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所谓“绿肥”,就是利用绿色植物体作肥料。在一些山青草茂的地区或一般山区和半山区,当春夏草木盛发季节,割取嫩绿的枝叶、山草压青肥田,我们称为“秧青”,实际上就是“野生绿肥”。专门种植作肥料利用的作物,如苕子、紫云英、萝卜角等,就称为“绿肥作物”。利用绿肥是我国农业生产上的优良传统。早在春秋时代的有关历史资料中,就提到了割草能作肥料,也能提高土壤肥力。劳动人民经过多年的生产实践,深刻地认识到绿肥在农业生产中的作用。例如人们都爱称呼苕子一类的绿肥作物为“肥田草”,这就充
The so-called “green manure” is the use of green plants for fertilizer. In some mountainous area or the general mountainous area and the mid-mountain area, when the spring-summer vegetation season, cut the tender green foliage, mountain grass pressure green field, we call “seedling green”, in fact, is “wild green manure.” Specially cultivated crops used for fertilizer, such as prickly heat, milk vetch, radish angle, etc., are called “green manure crops.” The use of green manure is an excellent tradition in China’s agricultural production. As early as the Spring and Autumn Period, the relevant historical data mentioned that mowing can be used as fertilizer and soil fertility. After years of production practice, working people profoundly recognize the role of green manure in agricultural production. For example, people like to call a class of green manure crops as “fat field grass”, which is sufficient