论文部分内容阅读
豫南稻区稻田主要轮作方式:1、紫云英—水稻;2、小麦—水稻。第一种方式一年两作,一粮一肥,有用有养,粮食单产较高而稳定,一般亩产七、八百斤,但复种指数太低,年亩产不高。第二种方式,一年稻麦两熟,复种指数较高,但用田多,养田少,年亩产也不高,年产与第一种方式相近。鉴于上述两种轮作方式的缺点,从提高土壤肥力增加粮食产量考虑,我们想从改制入手,把绿肥纳入轮作中,并进行了“粮肥轮作”的研究。
South of rice paddy fields in South China The main rotation: 1, aspen - rice; 2, wheat - rice. The first method is to grow crops for one year and two crops, one grain and one fat, useful and well-fed. The grain yield is high but stable. Generally, the yield per mu is seven or eight kilos. However, the multiple cropping index is too low and the annual yield per mu is not high. The second way, one year rice and wheat two crops, multiple crop index higher, but with more fields, less cultivated fields, the mu per year is not high, with an annual output similar to the first way. In view of the shortcomings of the above two modes of rotation, from the perspective of improving soil fertility and increasing grain yield, we would like to start with restructuring and incorporate green manure into crop rotation and carry out research on “crop rotation”.