论文部分内容阅读
草木樨、沙打旺、苜蓿和紫穗槐都是很好的牧草、绿肥作物,各有特点。我们应根据种植的目的,以及种植场地的土质和水分条件,合理安排这几种牧草、绿肥作物,做到因地种植。草木樨、沙打旺、苜蓿和紫穗槐的共同点:1.属豆科植物,有根瘤,能固定空气中植物不能直接吸收的氮素。据测定,1亩地草木樨的根瘤菌可固定17.3斤氮,相当于86斤硫铵的含氮量。1亩5年生的苜
Meadow clogs, Astragalus adsurgens, alfalfa and Amorpha fruticosa are good forages, green manure crops, each with its own characteristics. We should reasonably arrange these kinds of pasture and green manure crops according to the purpose of planting and the soil and water conditions at the planting site so that we can grow them on the ground. The common features of plants such as Radix Astragali, Radix Astragali, Medicago sativa and Amorpha fruticosa: 1. It is a leguminous plant with nodules and can fix the nitrogen that plants can not directly absorb in the air. It has been determined, 1 mu of Rhizobia of licorice can fix 17.3 kg of nitrogen, equivalent to 86 kg of ammonium sulfate nitrogen content. 1 acre of 5-year-old alfalfa