Arable Land Evaluation Based on the Household Land Use Behavior in Daxing District of Beijing
基于农户土地利用行为的北京大兴区耕地质量评价

Due to the large food need, arable land quality is very important in China, so how to evaluate its quality has been studied by many researchers. However, different regions of China are at different stages of development with different land use objectives. The first is yield maximization stage, and the household land use objective is to meet family food consumption needs. The second is yield and profit optimization stage, and the household land use objective is to make more profits on the basis of meeting basic family needs. The third is profit maximization stage, and profit is the only land use objective for the household. Based on the theory of different development stages and land use objectives, a "Pressure-Status-Effect-Response" model was developed in this paper to evaluate arable land quality at household level.The arable land quality index system evaluation was constructed according to the frame of "PSER" and Daxing District of Beijing was taken as a case study area. The household questionnaire survey and soil survey were done to get the data about change of household land use and soil fertility. The indicator of Pressure, Status, Effect and Response was studied based on the arable land index system. The result showed that the arable land Pressure indicator increased from 63.19 in 1982 to 73.57 in 2000, and decreased from 73.57 in 2000 to 67.85 in 2006, the variance of arable land Pressure indicator increased from 13.92 in 1982 to 41.12 in 2000, and up to 58.59 in 2006; the Status indicator of arable land increased from 56.82 in 1982 to 76.46 in 2000 and up to 81.20 in 20006, the variance of arable land status indicator increased from 58.39 in 1982 to 111.42 in 2000 and up to 209.45 in 2006; the indicator of arable land effects increased from 42.39 in 1982 to 64.34 in 2000, but it was stable in 2006. The arable land indicator change from 1982 to 2000 and 2006 showed that the arable land quality was affected by the government policy, the government introduced "the household responsibility system" policy to increase the household input level, due to the poor arable land quality before 1982; with the introduction of the household responsibility system, the arable land quality increased from 1982 to 2000, but the arable land quality variance increased because of the household land input difference; the arable land quality kept stable from 2000 to 2006, but arable land quality variance increased quickly. The new government policy of the household land scale must be introduced to increase the arable land quality as general.