自力更生繁殖足够的绿肥种子,是大力发展绿肥的前提。生产实践证明,红花草和苕子在我区各地都可以留种,种子产量也相当高。但按照过去区外资料,红花草的留种田,有不少地方只能种一季晚稻,或者早稻因迟插,每亩减收100—150斤。过去区内的全州、兴安、灌阳等地,苕子留种田的水稻也往往每亩减收100斤左右。因此,既要抓好绿肥留种,又要使绿肥留种田的水稻稳定增产,这是生产上极需注意的问题。 Rely on enough to reproduce green manure seeds, is to vigorously develop green manure premise. Production practice has proved that safflower grass and prickly heat in all parts of my area can stay species, seed yield is quite high. However, according to past outside the area information, the remaining cultivation of safflower grass, there are many places can only grow a quarter late rice, or early rice due to late plug, reduced by 100-150 pounds per mu. In the past, there were Jeonju, Xingan, Guanyang and other places in the area, and the rice kept by the Shizi-subsistence farming was often reduced by about 100 kg per mu. Therefore, it is necessary to do a good job of keeping green manures and steadily increase the output of green manure to keep the farm, which is a problem that needs attention in production.