关键词: 松材线虫病疫木, 松材线虫病疫木, 安全利用, 坑木

Abstract:

In recent years, large migration from rural to urban areas coupled with the natural growth of urban population, the demand for urban land is very strong; In addition, with the economic development, urban fixed asset investment increased year by year, resulting in strong demand for urban land use in various sectors of society. The migration of population and government investment play an important role in urban sprawl. To prevent the extensive urban sprawl, this study analyzed the pressure mechanism of the population and fixed asset investment that led to the urban expansion, and built a demand model that could estimate construction land. Based on the data of 2004-2008, the reasonable scale of Qianjiang town was obtained by using P-S-R model, and the extensive expansion of the town was prevented. The increments of Qianjiang construction land was 380.92 hm2.