川西地区退耕还林(草)成效调查与再决策

Investigation of Returning Farmland to Forest or Grass Land and Decision Remaking for Reforestation

以川西干旱河谷地区某县为例,对退耕还林的成果进行了调查分析。结果表明,一些农业生产力高的土地和坡度小的耕地也纳入到退耕地中,主要与耕地地块分散,距离农户居住地远和水源不方便等情况有关。退耕还林是一个长期的、复杂的、逐步实施的过程,必须对当地自然条件和人文条件做深入了解和调查。只有综合各种原则和因素、分清楚轻重缓急,才能制定出适合当地的合理的退耕还林规划方案。

The effects of returning farmland to forest or grass land were investigated with the support of GIS and GPS technology. Some important conclusions can be drawn according to the results from the investigation. A certain number of lands with high soil fertility and small slope degree were reforested in returning farmland to forest or grass land. Such a phenomenon occurred mainly due to dispersed farmlands, distant cultivation locations and inconvenient irrigation conditions. The authors suggested that reforestation is a long-term complicated systematic engineering, and should be performed step by step.