is limited.This paper estimated the crop reference and actual evapotranspiration(Eto and ETc)respectively and the irrigation water requirement of rice(Oryza sativa L.)in Benin’s sub-basin of Niger River(BSBNR)of west Africa,using CROPWAT model.The long recorded climatic data,crop and soil data from 1942 to 2012 were computed with the Cropwat model which is based on the United Nations’Food and Agriculture Organization(FAO)paper number 56(FAO56).The Penman-Monteith method was used to estimate ETo.Crop coefficients(Kc)from the phenomenological stages of rice were applied to adjust and estimate the actual evapotranspiration ETc through a water balance of the irrigation water requirements(IR).The results showed the BSBNR annual reference evapotranspiration(ETo)was estimated at 1967 mm.The lowest monthly value of ETo of 123 mm,was observed in August month,middle of the rainy season while the highest value 210 mm was observed in March within dry season.The crop evapotranspiration ETc and the crop irrigation requirements were estimated at 651 mm and 383 mm,respectively in rainy season and 920 mm and 1148 mm,respectively within a dry season.Irrigation projects of these seasons can then be scheduled for water use efficiency based on these findings. | Abdel-Kabirou Bouraima Zhang Weihua Wei Chaofu | 2015 | International Journal of Agricultural and Biological Engineering2015，8，2： | 1 |
| 12 | Anthropic pedogenesis of purple rock fragments in Sichuan Basin, China显示文摘 | WEI Chaofu NI Jiupai GAO Ming | 2006 | Catena2006，68，： | 1 |
| 13 | A study on the characteristics of heavy metals in orange ecosystem显示文摘An investigation was conducted to identify the characteristics of heavy metals in orange ecosystem in three areas in the Three Gorge Reservoir Region by using the modified Tessier sequential extraction procedure.The contents of Cu and Pb in different speciation fractions of the soils can be ordered as the Residual(F6)>Reducible(F4)>Oxidable(F5)>Water soluble(F1)>Carbonate(F3)>Exchangeable(F2),and the contents of Zn and Ni follow the order of the Residual(F6)>Oxidable(F5)>Reducible(F4)>Water soluble(F1)>Carbonate(F3)> Exchangeable(F2),and those of Cd follow the order of the Reducible(F4)>Oxidable(F5)>Exchangeable(F2)> Carbonate(F3)>Residual(F6)>Water soluble(F1).The concentrations of Cu in the different organs of oranges follow the increasing sequence of pulp>leaf>pericarp,those of Zn and Ni following the increasing sequence of leaf >pulp>pericarp,and those of Pb and Cd follow the increasing sequence of leaf>pericarp>pulp.Correlation degrees of different forms of same heavy metals in soils are according to the order of Cu>Zn>Cd>Pb>Ni.Correlation degrees of different heavy metals in same forms are according to the order that the forms of Reducible(F4),Oxidable(F5) and Residual(F6) are higher than the forms of Water soluble(F1),Exchangeable(F2) and Carbonate(F3).There are either positive or negative correlations between heavy metals in leaves and in pulp,while there are all positive correlations between heavy mentals in leaves and in pericarp.There are significant correlations between the concentrations of some heavy metals in leaves,pericarp or pulp,and those in speciation fractions in the soils. | LI Qilin WEI Chaofu HUANG Yun WANG Liwei WANG Dingyong | 2010 | Chinese Journal Of Geochemistry2010，29，1： | 1 |
| 14 | TURBULENT STRUCTURE AND LOCAL SIMILARITY IN THE TOWER LAYER OVER THE NANJING AREA显示文摘 | XU YUMAO ZHOU CHAOFU LI ZHONGKAI ZHANG WEI | 1997 | Boundary - Layer Meteorology1997，，1： | 1 |
| 15 | Temporal variation of soil water and its influencing factors in hilly area of Chongqing,China显示文摘The paper studied the temporal variation of soil water content and its influencing factors in hilly area of Chongqing by the yearly data of 2006 and 2007.According to precipitation anomaly percentage,the year 2006 was a dry year and 2007 a normal year.In the dry year 2006,the variations of soil moisture in all three layers(0-10 cm,10-20 cm,20-40 cm)were medium(10%30%),and those of the two deeper layers were weak(CV<10%).Hence,the seasonal variation of soil moisture in the humid area was large in the dry year and small in the wet year.The probability distributions of soil moisture in all three layers in both dry and normal years showed single-peak shapes.However,peak locations and values varied with different layers and years.Among factors affecting the temporal variation of soil moisture in the 0-10 cm layer,during March to May,the meteorological factors including temperature,sunshine and precipitation were all inversely correlated with soil water content variation.The correlations with average temperature and accumulated temperature were both highly significant P<0.01(P=0.00).The inverse correlations with sunshine and precipitation were significant P<0.05(P=0.01).Among soil physical properties,except for bulk density which was inversely correlated with soil moisture,all other properties were positively correlated.Organic material was positively correlated with soil moisture,which suggested that organics had the sponge effect and contributed to soil water storage and movement.During the period of June to September,there was no significant correlation between soil water content and total storage.The meteorological factors of temperature,accumulated temperature and sunshine were all inversely and highly significantly correlated with soil water content P<0.01(P=0.00). | Zhong Shouqin Zhang Weihua Lv Jiake Wei Chaofu | 2014 | International Journal of Agricultural and Biological Engineering2014，7，4： | 1 |
| 16 | Etoposide,dexamethasone,and pegaspargase with sandwiched radiotherapy in early-stage natural killer/T-cell lymphoma:A randomized phase III study显示文摘Methotrexate,etoposide,dexamethasone,and pegaspargase(MESA)with sandwiched radiotherapy is known to be effective for early-stage extranodal natural killer/T-cell lymphoma,nasal type(NKTCL).We explored the efficacy and safety of reduced-intensity,non-intravenous etoposide,dexamethasone,and pegaspargase(ESA)with sandwiched radiotherapy.This multicenter,randomized,phase III trial enrolled patients aged between 14 and 70 years with newly diagnosed early-stage nasal NKTCL from 27 centers in China.Patients were randomly assigned(1:1)to receive ESA(pegaspargase 2,500 IU/m^(2)intramuscularly on day 1,etoposide 200 mg orally,and dexamethasone 40 mg orally on days 2–4)or MESA(methotrexate 1 g/m^(2)intravenously on day 1,etoposide 200 mg orally,and dexamethasone 40 mg orally on days 2–4,and pegaspargase 2,500 IU/m^(2)intramuscularly on day 5)regimen(four cycles),combined with sandwiched radiotherapy. | Huijuan Zhong Shu Cheng Xi Zhang Bing Xu Jiayi Chen Xufeng Jiang Jie Xiong Yu Hu Guohui Cui Juying Wei Wenbin Qian Xiaobing Huang Ming Hou Feng Yan Xin Wang Yongping Song Jianda Hu Yuanhua Liu Xuejun Ma Fei Li Chongyang Wu Junmin Chen Li Yu Ou Bai Jingyan Xu Zunmin Zhu Li Liu Xin Zhou Li Huang Yin Tong Ting Niu Depei Wu Hao Zhang Chaofu Wang Binshen Ouyang Hongmei Yi Qi Song Gang Cai Biao Li Jia Liu Zhifeng Li Rong Xiao Luqun Wang Yujie Jiang Yanyan Liu Xiaoyun Zheng Pengpeng Xu Hengye Huang Li Wang Saijuan Chen Weili Zhao | 2023 | The Innovation2023，4，3： | 0 |
| 17 | Prediction of mechanical ventilation outcome by early abdominal-visceral-blood-flow-and-function score in critically ill patients after cardiopulmonary bypass in the ICU: A prospective observational study显示文摘Background:Abdominal organs are important organs that sense and respond to ischemia and hypoxia,but there are few evaluation methods.We use ultrasonography to evaluate abdominal organ function and blood flow in patients with mechanical ventilation(MV)after cardiopulmonary bypass and to obtain a semiquantitative score for abdominal organ function and blood flow.Methods:Patients with cardiopulmonary bypass in the Critical Care Department of Peking Union Medical College Hospital in China from March to July 2021 were enrolled in this prospective observational study.The correlation of the abdominal-visceral-blood-flow-and-function score(AVBFS)with the duration of MV,number of days spent in the intensive care unit(ICU),acute physiology and chronic health evaluation II(APACHE-II),sequential organ failure assessment(SOFA),lactate,epinephrine,and norepinephrine use was analyzed,and the results were used to assess the predictive value of the receiver operating characteristic curve(ROC)regression analysis score for the duration of MV.Results:Of the 92 patients who underwent cardiopulmonary bypass,41 were finally included.The AVBFS were significantly correlated with the duration of MV,number of days spent in the ICU,APACHE-II score,SOFA score,and norepinephrine use time.The AVBFS in a group of patients using ventilators≥36 h were significantly higher than those obtained for a group of patients using ventilators<36 h(P<0.05).The evaluation results for the AVBFS at 0-12 h after ICU admission were as follows:area under the ROC curve(AUC)=0.876(95%confidence interval[CI]:0.767 to 0.984),cut-off value=2.5,specificity=0.842,and sensitivity=0.773.Conclusions:Abdominal visceral organ function and blood perfusion can be used to evaluate gastrointestinal function.It is related to early and late extubation after cardiac surgery. | Chaofu Yue Longxiang Su Jun Wang Na Cui Yuankai Zhou Wei Cheng Bo Tang Xi Rui Huaiwu He Yun Long | 2024 | Journal of Intensive Medicine2024，4，1： | 0 |
| 18 | Occurrence Regularity and Mating Rhythm of Overwintering Adults of Tessaratoma papillosa on Longan Tree显示文摘[Objective] The occurrence regularity and mating rhythm of overwintering adults of Tessaratoma papillosa on longan tree were studied in the paper, so as to provide scientific reference for effective prevention and control against the pest. [Method] During the mating period of overwintering adults of T. papillosa, mating duration, occurrence regularity and mating rhythm of overwintering adults within 48 h as well as their occurrence and mating status during April and June were observed. [Result] Mating duration of T. papillosa adults for 8-9 h accounted for 18.2%, and duration for 10-11 h and more than 13 h accounted for 54.5% and 27.3%, respectively. According to daily observation, the maximum adult quantity of T. papillosa adults appeared at 9:00 am, followed by 13:00 pm. There were two peaks (9:00 am and 13:00 pm) and troughs (6:00 am and 19:00 pm) for adult quantity of T. papillosa and its mating pairs within 24 h a times changed. Mating pairs were positively correlated with observed adult quantity. Adult quantity and mating pairs increased since April 1, and reached the maximum value on April 6. Afterwards, they were gradually dropped down, and almost no adults of T. papillosa were found after June 11. [Conclusion] The mating peak of T. papillosa adults was from April to May, and there were two mating peaks (9:00 am and 13:00 pm) and troughs (6:00 am and 19:00 pm) every day. Adults repeatedly mated and spawned, while mating usually lasted for 10-11 h either during the daytime or at night. | Liu Jimin Huang Qichun Wei Ge Chen Zhenglin Huang Chaofu Wan Chunhui Jia Bao He Ningzu Lu Wen | 2013 | Plant Diseases and Pests2013，4，1： | 0 |
| 19 | The relative contributions of soil hydrophilicity and raindrop impact to soil aggregate breakdown for a series of textured soils显示文摘Soil aggregate breakdown is the first key factor that causes soil erosion.At present,research on the mechanisms of soil aggregate breakdown during rainfall is common.However,the research to on quantifying the relative contributions of internal and external forces to aggregate breakdown remains limited.This paper was conducted to analyse the relative contribution of internal and external forces to aggregate disintegration and the factors affecting aggregate stability during rainfall.Soil aggregates with a series of textures were selected as test soil samples;deionized water was employed as the soaking solution and rainfall material in static disintegration experiments and rainfall simulation tests.The effect of internal force(soil hydrophilicity)on aggregate disintegration was analysed by the static disintegration method,and the combined effects of internal force(soil hydrophilicity)and external force(raindrop impact)on soil aggregate breakdown were analysed by rainfall simulation experiments.The results indicated that external force caused more severe soil aggregate breakdown than internal force,and the crushed aggregate was mainly distributed in the range of 2–0.25 mm.With increasing rainfall kinetic energy,the degree of aggregate breakdown increased gradually,and the degree of aggregation of the soil particles decreased gradually.Furthermore,soil aggregates with a high clay content(>30%)were more stable than medium-clay(20–30%)and low-clay(<20%)soil aggregates,and the correlation coefficient provided a good representation of the relationship between the clay content and soil aggregate stability index(ASI).Therefore,external force contributed more to soil aggregate breakdown than internal force during rainfall,and clay plays an important role in aggregate stability.The results of this study are of great significance for elaborating the mechanism and factors affecting aggregate breakdown. | Jiangwen Li Shouqin Zhong Zhen Han Pengfei Gao Chaofu Wei | 2022 | International Soil and Water Conservation Research2022，10，3： | 0 |
| 20 | Restoration technologies of damaged paddy in hilly post-mining and subsidence-stable area of Southwest China显示文摘The paddy fields and water storage facilities are seriously damaged by the coal mine subsiding in the hilly post-mining and subsidence-stable areas in China,which make the farmers there being suffered greatly from the lack of water for traditional rice cultivation and daily life.The purpose of this paper is to find a method to restore the damaged paddy fields,thereby promoting sustainable development of land resources,and alleviating the contradiction between people and land,as well as creating a more inhabitable environment.The research methodology included field experiments,cultivated observation,and field investigation.This paper selected the Songzao Mining Area as the research area,and focused on the restoration technologies of damaged paddy fields,through the following four different measures at three experimental fields:(1)Traditional repeated cattle plowing(CK);(2)Water retention agent with repeated cattle plowing(W&C);(3)Film without holes under tilth depth(FO);and(4)Film with holes under tilth depth(FW).At last,a contrastive analysis of the four measures was made according to the results of the experiments.The results show that the use of water retaining agent with repeated cattle plowing(W&C)can be the most appropriate method to restore the damaged paddy field in the hilly post-mining and subsidence-stable area in southwest China.Compared with the other three measures,its water productivity is the maximum(0.81 kg/m3),and the net income is the highest(1403$/hm^(2)).What’s more,it is simple,short time-consuming,and low cost,which is benefit to generalize the use of this restoration technology. | Zhong Shouqin Wei Chaofu Liu Bo Zhang Weihua Du Jing Zhang Shichao | 2015 | International Journal of Agricultural and Biological Engineering2015，8，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员