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| 1 | 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 |
| 2 | Effect of competition on spatial patterns of oak forests on the Chinese Loess Plateau显示文摘Reforestation or natural forest regeneration is an alternative measure for controlling soil erosion in degraded land on the Chinese Loess Plateau(CLP). However, our understanding of the temporal dynamics and the spatial patterns of forest regeneration remains inadequate. Two oak forests at different development stages were investigated to determine the spatial patterns of competitions(intraspecies and interspecies) during different successional stages. The intraspecies and interspecies spatial relationships among different tree diameters at breast height were analyzed at multiple scales by Kriging interpolation method and univariate and bivariate O-ring statistics. Our analytical results indicated that self-correlation and competition intensity were relatively high between oak and pine trees in the early development stage of oak forests due to their clumped distributions of heavy seeds. Birch trees had a lower competition in comparison to oak trees although birch was the dominant species. Therefore, asymmetric competition of oak trees was most likely to have led to their edge dispersal and their success in replacing the pioneer species. Asymmetric competition means that larger individuals obtained a disproportionately large share of the resources and suppressed the growth of smaller individuals. Kriging interpolation analysis showed a tendency towards homogenization caused by interspecies competition during the succession of oak forests. Our results demonstrated that the competition was the driving factor in the spatial distribution of oak forests on the CLP. | KANG Di DENG Jian QIN Xiaowei HAO Fei GUO Shujuan HAN Xinhui YANG Gaihe | 2017 | Journal of Arid Land2017，9，1： | 3 |
| 3 | Effect of Soil C,N and P Stoichiometry on Soil Organic C Fractions After Afforestation显示文摘Afforestation is recognized as an important driving force for soil organic C(SOC) dynamics and soil element cycling.To evaluate the relationships between soil C:N:P stoichiometry and SOC fractions,soil C:N:P stoichiometry distributions at 0–200 cm soil depths were analyzed and the contents of SOC fractions were evaluated in 9 typical land-use systems on the Loess Plateau of China.The contents of light fraction organic C,particulate organic C(>53,53–2 000,and>2 000 μm),labile organic C,microbial biomass C,and dissolved organic C decreased with increasing soil depth and were higher in afforested soil than in slope cropland soil.Compared with the slope cropland,different vegetation types influenced soil C:N,C:P,and N:P ratios,especially when C:P and N:P ratios were significantly higher(P<0.05).Moreover,SOC fractions at the 0–10 and 10–40 cm depths were particularly affected by soil C:P ratio,whereas those at the 40–100 and 100–200 cm soil depths were significantly affected(P<0.05) by soil N:P ratio.These results indicate that changes in SOC fractions are largely driven by soil C:P and N:P ratios at different soil depths after afforestation. | ZHAO Fazhu ZHANG Lu SUN Jiao REN Chengjie HAN Xinhui YANG Gaihe PANG Guowei BAI Hongying WANG Jun | 2017 | Pedosphere2017，27，4： | 1 |
| 4 | Optimizing feeding composition and carbon-nitrogen ratios for improved methaneyield during anaerobic co-digestion of dairy,chicken manure and wheat straw显示文摘 | Xiaojiao Wang Gaihe Yang | 2012 | Bioresource Technology2012，120，： | 1 |
| 5 | Comparison of biogas development from households and medium and large- scale biogas plants in rural China显示文摘 | SONG Zilin ZHANG Chao YANG Gaihe | 2014 | Renewable and Sustain able Energy Reviews2014，33，： | 1 |
| 6 | Household biogas use in rural China: A study of opportunities and constraints 显示文摘 | Yu Chen Gaihe Yang Sandra Sweeney Yongzhong Feng | 2010 | Renewable and Sus- tainable Energy Reviews2010，14，： | 1 |
| 7 | Household biogas use in rural China: A study of opportunities and constraints显示文摘 | Yu Chen Gaihe Yang Sandra Sweeney Yongzhong Feng | 2009 | Renewable and Sustainable Energy Reviews2009，，1： | 1 |
| 8 | Household biogas use in rural China : A study of opportunities and con- straints 显示文摘 | Yu Chen Gaihe Yang Sandra Sweeney | 2010 | Renewable and Sustainable Energy Reviews2010，，14： | 1 |
| 9 | Anaerobic digestion of pig and dairy manure under photo-dark fermentation condition显示文摘 | Dongxue Yin Wei Liu Ningning Zhai Gaihe Yang Xiaojiao Wang Yongzhong Feng Guangxin Ren | 2014 | Bioresource Technology2014，，： | 1 |
| 10 | Household biogas development in rural China: On poficy support and other macro sustainable conditions 显示文摘 | Yongzhong Feng Yah Guo Gaihe Yang Xiaowei Qin Zilin Song | 2012 | Renewable and Sustainable Energy Reviews2012，16，8： | 1 |
| 11 | Household biogas use in rural China: A study of opportunities and constraints显示文摘 | Chen Yu Yang Gaihe Sweeney Sandra | 2010 | Renewable and Sustainable Energy Reviews2010，14，1： | 1 |
| 12 | An assessment of the availability of household biogas resources in rural China显示文摘 | Y u Chen Gaihe Yang Sandra Sweeney | 2010 | International Journal Of Energy And Environment2010，1，5： | 1 |
| 13 | House- hold biogas use in rural China: A study of opportunities and constraints 显示文摘 | Chen Yu Yang Gaihe Sweeney Sandra | 2010 | Renewable and Sustainable Energy Reviews2010，14，1： | 1 |
| 14 | Seeking sustainable solutions for human food systems显示文摘Sustainable food system development is the cornerstone of global human survival and development.This research briefly analyzes the challenges facing the current food system,summarizes the directions of food system trans-formation,expounds the role of geography in the transformation of food system,and discusses the future paths to promote the sustainable development of food system.The main conclusions are as follows:1)The interaction of factors such as regional conflicts,climate change,slowdown in development,raging epidemics,and resource and environmental constraints pose multiple challenges to the global food system.2)The food system should be high-quality,efficient,nutritious and healthy,green and low-carbon,inclusive and inclusive transformation.3)Geography can provide solutions for the transformation of food systems.4)The transformation paths of the food system includes:establishing a global food system with benefit sharing,cleaner production,and fair participation,improving the innovation capability of the food system,and establishing an effective organizational guarantee system. | Zhiyuan Zhu Jiajia Duan Zhenzhong Dai Yongzhong Feng Gaihe Yang | 2023 | Geography and Sustainability2023，4，3： | 0 |
| 15 | N-cycle gene abundance determination of N mineralization rate following re-afforestation in the Loess Plateau of China显示文摘Afforestation effectively improved soil microbial communities and significantly increased soil nitro-gen mineralization rate(Rm).Soil microorganisms drive Rm by regulating soil N-cycling genes.Soil nitrification genes had a major effect on soil Rm than denitrification genes after afforestation.Assessing the function of forest ecosystems requires an understanding of the mechanism of soil nitrogen mineralization.However,it remains unclear how soil N-cycling genes drive soil nitrogen mineralization during afforestation.In this study,we collected soil samples from a chrono-sequence of 14,20,30,and 45 years of Robinia pseudoacacia L.(RP14,RP20,RP30,and RP45)with a sloped farmland(FL)as a control.Through metagenomic sequencing analysis,we found significant changes in the diversity and composition of soil microbial communities involved in N-cycling along the afforestation time series,with afforestation effectively increasing the diversity(both alpha and beta diversity)of soil microbial communities.We conducted indoor culture experiments and analyzed correlations,which revealed a significant increase in both soil nitrification rate(Rn)and soil nitrogen mineralization rate(Rm)with increasing stand age.Furthermore,we found a strong correlation between soil Rm and soil microbial diversity(both alpha and beta diversity)and with the abundance of soil N-cycling genes.Partial least squares path modeling(PLS-PM)analysis showed that nitrification genes(narH,narY,nxrB,narG,narZ,nxrA,hao,pmoC-amoC)and denitrification genes(norB,nosZ,nirK)had a greater direct effect on soil Rm compared to their effect on soil microbial communities.Our results reveal the relationships between soil nitrogen mineralization rate and soil microbial communities and between the mineralization rate and functional genes involved in N-cycling,in the context of Robinia pseudoacacia L.restoration on the Loess Plateau.This study enriches the understanding of the effects of microorganisms on soil nitrogen mineralization rate during afforestation and provides a new theoretical basis for evaluating soil nitrogen mineralization mechanisms during forest succession. | Yaping Zhao Yuqing Zhao Shuohong Zhang Yulin Xu Xinhui Han Gaihe Yang Chengjie Ren | 2024 | Soil Ecology Letters2024，6，1： | 0 |
| 16 | SEVERAL SCIENTIFIC PROBLEMS ON ECOLOGICAL SAFETY AND AGRICULTURAL SUSTAINABLE DEVELOPMENT IN WEST CHINA | Yang Zhengli 1, Yang Gaihe 1 and Zhang Dapeng 2 (1.Northwest Sci Tech University of Agriculture and Forestry, Yangling 712100, Shaanxi, China 2.Station of Soil and Manure, Department of Agriculture, Shaanxi, 710000, China) | 2002 | Natural Disaster Reduction in China2002，，2： | 0 |
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