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四川旱地约占耕地一半,旱地中70%是坡耕地,多分布在山区和丘陵上部,集中表现为土壤干旱缺水,土层薄,结构差,肥力低,冲刷侵蚀严重,复种程度低,作物产量低而不稳。为了提高这一部分低产旱地生产水平,提高土壤保土保肥保水能力,减少水土流失,我所从1984年以来,在旱坡耕地上定点定位进行多熟、轮作、少耕综合技术配套措施研究.在改造坡耕地上收到明显的生态效益与经济效益。作法(一)改单作两熟为带状间套,四种四收四川盆地具备间套多熟的气候条件,过去在大部分土薄缺水的旱坡耕地上,主要种植豌豆(小麦)—甘薯(花生、绿豆),一般年总产量300—400公斤。经改为中厢(167厘米)对半
Sichuan dry land accounts for about half of the cultivated land, 70% of the dry land is sloping farmland, mostly distributed in the mountainous area and the upper part of the hilly area. The concentrated area is characterized by soil drought and water shortage, thin soil layers, poor structure, low fertility, serious erosion and erosion, Low yield and unstable. In order to increase the production of this part of low-yielding dry land, increase soil water retention capacity and reduce soil erosion and water loss, we have conducted a series of research on comprehensive techniques for multi-cropping, rotation and tillage on arid slopes since 1984. In the transformation of sloping land received significant ecological and economic benefits. Practices (A) to make a single as a double-cooked for the inter-band sets, four kinds of Sichuan Basin with four sets of multi-cooked climatic conditions, in the past most of the dry land of thin dry land, the main planted peas (wheat) - sweet potato (peanuts, green beans), the general annual output of 300-400 kg. The car was changed to mid-plane (167 cm) half