冬季绿肥紫云英,在我省粤北连县有悠久的栽培历史。但由于当地留种产量低而费工多,同时,留种后的稻田,早造产量较低,所以农民不重视留种自给,多靠外地供应种子。至于其他地区,近年来才开始种植紫云英,1961年冬种紫云英面积迅速扩大,产量显著提高,一般亩产鲜茎叶三、四千斤,高的达六、七千斤。但缺乏留种经验,种子产量不高,一 Winter Green Shi Weiyun, with long history of cultivation in the province of northern Guangdong even. However, because of the low local production and the heavy labor costs, at the same time, the amount of paddy fields left behind after planting is low as early as possible. Therefore, peasants do not attach importance to subsistence and depend more on the supply of seeds from the outside. As for other areas, the cultivation of Astragalus began in recent years. The area of ​​Astragalus mongolica in the winter of 1961 expanded rapidly with a remarkable increase in output. Generally, there were three or four kilos of fresh stems and leaves per acre and a high of six or seven kilos. However, the lack of remaining experience in seed production is not high, one