贫困山区农户兼业现象普遍,对相关的土地利用活动影响深刻。采用重点与随机抽样、参与式农村评估和景观格局分析等方法,从微观尺度定量分析了云阳县568户农户兼业行为与居民点用地形态变化的相互关系,可为土地利用结构调整、居民点用地整理挖潜提供认识依据。结果表明:(1)云阳县农户兼业现象普遍,依据非农收入与农业收入差、非农劳动投入比重,将农户划分为纯农业型、农业主导型、农工兼具型、非农主导型、非农业型五种兼业类型;(2)老龄和女性人口少、且平均文化水平较高的农户兼业水平最高,人口数量多、分工多元化的农户兼业水平居中;(3)以农业生产为主要生计活动的纯农业型与农业主导型农户,居民点用地规模变化较小,约为180m²,土地利用粗放且多样化程度高,其中,纯农业户圈养与堆棚用地比重较高,农业主导型院坝用地比重较高;(4)农工兼具型农户的居民点用地规模扩大,约为190m²,土地利用集约度得到提高,且多样性下降,堆棚用地弱化,住房用地占主导;(5)逐渐退出农业生产的非农主导型与非农业型农户,居民点用地规模缩减,约为160~130m²,土地集约度较高,多样性下降,居民点中生产性用地比重下降、居住性用地比重上升。研究认为,农村居民点整理挖潜必须与农户的兼业需求相适应。

The rural households have been increasingly taking part in diverse production activities apart from farming in poor mountain areas, which has a great impact on their land-use activities. Taking Yunyang County of Chongqing as a case study, we employed a Participatory Rural Appraisal method to investigate randomly selected 568 households and analyzed the spatial distribution of their rural housing land by using a landscape pattern analysis. The results show that the concurrent business level of rural households was high in Yunyang County. First, according to the ratio of off-farm income to the total income and the proportion of off-farm workforce inputs, we classified rural households into five groups: full-farm, farm-dominated, half-farm, non-farm-dominated and non-farm households. We find that the lower proportion of the elderly or women the households have and the higher education they get, the higher concurrent business level they will be. However, households with multiple divisions of work and a big family size tend to be at the middle stage of concurrent business. Of full-farm and farm-dominated households, the housing land area per family is relatively high, about 180 m², which indicates extensive landuse utilization. Compared with the farm-dominated households, full-farm households themselves used a large proportion of land for rearing livestock and storing groceries except for housing. The residential land of half-farm households increases by approximately 190 m² per family, indicating a relatively intensive and less diverse residential land use. For half-farm households, they reduce the land of storing and increase the land of living to enlarge their housing land. As for non-farm-dominated and non-farm households who almost drop all their farming activities, the residential land area per family tends to be lessened, about 160 to 130 m², which means a more intensive but a less diverse land use pattern. The causes are that the land used for agricultural production decreases, and the decreased land of producing is less than the expanded land of living. As a consequence, the study suggests that the adjustment or arrangement of housing land should be fit to the concurrent business needs of households.