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Soil Erosion and Its Basic Characteristics at Karst Rocky-desertified Land Consolidation Area: A Case Study at Muzhe Village of Xichou County in Southeast Yunnan, China

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Journal of Mountain Science 2010年第1期7卷 55-72页

作者： yang zisheng yang Longfei ZHANG Bosheng Institute of Land & Resources and Sustainable Development Yunnan University of Finance and Economics Kunming650221 China

Xichou County of Wenshan Zhuang and Miao Autonomous Prefecture in southeast Yunnan is one of the karst mountainous areas in southwest China showing typical rock desertification. During this study, we set up three soil erosion contrast test spots at Muzhe Village, Benggu Township, Xichou County, which was the birthplace of the Xichou rock-desertified land consolidation mode. The three spots included the terrace land spot （already consolidated land）, sloping land spot （unconsolidated sloping land under rock desertification）, and standard runoff spot （bare land spot）. In 2007, a whole-year complete observation was conducted during the rainy season and ＂rainfall-erosion＂ data were obtained for 32 times. Our analysis showed that during the entire observation period, the number of the rainfalls that led to soil erosion accounted for 34.04% of the number of all rainfalls and the amount of the rainfalls that led to soil erosion accounted for 84.17% of the total amount of all rainfalls. The average erosive rainfall standard in the three test spots was 11.0mm, slightly higher than the lO mm standard that has been adopted all over China, but lower than the 12.7 mm standard of the US and the 13.0 mm standard of Japan. According to single-factor analysis, the soil loss in the sloping land spot （L2） and that in the bare land spot （L3） are correlated to certain extent to manyother factors, including the single precipitation （P）, rainfall intensity during the maximum ten minutes （Lo）, rainfall intensity during the maximum 20 minutes （I2o）, rainfall intensity during the maximum 30 minutes （I30）, rainfall intensity during the maximum 40 minutes （I4o）, and rainfall intensity during the maximum 6o minutes （I60）. Among these factors, they are of the highest relativity with I6o. According to double-factor analysis, both L2 and L3 are of good relativity with P and I60. According to multi-factor analysis, L2 and L3 are also of good relativity with seven rainfall indexes, namely, P, Ia （ave

关键词： karst mountainous area rockdesertification land consolidation soil erosion testspot Xichou County

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Weak Expansive Soil Physical Properties Modification by Means of a Cement-Jute Fiber

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Fluid Dynamics & Materials Processing 2023年第8期19卷 2119-2130页

作者： zisheng yang Wendong Li Xuelei Cheng Ran Hai Shunqun Li School of Architectural and Civil Engineering Zhongyuan University of TechnologyZhengzhou450007China Yellow River Institute of Hydraulic Research Zhengzhou450003China School of Civil Engineering Tianjin Chengjian UniversityTianjin300384China

Sixteen groups of comprehensive tests have been conducted to investigate the modifications in the physical properties of a weak expansive soil due to the addition of a cement jute *** tests have been conducted to analyze the liquid plastic limit,the particle distribution and the free expansion *** results show that:(1)With an increase in the cement-jute fiber content,the free expansion rate of the modified expansive soil gradually decreases,however,such a rate rebounds when the fiber content exceeds 0.5%and the cement content exceeds 6%.(2)With an increase in the cement percentage,the particle unevenness coefficient(Cu)and curvature coefficient(Cc)of the modified expansive soil tend to grow *** Cc coefficient reaches 1.0 when the cement content is 6%.The unevenness coefficient of 16 soil samples is greater than 5.0,however,the Cu coefficient decreases when the cement content reaches 6%.(3)The plastic limit of soil increases as the cement content is made higher,while the liquid limit and plastic index decrease *** the content of the modified material is 2%+0.1%~2%+0.7%(Cement content+jute fiber content),the change of particle size distribution is most obvious.(4)When the contents of cement and jute fiber are is 6%and 0.5%,respectively,the modification induced in the physical properties of soil samples corresponds to the best case.

关键词： Cement jute fiber expansive soil expansion optimal dosage

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Soil Erosion Control Degree of the Project of Converting Farmland to Forest in Mountainous Areas at China's Southwest Border:A Case Study in Mangshi,Yunnan Province

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Journal of Mountain Science 2011年第6期8卷 845-854页

作者： yang zisheng HAN Huali ZHAO Qiaogui Institute of Land ＆ Resources and Sustainable Development Yunnan University of Finance and Economics Kunming 650221 China Southwest University Chongqing 400715 China Department of Land ＆ Resources of Yunnan Province Kunming 650224 China

There have been few in-depth quantitative studies on soil erosion control and the ecological effects of land use changes. Soil erosion is the first eco-environmental problem particularly in mountainous areas. A major problem in the conversion of farmland to forest is to control soil erosion and improve ecological environment and thus to improve land use sustainability. We report results of calculation and analysis on soil erosion from converted farmland parcels in city of Mangshi （near the SW frontier of China） and the surrounding areas before and after the nine-year （2000-2009） project of converting farmland to forest. There was increased water conservation effect, as a result of decreased soil erosion. The average erosion modulus of the farmland returning to eco-friendly uses decreased by 5,535.59 t/km2·a and the control degree of soil erosion modulus reached 71.00%. The increased soil erosion after the returning in the typical sample area ＂did not drop, but increased＂ as the terraced fields decreased but sloping farmland inereased and yet woodland decreased.

关键词： Soil erosion Control degree The projectof converting farmland to forest Converted farmland

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Changes in Utilization of Contracted Land in Xundian County of Yunnan Province in the Background of Poverty Alleviation

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Asian Agricultural Research 2020年第1期12卷 1-5,9页

作者： Chenhao LU zisheng yang Institute of Land&Resources and Sustainable Development Yunnan University of Finance and EconomicsKunming 650221China

The gradual migration of rural population to cities is an inevitable result of the sustainable development of China’s society and *** out to work is not only a personal behavior of farmers in line with this historical trend,and in the present moment,it is also an important measure to win the battle against *** Yi and Hui Autonomous County is located in the northeast of Yunnan *** is one of the key counties in China’s poverty alleviation and development *** the implementation of special measures to increase labor income,a total of 125611 rural laborers were employed from 2014 to 2018,and as a result,a large number of farmers have been lifted out of ***,under this model,the transfer of a large number of rural laborers also has an impact on the utilization of contracted land of migrant households,mainly demonstrated by land abandonment,decline in land use efficiency and decline in land productivity,which are not conducive to the sustainable use and protection of land *** this end,based on field research,this article analyzes the changes in the utilization of land of migrant households under the poverty alleviation model of working outside,as well as their *** addition,the questionnaire survey of the registered poverty-stricken households show that the area and productivity of land owned by households with migrant workers are on a downward trend compared to those before and those of households without migrant *** transfer is a feasible means to solve this problem and to consolidate the achievements of poverty alleviation and sustainable use of land *** is suggested that great attention should be paid to the contract and management issue of land left by migrant households,establishment of efficient guarantee mechanism,improvement of land utilization and promotion of saving and intensive use of land resources to bring the land resources to their proper value.

关键词： Targeted poverty alleviation Labor migration Rural land use Land transfer Xundian Hui and Yi Autonomous County

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Analysis of the Land Use Structure in Alpine Valley Area of Jinsha River:Taking Xueshan Township,Luquan County,Yunnan Province as an Example

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Asian Agricultural Research 2019年第11期11卷 18-24页

作者： Jia WANG zisheng yang Institute of Land&Resources and Sustainable Development Yunnan University of Finance and EconomicsKunming 650221China

Oriented by ecological,production and living functions of land,this paper analyzes the status of land use in Xueshan Township,Luquan County,Yunnan Province using the method of *** land is classified into general production land,production and ecological land,general living land,living and production land,living and ecological land,general ecological land and ecological and production *** result is compared with the classification system of the second national land *** theory,the classification system of ecological land,living land and production land is *** Xueshan Township,Luquan County,a typical alpine valley area of Jinsha River as an example,based on the survey data on the changes of land use in Xueshan Township in Luquan County in 2016,this paper analyzes the distribution of ecological land,living land and production land in Xueshan *** results show that in Xueshan Township,ecological land(including general ecological land and ecological and production land)has the largest proportion(54.84%)in area,followed by production land(including general production land and production and ecological land)(44.41%),and living land(including general living land and living and production land)has the lowest proportion(only 0.75%).In overall,the distribution of production land and ecological land in Xueshan Township is not reasonable *** example,the proportion of dry land with a slope bigger than 15°and serious oil erosion in the township is currently 79.23%,among which,the dry land with a slope bigger than 25°and particularly serious soil erosion accounts for 52.88%.Therefore,it is necessary to gradually take measures to convert cultivated land into forests and further optimize the structure and spatial configuration of ecological land,living land and production land.

关键词： Land use structure Classification system Land use classification Alpine valley area of Jinsha River Xueshan Township Luquan County

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Analysis on the Influencing Factors and Control Measures of "Non-Grain Conversion" of Cultivated Land in Agricultural Land Transfer

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Asian Agricultural Research 2021年第10期13卷 5-11页

作者： Lixian XIA zisheng yang Institute of Land Resources and Sustainable Development Yunnan University of Finance and EconomicsKunming 650221China

Through the method of literature analysis,this paper analyzes the present situation of the"non-grain conversion"of cultivated land in the transfer of agricultural land in China,summarizes the influencing factors and consequences of the phenomenon of"non-grain conversion"of cultivated land in the transfer of agricultural land,and finally puts forward some *** study found that costs and benefits are the fundamental factors affecting the"non-grain conversion"of cultivated land in agricultural land transfer,and other main factors include government and policy guidance,industrial and commercial capital to the countryside,labor transfer and so ***"non-grain conversion"of cultivated land in the transfer of agricultural land is a serious threat to China s food security,leading to the decline of the quality of agricultural land and the destruction of the ecological environment,as well as the risk of breach of contract in"industrial and commercial capital to the countryside".Based on the understanding of the influencing factors of non-grain conversion,this paper puts forward the following measures:strengthening the control of the use of cultivated land in agricultural land transfer;implementing accurate subsidies for grain cultivation and ensuring the benefit of grain growers;adopting grain planting incentive mechanism to increase grain enthusiasm;strengthening media publicity and education to enhance food security *** improvement of the current situation of the"non-grain conversion"of cultivated land in the transfer of agricultural land will be of great significance to the protection of agricultural land and food security in China.

关键词： Agricultural land transfer Non-grain conversion of cultivated land Food security Influencing factors Measures

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Poverty Alleviation in Xundian Hui and Yi Autonomous County by Promoting Labor Migration

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Asian Agricultural Research 2019年第9期11卷 56-64页

作者： Chenhao LU zisheng yang Targeted Poverty Alleviation and Development Institute Yunnan University of Finance and Economics

The transfer of rural population to urban areas is the inevitable result of China s economic development,and going out to work is an important poverty alleviation model for poor areas to adapt to this historical *** its typical practices not only has practical guidance and reference for targeted poverty alleviation and poverty alleviation work,but also has important implications for how to rationally allocate regional population,resources,environment and *** paper investigates and explores the labor migration-promoting poverty alleviation model in Xundian Hui and Yi Autonomous County in the Wumeng mountainous area,a national concentrated and contiguous poverty-stricken *** the basis of sorting out the leadership system,training methods,assistance ideas,working mechanism and poverty alleviation achievements,the income of 50 poverty-free households in 2018 was investigated and analyzed *** results show that the poverty alleviation in Xundian County has achieved significant achievements both in macro and individual farmers,and it has played a decisive role in getting rid of poverty for households with migrant *** addition,the successful experience of Xundian County to increase income and get rid of poverty is sorted out,and the problems existing in this model are *** is believed that attention should be paid to the impact of labor migration on rural land use and citizenization of migrant workers.

关键词： Targeted poverty alleviation Going out to work for increasing income Rural land use Citizenization of migrant workers Xundian Hui and Yi Autonomous County

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Rehabilitation and Sustainable Use Pattern of Rocky-desertified Land in Southwest China’s Poverty-stricken Karst Mountainous Areas——A Case Study in Benggu Township, Xichou County, Yunnan, China

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Journal of Mountain Science 2006年第3期3卷 237-246页

作者： yang zisheng LIU Yansui BAO Guangjing LI Zhiguo HE Yimei Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Science Beijing 100101 China Institute of Land ＆ Resources and Sustainable Development Yunnan University of Finance and Economics Kunming 650221 China Yunnan University Kunming 650091 China Yunnan University of Finance and Economics Kunming 550221 China

The rocky desert in a karst area directly causes the lack of soil, water and forest, hence leading to the poverty there. In 1990, the villagers from the Muzhe Village in Benggu Township, Xichou County, Yunnan declared a war against rocky desert in an attempt to ask the fields for more yields. They invented a distinctive land rehabilitation and sustainable use pattern called “transforming heavenand earth” that had been practiced in Southwest China’s karst areas. The key mechanism of the pattern was to develop terraced fields with well conserved soil, water and fertility by exploding rocks in the fields, building stone walls, gathering more soil, and improving soil quality and productivity for the fields in combination with building of irrigation facilities and roads, as well as with forestation and agriculture structure adjustment. The purpose of the pattern was to alleviate poverty in the karst areas by improving soil productivity and promoting agriculturaldevelopment. A typical area was studied with the help of Participatory Rural Appraisal (PRA) and the pattern was carried out there for fifteen years, have produced excellent ecological benefits and good economic benefits. Its application in the area approved that it was a sustainable land use pattern for rocky desert areas.

关键词： karst mountainous areas rocky desert sustainable land use pattern land use/cover change(LUCC) poverty alleviation Participatory RuralAppraisal (PRA)

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Evaluation on Terrain-Climate Superiority Degree at County Level in Yunnan Province

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Asian Agricultural Research 2021年第8期13卷 28-32,37页

作者： Renyi yang zisheng yang Institute of Land Resources and Sustainable Development Yunnan University of Finance and Economics Kunming 650221 China

Terrain slope and climate zone(heat zone)are important factors affecting land use zoning and agricultural production layout in mountainous ***"weight grade method",a quantitative index of comprehensively evaluating terrain slope and climatic(thermal)conditions in mountainous areas was proposed:terrain-climate superiority degree(TCSD),and TCSD,terrain superiority degree(TSD),and climate superiority degree(CSD)in 129 counties(cities and districts)of Yunnan Province were measured and *** results showed that TCSD in 50.39%of counties of Yunnan Province was relatively better(levels I and II),and TCSD in 38.76%of counties was moderate(level III),while TCSD in 10.85%of counties was relatively poorer(levels IV and V).

关键词： Terrain slope Climate zone Terrain-climate superiority degree County level Evaluation

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The Model of Health Poverty Alleviation in Poor Mountainous Areas in Southwest China: A Case Study of "5 + 5" Model of Health Poverty Alleviation in Xundian County

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Asian Agricultural Research 2019年第8期11卷 28-33,44页

作者： Wanying DU zisheng yang Targeted Poverty Alleviation and Development Institute Yunnan University of Finance and Economics

Carrying out health poverty alleviation and ensuring the security of basic medical care for the poor are important contents for China to implement the strategy of targeted poverty alleviation and win the battle to get rid of poverty. Xundian Hui and Yi Autonomous County in Yunnan Province is a national poor county integrating ' nationality,poverty,mountainous area and old revolutionary base area'. In recent years,based on the actual situation,Xundian County has explored an effective way of health poverty alleviation. It has effectively prevented the phenomenon of poverty caused by illness and returning to poverty due to illness,and effectively ensured that Xundian County has successfully achieved the goal of getting rid of poverty. Xundian County finally got rid of the shadow of ' poverty' for more than 30 years to become one of the first batch of counties in Yunnan Province to get rid of poverty. This paper makes great efforts to analyze and summarize the specific methods,main achievements,successful experience,lessons and reference about health poverty alleviation in Xundian County. At the same time,it also studies and analyzes the main problems existing in the model,and puts forward the corresponding measures and suggestions,in order to provide a reference for health poverty alleviation in other poor areas.

关键词： Poor mountain area Getting rid of poverty Health poverty alleviation Xundian Hui and Yi Autonomous County

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