论文部分内容阅读
四川盆地位于四川省东部海拔800米以下,属亚热带气候,是全省粮、棉、油主要产区,也是人口集居之地.耕地面积占全省耕地总面积的60%以上.本区树少林稀,森林覆被率不到7%,与该区农业生产发展和人民生活要求极不适应.尤其盆地中部,农业人口和耕地均占全省的三分之一以上,而有林地面积仅约三百万亩,无林地四百余万亩,林业不能对农业起到保障作用,因而近年来自然灾害频繁,水土流失严重,“四料”(木料、燃料、肥料、饲料)奇缺,特别是干旱,严重地威胁农业生产的高产稳产.
The Sichuan Basin is located in the eastern part of Sichuan Province at an altitude of 800 meters below sea level and belongs to a subtropical climate and is the main producing area of grain, cotton and oil in the province as well as a place where people live inhabited. The cultivated area accounts for over 60% of the total arable land in the province. Shaolin thin, forest cover rate of less than 7%, and the development of agricultural production in the area and people’s living requirements extremely suited.Especially in the central basin, agricultural population and cultivated land accounted for more than one-third of the province, while the forest area only About three million mu of land and no more than four million mu of non-woodland land, forestry can not play a safeguard role in agriculture. As a result, natural disasters have been frequent and soil and water loss have been grave in recent years. However, “four materials” (lumber, fuel, fertilizer and feed) Especially drought, seriously threaten the high and stable yield of agricultural production.