红花草就是紫云英,是一种很受广大稻农欢迎的水田绿肥作物。其鲜草养分高,一般含氮量0.45%、五氧化二磷0.10%、氧化钾0.35%,其鲜草作早稻基肥,特别是二季稻的肥效作用更显著。红花草留籽应做到以下三点: (一)红花草是无限花序,成熟有先后。当整棵内有近80%的果荚呈黑褐色、顶花基本凋谢了就要及时收割。 (二)最好是晴天收割,但在红花草种植普遍的长江流域及其以南地区,往往收获期阴雨绵绵,因此,要做好两种天气 Red flowers is the milk vetch, is a very popular rice paddy green manure crops. Its fresh grass nutrients, the general 0.45% nitrogen, phosphorus pentoxide 0.10%, 0.35% potassium oxide, its fresh grass for early rice basal fertilizer, especially the second-crop rice effect is more significant. Safflower leaves should do the following three points: (A) is an infinite inflorescence of inflorescence, mature has. When nearly 80% of the whole pod was dark brown, the top flowers of the basic wilting must be harvested in time. (B) It is best to harvest in sunny days. However, in the common areas of the Yangtze River and its southern areas where safflower is planted, it is often overcast and rainy. Therefore, it is necessary to make two kinds of weather