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我区农田有60％是低产田,土壤有机质含量仅为1％,肥力低。随着农业生产责任制的落实,在人多地少地区草田轮作提高土壤肥力的措施受到一定限制。因此,提倡复播绿肥,既可提高土壤肥力,又可消灭一部分农田杂草。 我区是高寒地区,气温低,无霜期短,低山盆地,河谷地带和山前平原的气候不尽相同。因此,根据不同的气候条件,选择复播绿肥的种类和方式,是提高绿肥产量的关键。 1、复播绿肥的热量条件,我区无霜期为105—160天,春小麦收割期为8月上中旬。麦收后尚有1个月至1个半月生长期可
60% of the farmland in our district is a low-yielding field with only 1% of organic matter in the soil and low fertility. With the implementation of the responsibility system for agricultural production, measures for improving the soil fertility in the rotation of grassland in a small number of places are subject to certain restrictions. Therefore, the promotion of compound green manure can not only improve soil fertility, but also eliminate part of the farmland weeds. My area is alpine area, low temperature, frost-free period is short, low mountain basin, valleys and piedmont plain climate vary. Therefore, according to different climatic conditions, the choice of the type and mode of green plantation replanting is the key to improve the yield of green manure. 1, the heat recovery multicast green manure, my area frost-free period of 105-160 days, spring wheat harvest in August on the middle. Wheat harvest is still 1 month to 1 and a half months of growth can be