一、绪言向绿色肥库索取粮棉,大力提倡种植绿肥,广辟肥源,这是力争作物高产的有效方法之一。我国劳动农民的多年实践与科研试验征明,绿肥的特点:来源多,生长快,产量高,质量好,成本低,在应用上极其广泛,是一种富合氮素的有机肥源。现在全国各地正在积极响应政府号召,普遍推广种植。南方各省栽培苕子、紫云英、黄花苜蓿(南苜蓿)等豆科绿肥与水稻输作,已有悠久的历史了。绿肥可以就地施用,不但可以和作物实行输作、间作、混作或套作,荒坡、隙地、田头、地边,也皆可充分利用。这样既可以减少运输,节省劳力, I. INTRODUCTION Obtain grain and cotton from the Green Fertilizer Store and vigorously promote the planting of green manures and broaden the sources of fertilizers. This is one of the effective ways to strive for a high yield of crops. Many years of practice and scientific research of laborers in our country demonstrate that green manures are characterized by many sources, fast growth, high yield, good quality and low cost. They are extremely versatile in application and are a nitrogen-rich organic fertilizer source. Now throughout the country are actively responding to government calls for widespread promotion of cultivation. Southern provinces cultivate prickly ash, milk vetch, alfalfa (southern alfalfa) and other legumes and paddy rice, has a long history. Green manure can be applied locally, not only with the crop transplanting, intercropping, mixing or intercropping, barren slopes, open spaces, fields, land, also can make full use of. This will not only reduce transport, save labor,