生计多样化背景下种植业非点源污染负荷演变

依托三峡库区典型村农户访谈数据,基于收益最大目标决策框架,设定农村转型发展中3种农户生计类型情景：农业主导生计、兼业转向生计和非农主导生计,解析种植业产污负荷随主导生计非农转向的演变特征,探讨主导生计类型转向的动力机制。结果表明：① 样区耕地经营现状呈自耕、流转与撂荒并存的多元化发展格局,且表现出“入”小于“出”的特征,不同农户家庭类型间实际人均耕种规模为“半劳动力家庭”>“无劳动力家庭”>“劳动力家庭”;② 种植业单位面积产污负荷中,“半劳动力家庭”最高,“劳动力家庭”次之,“无劳动力家庭”最低,“劳动力家庭”内部又随劳动力人数增加呈先增再减趋势;③ 样区农户生计类型由农业主导向非农主导转型过程中,种植业产污负荷最大减幅达72.01%,兼业转向生计情景下削减幅度为19.61%~29.85%,非农主导生计情景下减幅为35.20%~72.01%,但TN、TP的减量特征并不一致;④ 劳动力配置与生计来源“非农化”促使农户主导生计类型向非农转化,生计非农演变的潜在农户收入/福祉权衡亦驱使生计决策转向非农化,不同农户家庭类型对生计转向的敏感程度表现为“劳动力家庭”>“半劳动力家庭”>“无劳动力家庭”;⑤ 在新型城镇化快速推进和创新新型工业体系构建过程中,山区农户生计类型进一步向非农转变,而这一过程又将促使种植业产生的污染负荷量进一步减少,要大幅削减种植业产污负荷,就必须制定有助于山区农户生计非农化的调控对策。     

Characteristics of nonpoint source pollution load from crop farming in the context of livelihood diversification

Based on objective data collected from interviews in typical villages of the Three Gorges Reservoir Area, the present study devised three livelihood scenarios related to rural transformation development: agriculturally dominant livelihood, multiple-type livelihood and non-agriculturally dominant livelihood. Moreover, the present study reports the trend characteristics of nonpoint source pollution load of crop farming in relation to the transformation of dominant livelihood types, and discussed the primary factors which affect livelihood type transformations. Results indicated the following: (1) The current farmland pattern shows a trend of diversification as self-cultivation, cropland transfer and fallow in the sample region. Dynamic characteristics of cultivated land present a special feature that is more “transfer-into” than “transfer-out”. Various scales of planting are represented among the various households, according to the following decreasing order: half-labor household > non-labor household > adequate labor household. (2) The highest pollution loading produced by crop farming occurs in half-labor households while the lowest occurs in non-labor households. With increasing labor, the pollution load per unit area tends to first increase and then decrease within families with enough labor. (3) As the type of livelihood transitions from agriculturally dominant to non-agriculturally dominant, the maximum reduction of total pollution loading produced by the agricultural industry can reach 72.01%. Compared to agriculturally dominant livelihoods, multiple-type livelihoods produce a pollution load reduction yield of 19.61%–29.85%, and non-agriculturally dominant livelihoods reduce the pollution load yield by 35.20%–72.01%. However, the rate of reduction of total nitrogen is not the same as total phosphorus. (4) The non-agricultural characteristics of labor allocation and income promote the transformation from dominant livelihood types to non-agricultural livelihoods, while potential revenue conversion follows a similar trend. In addition, different household types do not display identical conversion rates, according to the following decreasing order: enough labor household > half-labor household > non-labor household. (5) During rapid urbanization and the building of new industrial systems, the livelihood types of rural households have been further transformed to off-farm household types in the mountainous region; this process will lead to the further reduction of pollution load generated by planting and agriculture. Hence, significant decreases in the planting pollution load necessitate the development of control measures to enhance transformations from agricultural to off-farm livelihoods.     

基于生计视角的异质性农户转户退耕决策研究

对重庆市贫困与生态脆弱区的云阳县、石柱土家族自治县376 户农户调研基础上, 将农户划为纯农户、农业主导户、非农主导户和弃农农户, 基于生计视角对农户转户退耕决策进行了解释。结果表明:①重庆市农户兼业普遍, 兼业是农户重要的生计策略;从纯农户到弃农农户, 农户生计资产依次递增, 尤其是人力资产、金融资产和社会资产。②随着兼业程度提高, 农户生计策略逐渐多元化。纯农户生计高度依赖土地;农业主导户开始选择非农兼业;非农主导户生计多样化指数最高;弃农农户生计已经转移到非农产业。③生计是影响农户转户退耕决策的关键因素:纯农户生计资产匮乏, 决策受政策导向明显;作为理性经济人, 对土地经济收益的依赖使农业主导户转户退耕意愿不明显, 对政策响应平淡;非农主导户将权衡转户退耕的补偿与损失, 政策响应模糊;弃农农户资产丰富, 对转户退耕决策响应积极。基于户籍制度改革和可持续生计视角, 本文提出了理性政府行为的3 大对策, 即:建立转户退耕的社保及补偿、激励机制;基于农户生计视角, 实施各种工程措施及惠民政策, 促进农户生计策略多元化;针对不同区位的农户实施差别化的政策。     

大都市郊区农户生计多样化及对土地利用的影响——以北京市大兴区为例

以北京市大兴区为例,采用农户调查数据,设计不同资源群体农户分类评价指标体系,利用非系统聚类方法将农户划分为5类(①中等资源禀赋,中等非农收入;②高等资源禀赋,中等非农收入;③中等资源禀赋,低等非农收入;④纯农户;⑤非农户),进而分析了不同资源群体农户的生计多样化特点及对土地利用的影响。研究表明:(1)在大都市郊区,农户类型1～3、纯农户和非农户分别采取了农业和非农兼顾、留在农业和脱离农业的生计策略。(2)农户类型1～3和纯农户中,70%农户生计多样化指数分布在2～3之间,且依然呈现粮食作物播种面积较大,选择比例最高,其次是经济作物。(3)农户类型1～3和非农户中,以就地转移方式非农就业是农户家庭劳动力安排的主要选择,且非农就业劳动力年龄最轻和教育水平最高。(4)大都市郊区土地非农化的转型特点促使农户从类型1～4被动地向类型5转化,土地利用效益低下也持续推动了农户生计多样化,同时,农户生计多样化会引发粮食生产能力停滞不前、土地流转和产权调整大规模顺势而生、土壤养分富集等土地利用现象。     

秦巴山特困区农户生计资本及生计策略研究——以商洛市为例

基于秦巴山商洛地区农户问卷调查数据,在可持续生计框架下,聚焦不同群体之间生计资本状况,并探讨其农户生计资本对生计策略选择的影响以及生计资本的耦合性。结果表明：（1） 山区农户生计策略出现明显分化,依据非农收入比重分为纯务工型、务工主导型、兼业型和纯农型4种类型。（2） 调研样本中农户生计资本有限和不均衡,呈现金融资本和社会资本相对较高,自然资本、人力资本偏低的特征。非贫困户中兼业型生计资本总值最高,务工主导型、纯务工型次之,纯农型最低;贫困户中务工主导型生计资本总值最高,纯务工型、兼业型次之,纯农型最低。（3） 非贫困户中人均耕地面积、人均林地面积、耕地质量、职业技能水平、政治资源、就业网络对纯务工型农户向务工主导型、兼业型转变有着积极影响,家庭人均收入、男性劳动力比例则具有负向影响;家庭人均收入和职业技能水平对于纯务工型向纯农型转变有负向影响。贫困户中人均耕地面积、人均林地面积、政治资源对纯务工型农户向务工主导型、兼业型和纯农型转变具有正向影响,家庭人均收入、劳动力教育水平、职业技能水平、联系成本则具有负向影响。（4） 非贫困农户生计资本耦合度依次为兼业型＞务工主导型＞纯务工型＞纯农型;贫困农户则为兼业型＞纯务工型＞务工主导型＞纯农型。因此,开展农户可持续性生计研究,对于农户减贫、促进乡村地区发展具有重要意义。     

北方生态脆弱区农户兼业对耕地利用的影响(英文)

当前我国农户兼业现象十分普遍。本文基于在内蒙古太仆寺旗的农户调查数据,采用单因素方差分析法,对生态脆弱区农户兼业及其对耕地利用的影响进行了研究。结果表明:当前研究区农业劳动力非农就业和农户兼业现象十分突出,而兼业程度不同的农户,其经营土地的方式差异明显。非农就业户通过将其土地转给其他农户而脱离了农业耕作,这同时满足了其他农户扩大土地经营面积的愿望。种植结构差异不大,均体现为劳动生产率高的作物具有优势;对于有耕地利用行为的纯农业户、I兼型农户和II兼型农户,随着兼业程度的增加,物质投入增加,说明农户兼业使其资金约束减小,增加了资金投入能力,但是在劳动力约束下,兼业农户的劳动力投入减少,且务农劳动力"妇女化"、"老龄化"和"文化低"等现象突出;作物单产和土地净收益纯农业户大于兼业农户,说明劳动投入对土地产出更为重要。文章最后认为建立农业劳动力非农就业与耕地利用相互协调的机制,是解决生态脆弱区生态安全与农业生产之间矛盾的重要途径。     

内蒙古半农半牧区农户生计资产与生计方式研究——以科右中旗双榆树嘎查为例

基于可持续生计框架,采用统计分析和深度访谈法,将研究区293户农户按生计活动类型划为牧户（牛户、羊户、牛羊户和马户）、种植户和非农户,并按农户生计资产总值进一步划为高、中、低3个等级类型,进而分析了不同类型和不同等级农户的生计资产与生计活动及方式的依存关系。研究发现：各类农户的生计资产均值差距明显,牧户最高,为0.37,种植户为0.25,非农户为0.21;牧户的劳动力、草场、牲畜、现金、贷款等资产均值最高,种植户的农机和耕地资产均值最高,非农户的社会资产均值最高。目前,半农半牧区的农户仍然以旱作种植业和草地畜牧业为主要生计,但农牧业生产均面临较大的资源环境压力;非农户只占15.3%,且面临非农就业机会不足、个人技能缺失、语言障碍和务农时间与用工季节的冲突。最后,提出了提高农户收入和改善农户生计的对策建议。     

贫困山区脱贫农户的生计可持续性及生计干预——以陇南山区为例

增强贫困山区脱贫农户的生计可持续性不仅是新时期农村扶贫的现实需求,更是推动乡村振兴的客观要求。论文从生计资本、生计策略及生计环境出发,建立了脱贫农户的生计可持续性评价指标体系,利用陇南山区脱贫农户的入户调查资料,评估贫困山区脱贫农户的生计可持续性、识别脱贫农户的生计障碍。研究发现:① 从川坝河谷区、半山区到高山区,从早期脱贫到后期脱贫,脱贫农户的生计可持续性依次降低,且务工型与农工互补型脱贫农户的生计可持续性强于其他生计方式农户;② 陇南山区生计不可持续脱贫农户比重达28.83%,高山区、传统务农型及后期脱贫户中生计不可持续农户比重较高,而川坝河谷区、农工互补型与务工型及早期脱贫户中该比重较低;③ 生计不可持续脱贫户均面临着多元生计障碍,其中近2/3的农户面临多维资本—环境阻滞型与多重要素阻滞型障碍;④ 针对生计不可持续脱贫农户面临的多元生计障碍,需分类实施多维生计干预。     

Diversification of Livelihoods in a Society in Transition: A Case Study of Tibetan Communities in Southwest China

In recent years, large development and market integration programs have altered the socioeconomic structures and cultural identity of rural communities and ethnic minorities in Southwest China and influenced the management of natural resources. This article analyzes livelihood strategies in the Shuiluo Valley, a remote area of the Sino-Tibetan borderlands. Agricultural activities and the management of natural resources were studied in five villages of Muli Tibetan Autonomous County, Sichuan Province. Characteristic for rural societies in transition, livelihoods were found to be flexible, combining subsistence agriculture, off-farm employment, and the exploitation of both renewable and nonrenewable natural resources. Accessibility of villages did not influence household income and livelihood activities, and poorer households were not found to depend more on natural resources or on income from agriculture than wealthier households. The option of gold prospecting constitutes a major difference compared to more nontimber forest product-based livelihoods in adjacent areas of Southwest China.     

草原牧区旅游发展对牧户生计的影响 ——以内蒙古希拉穆仁草原为例

草原牧区旅游发展是牧区实现乡村振兴的重要引擎。以内蒙古希拉穆仁草原旅游地牧户为研究案例,分析草原牧区旅游发展对牧户生计的影响。研究结果：① 草原旅游使牧户生计模式分化为纯牧户、务工主导型、旅游主导型、旅游专营型,且呈现纯牧户向务工主导型牧户过度,务工主导型牧户向旅游主导型牧户过度,旅游主导型牧户向旅游专营型牧户过度的一般演替规律;② 草原旅游发展总体上提高了牧户的生计资本存量,但不同类型牧户生计资本存量具有显著差异,生计资本存量由高到低排序为：旅游专营型牧户、旅游主导型牧户、务工主导型牧户、纯牧户;③ 牧户参与草原旅游,准则层因子障碍度由大到小排序为：人力资本、金融资本、物质资本、社会资本、自然资本;障碍度指数前6位的指标层因子分别是：成人受教育程度、成人劳动力人数、借债情况、社团网络、生产生活设备、社会参与;④ 不 同类型牧户参与草原旅游发展的首要障碍因素不同,纯牧户是受教育程度,务工主导型牧户是家庭人均收入,旅游主导型与旅游专营型牧户是借债情况。     

Agricultural practices and sustainable livelihoods: Rural transformation within the Loess Plateau,China

Effective agricultural practices can enable and sustain rural livelihoods, particularly in rapidly developing and transforming areas such as the Chinese Loess Plateau. Drawing from the Sustainable Livelihoods Approach (SLA), a conceptual framework for agricultural practices and sustainable rural livelihoods for the Yangou watershed within the Chinese Loess Plateau is presented and discussed. It is found that agricultural practices that include building terraces, returning sloped farmlands to forestland and grassland, and expanding orchards all have had positive and significant impacts on farmers' livelihood assets, strategies, outcomes, and vulnerabilities. From 1997 to 2006, 48.4 ha (95%) sloped farmland in the Yangou watershed was converted to new land management, and the percentages of income from fruit sale and sale of labor to total income dramatically increased by 59% and 14%, respectively. The watershed community also experienced 159% raise in per capita net income from 1997 to 2003, while the watershed itself experienced a 99% decrease in sediment yield from 1998 to 2007. These positive and significant impacts of new agricultural practices on the sustainable rural livelihoods of the Yangou watershed are evident in the community's reduced dependence upon grain and subsidies income, the diversified strategies for livelihood, and the improved environmental indices. The successful implementation of new agricultural land management practices and policies in the Yangou watershed strongly suggest that similar transformations can be achieved in similar regions throughout China's vast rural areas of the Loess Plateau.     

Downstream effects of dams on livelihoods of river-dependent communities: the case of Ghana’s Kpong Dam

Construction of dams affects the livelihoods of the population living along the dammed river. There is a need for more studies to guide dam development policies and management to safeguard the livelihoods of local river users. This paper examines the effects of dams on the socio-economic livelihoods of downstream communities by drawing on the Kpong Dam in Ghana constructed from 1979 to 1982 with the goal of supplying energy and for irrigation purposes. Primary data were collected in resettled and non-resettled downstream communities using a mixed-research approach. This case study highlights how the Kpong Dam has affected the downstream river-dependent population whose livelihoods, particularly farming and fishing revolved around the seasonal flow regimes of the Volta River. Our study challenges the general perception that dams increase agricultural production by illustrating that developing ancillary facilities such as irrigation schemes as part of dam projects can enhance all-year-round agricultural production to improve food and income security of downstream households only when constraints such as lack of farm inputs are addressed. To safeguard livelihoods and limit the social impacts of dams, compensation schemes and alternative livelihood activities should be designed to include resettled and non-resettled communities along the downstream areas affected by dam projects.     

Comprehensive Evaluation of Farm Household Livelihood Assets in a Western Mountainous Area of China: A Case Study in Zunyi City

As the foundation of farm household structure, livelihood asset status is the basis for farmers to gain opportunities, adopt livelihood strategies, resist livelihood risk, and engage in positive livelihood achievements. Quantifying farm household assets identifies future development trends that are fundamentally necessary to predict farm household vulnerability and strategy, as well as understanding farmers’ current living situations. Using Zunyi City in China’s western mountainous area as a case study, we conducted stratified sampling and participatory rural investigation appraisal to collect data on the attributes of farm households’ livelihood assets and livelihood strategies to establish an index evaluation system and enable evaluation and analysis of farm households with different livelihood strategies. Our research indicates that due to structural differences, total livelihood assets of farm households with different livelihood strategies are similar. Rural households have an abundance of natural and material assets and deficiencies in human, financial and social assets. Non-rural households and part- time households are abundant in human, financial and social assets and deficient in natural and material assets.     

Livelihoods in transition: transnational gold mining operations and local change in Cajamarca, Peru

This paper examines how transnational gold mining operations are transforming rural household livelihoods in the Cajamarca region of Peru. In particular, this paper evaluates how Newmont Mining Corporation's Minera Yanacocha (MYSA) mining operations are altering access to the produced, human, natural and social capital resources that households utilize to produce their livelihoods. The paper argues that while access to produced and human capital resources has increased in the past decade, albeit unevenly, access to natural and social capital resources has declined. The paper begins with a discussion of new frameworks for evaluating local livelihood change and household access to resources. Subsequently, the paper describes Peru's new transnational mining sector, livelihoods and livelihood change in the Cajamarca region. The paper then presents the results of case study field research evaluating the impacts of MYSA on household access to resources in three communities. Finally, the paper concludes with a critical discussion of livelihoods frameworks and how they can contribute to geographic studies.     

华北平原“杨上粮下”现象的驱动机制——以河北省文安县为例

以Landsat5TM遥感影像、农户调查数据和统计数据为基础数据,运用3S技术提取了案例区河北省文安县1995～2007年土地利用变化信息,分析了杨树扩张的时空格局;并从农户杨树种植决策行为视角,运用数理统计、投入产出法分析了杨树扩张占地的驱动因素。结论如下:(1)杨树林地扩张幅度大、速率快。(2)杨树扩张所用土地92.14%来源于耕地,"杨上粮下"现象突出。(3)杨树扩张速率的空间差异显著。杨树扩张受生产要素、土地产品市场及政策因素的综合驱动,其中劳动力因素和经济因素起主要作用。(4)非农从业人员比率和农民年人均收入越高,杨树扩张速度越快。在劳动力由富余转为相对稀缺的情况下,农户为提高经济收益,倾向选择耗工少,劳动生产率较大的杨树,是杨树扩张占地的根本原因。     

不同城市化水平地区农户农地收入分析——基于浙江省农户的问卷调查

用SPSS13.0单因素方差分析和均值比较方法,对浙江省不同城市化地区的农户农地收入比重进行比较分析。认为城市化不同,农户农地收入比重不同,城市化程度高的地区农户农地利用经济收入比值的平均值低于城市化程度低的地区,但城市化程度高的地区农户农地收入比值标准差大于城市化低的地区,其中主要原因是城市化不同导致农户兼业时间不同。提出要创造条件促进资源集中型农户兼业化,使农户农地利用经济效率得到提高,缩小城乡收入差距。     

生计资产差异对农户耕地保护补偿模式选择的影响——渝西方山丘陵不同地带样点村的实证分析

耕地比较效益低下引致耕地保护经济补偿成为破解耕地保护问题的客观选择,而影响经济补偿成败的关键因素之一在于补偿模式设计是否符合农户诉求,因此定量刻画农户生计资产差异对其补偿模式选择的影响便是补偿模式设计的核心.运用参与式农村评价法(PRA)对渝西方山丘陵3 个样点村392 户农户进行了实地调查,构建了农户生计资产六边形计量分析框架,运用灰色关联分析模型和Probit 回归分析法对农户生计资产差异与补偿模式选择意愿间耦合关系的存在性和影响度进行了分析,并设计了差别化耕地保护经济补偿模式.研究结果表明：① 农户生计资产存在属性差异和空间分异.农户生计总资产呈现由自给型纯农户到非农户递增的总体趋势,空间上存在海拔越高生计资产越低的趋势.② 农户对耕地保护经济补偿模式的选择意愿存在随农户生计资产差异由“成都模式”向“佛山模式”过渡的趋势,不同地带农户模式选择意愿存在空间分异.③ 农户生计资产差异与耕地保护补偿模式选择间存在耦合关系,自然资产与农户模式选择意愿呈负相关,社会资产对农户的模式选择影响最小,金融资产对农户模式选择的影响较弱,人力资产和物质资产对农户决策均产生较显著影响,心理资产对农户的决策影响最为显著.④ 根据农户生计资产缺乏情况为7 种类型农户设计了概念性的补偿模式体系,并就补偿方法、补偿依据、补偿标准和补偿资金来源问题进行了探讨.     

青藏高原东部山地农牧区生计与耕地利用模式

利用分层随机抽样、参与式农村评估及其工具、地块调查、数理统计等方法,对63个农户、272个地块进行了系统的调查与取样,研究了青藏高原东部山地农牧区金川县克尔马村的生计多样化与耕地利用模式。结果表明:①不同类型农户的生计策略选择、组合及收入不同,生计多样化,引入并扩大非农活动是当地生计策略的发展趋势,但不利的自然环境和社会经济条件以及农户自身素质共同影响了生计和土地利用的可持续性;②各种生计策略对土地利用的影响不同,主要影响土地利用类型和土地利用集约化水平;③以非农活动为主的生计多样化可能是该区构建可持续生计的核心,同时也是实现土地可持续利用的根本途径。     

贫困山区农户人力资本对生计策略的影响研究——以四川省凉山彝族自治州为例

人力资本是构建农户生计的关键要素,从人力资本视角探讨农户生计选择对于推动农户生计转型、实现乡村振兴具有重要意义。论文以西南贫困山区四川省凉山彝族自治州为案例区,采用2018年508个农户样本数据,应用回归模型,估算了人力资本对农户生计策略的影响。结果表明：人力资本是山区农户生计选择的重要影响因素,不同类型人力资本对农户生计策略的影响不同,且具有明显的空间差异。教育文化、健康状况对非农生计策略的选择具有正向影响,且高山区>二半山区>河谷区,健康状况对河谷区农户生计选择影响不显著;非农技能培训对非农生计策略选择具有显著的正向影响,且高山区>二半山区>河谷区;农业技能培训对非农生计策略选择具有负向影响,且高山区<二半山区<河谷区,但其对高山区农户生计选择并不显著;青壮年劳动力倾向于选择非农生计,务农人口老龄化问题严峻,高山区表现最为突出,二半山区次之,河谷区较不明显。最后,根据研究结论,探讨了人力资本、劳动力转移与乡村发展之间辩证关系及相关政策建议。     

重庆市山区农户耕地转入特征及其影响因素

耕地流转有利于缓解耕地撂荒和闲置问题,促进土地规模化经营,但已有山区的研究侧重耕地转出,且未深入分析农户耕地转入的特征.本文运用重庆市“两翼”地区12 个典型村的1015 份农户调查问卷,从地块尺度详细分析了农户耕地转入的特征,并通过Tobit 模型,定量分析了农户转入耕地面积的影响因素.结果表明:①农户多无偿转入耕地,但仍主要转入质量好、坡度小、离家近的地块;因受地形影响,转入地块又多为旱地,且难灌溉、面积小,并存在“去粮化”和粗放化经营.②农户特征方面,转入耕地的农户多为普通农户,经营耕地规模小、效益低,且地块细碎化程度高.③影响因素方面,农业劳动力比例、农业收入、农具数量和耕作面积对农户转入耕地面积有显著正向影响,而户主年龄、地块平均面积和地区哑变量则武隆县有显著负向影响.