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返贫，农村低收入人口，乡村振兴，扶贫产业，脱贫攻坚 1

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Feasibility analysis of mixed-income housing in China

TIAN Ye, BI Xiangyang, LI Dexiang

《结构与土木工程前沿（英文）》 2007年第1卷第3期页码 371-377 doi: 10.1007/s11709-007-0050-y

摘要： In this paper, it is demonstrated that mixed-income housing is a feasible and beneficial pattern nowadays. This pattern is propitious for good living and harmonious development of society. Based on practice, data are gathered from the field, and the social investment and social distance analysis of the social network theory are used from the perspective of cross-disciplinary fields. The hypothesis is tested and the feasible and beneficial characteristics of mixed-income housing are pointed out.

关键词： beneficial distance analysis harmonious development hypothesis perspective

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依赖特许收益的PPP项目补偿契约激励性与有效性

吴孝灵,周晶,王冀宁,彭以忱

《中国工程科学》 2014年第16卷第10期页码 77-83

摘要：

考虑到public private partnership（PPP）项目实际收益的不确定性，首先基于政府需求，通过引入项目运营收益的相对补偿指数，设计一种依赖特许收益的单期补偿契约；然后基于政府无法将私人投资变量纳入该契约，分别从集中决策与分散决策角度建立公私之间博弈模型来研究该契约的最优形式及其激励性与有效性，并给出政府有效补偿对策。研究表明：所得最优补偿契约既能激励私人选择政府集中决策时的最优初始投资，又能激励私人与政府共担风险、共享收益，但有效补偿还应满足项目社会效益约束，即对政府意味着有效补偿应适应项目实际不同情景。

关键词： PPP项目特许收益单期补偿激励性有效性

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AGRICULTURAL GREEN DEVELOPMENT IN THE ERHAI LAKE BASIN—THE WAY FORWARD

《农业科学与工程前沿（英文）》 2023年第10卷第4期页码 510-517 doi: 10.15302/J-FASE-2023524

摘要：

Pollution of high-altitude lake basins by agriculture and rural activities, and the control of this pollution, have received increasing attention from academic research and government policy in China. Series of restrictions and regulations have been implemented to protect the surface water quality. These restrictions and regulations have greatly impacted and transformed the agricultural systems and rural livelihoods surrounding these lake basins. Using Erhai Lake basin in Yunnan Province as a case study, three main challenges were identified for concurrently decreasing pollution in the lake and increasing farmer income. It is contended that scientifically-sound environmental protection policies and agricultural green development practices are key to reversing the current situation. This will help to protect the lake from pollution while smallholder farmers will be able to produce healthy food in an environmentally sustainable manner, and with a fair remuneration for all the services farmers provide to the society.

关键词： agriculture farmer income nitrogen phosphorus water pollution

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新阶段巩固拓展脱贫攻坚成果面临的挑战与政策建议

程国强,邓秀新

《中国工程科学》 2021年第23卷第5期页码 148-156 doi: 10.15302/J-SSCAE-2021.05.019

摘要：

巩固拓展脱贫攻坚成果，防止规模性返贫，是“十四五”时期必须守住的底线任务，为此要强化返贫风险治理，实施“分类施策、精准帮扶”策略，促进建立巩固脱贫攻坚成果的长效机制。本文分析了新发展阶段巩固拓展脱贫攻坚成果面临的挑战，主要有脱贫人口返贫风险成因复杂、扶贫产业可持续发展能力不强、乡村卫生健康事业发展仍然滞后、脱贫地区农村饮用水安全保障不足、乡村治理不能适应新形势要求等，总结了巩固拓展扶贫攻坚成果的基本思路，从注重增加制度供给、破解资源环境约束、激发脱贫人口内生动力等3 个方面提出了巩固拓展脱贫攻坚成果的关键任务，并针对性地提出了政策建议。本文从构建农村低收入人口识别机制、实施扶贫产业提质增效工程、提升乡村治理能力、实施乡村名医堂工程、加强农村饮水质量安全保障等5 个方面提出了巩固拓展脱贫攻坚成果的政策建议。

关键词：返贫，农村低收入人口，乡村振兴，扶贫产业，脱贫攻坚

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Innovative agricultural extension value chain-based models for smallholder African farmers

Bidjokazo FOFANA, Leonides HALOS-KIM, Mercy AKEREDOLU, Ande OKIROR, Kebba SIMA, Deola NAIBAKELAO, Mel OLUOCH, Fumiko ISEKI

《农业科学与工程前沿（英文）》 2020年第7卷第4期页码 418-426 doi: 10.15302/J-FASE-2020358

摘要： The value chain extension strategy of Sasakawa Africa Association focuses on improving the capacity of national agricultural extension systems and follows various thematic areas along the value chain to address key challenges accountable for low income households and poverty in Africa. Farmer learning platform is a model designed to increase crop productivity and encompasses demonstration plots where technological packages demonstrated significantly outperformed other technology plots in crop productivity and average profit margins. Enterprise-oriented production, postharvest and trading centers are value adding models designed to improve the effectiveness of extension and adoption of postharvest and agricultural processing technologies by producers. The use of the above along with necessary capacity building has facilitated the development of profitable business linkages of smallholder farmers with financial institutions and reliable market opportunities. The community association trader-trainer model is a market-oriented business approach applied in combination with other extension models. In 2018, 297 community-based commodity association trader-trainers were mobilized and capacitated to improve farmer group dynamics and developed collective input and output access and cluster aggregation centers at community level where various agricultural produces were mobilized and collectively aggregated, and valued at about 3.9 million USD. The supervised enterprise project model is an innovative agricultural extension model developed along with above models for capacity development of extension agents and transfer of technologies to smallholder farmers. Over 6000 supervised enterprise projects have been introduced into 27 universities in 12 African countries for training front-line extension officers and extension delivery to farming communities.

关键词： crop productivity extension farmer grain yield income model

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Sustainable management of Chinese grasslands—issues and knowledge

David KEMP, Guodong HAN, Fujiang HOU, Xiangyang HOU, Zhiguo LI, Yi SUN, Zhongwu WANG, Jianping WU, Xiaoqing ZHANG, Yingjun ZHANG, Xuyin GONG

《农业科学与工程前沿（英文）》 2018年第5卷第1期页码 9-23 doi: 10.15302/J-FASE-2018204

摘要： China has almost 400 Mhm of grasslands, 90% of which is considered degraded to varying degrees, on which 16 million herders depend for their livelihoods and many more indirectly, along the value-adding chain. Since 1950, average stocking rates across China have increased 4-fold. National policies have focused over recent decades on finding ways to rehabilitate the degraded grasslands, to sustain livestock production from them, and to improve the livelihoods of herder households, who are among the poorest people in China. A large collaborative program commenced in the early 2000s to help find solutions to the sustainable management of grasslands. This paper summarizes key findings of many research projects, identifies where knowledge is weak and argues that the successful rehabilitation of grasslands will also require policies that provide incentives and support for herders as they move from a focus on survival to a focus on production of higher quality products, for which consumers are increasingly willing to pay. A key focus is to emphasize the improvement of animal production per head. When this is done, it naturally leads to lower stocking rates, which in turn provides the opportunities for grasslands to recover. Across a range of experiments, farm demonstrations and analyses using models, in Inner Mongolia and Gansu, a consistent result has been that a 50% reduction in stocking rates, improves net household income and starts the process of grassland rehabilitation. Rather than focusing on stocking rates, better management of grasslands could be achieved by maintaining the grasslands above critical values for herbage mass, values that help optimize botanical composition, reduce soil erosion, optimize animal growth rates and aid ecosystem functions. Managing to critical values for herbage mass is likely to be more effective than efforts to calculate sustainable stocking rates. An early summer rest is valuable for aiding grassland rehabilitation and summer productivity, but a total grazing ban (typically for 5 years) may not achieve its aims as evidence shows it may take 10–15 years to achieve a better grassland state. Less-desirable plant species often increase in degraded grasslands that are rested and grazing can help manage those species. Surveys of herders indicate they have very mixed views on the benefits of total grazing bans that are unlikely to rehabilitate grasslands to an ideal botanical composition. The current objective is to work with grasslands that herders now have and optimize the existing composition. Grazing grasslands in winter results primarily in weight loss by animals and there is now evidence of how winter grazing reduces grassland growth in the next summer. It is better to keep animals in well-built sheds and feed them better, improved feeding through the cold months is required. In addition to the application of results from national programs designed to improve grasslands, it will be important to train herders as they move from survival to production, to foster the development of better markets for their livestock products, to devise better financial support for herder businesses and to revise land tenure arrangements so that herders can expand the area of land they graze on better terms than apply at present.

关键词： China grasslands management rehabilitation stocking rate income system analysis