前言野生的植物之所以能在自然界很好地生长发育,是因为其茎叶枯萎后,可在土壤微生物的作用下,由腐朽物变成腐植质,最后转化成植物营养的缘故。然而,农作物只有依靠先进的耕作技术才能在有限的耕地中生产出更多的农产品。但是,只重视省力化、机械化、多肥化(化肥)等农业技术的改进,又不能避免土壤的恶化、地力的减退等 Introduction The reason why wild plants grow and develop well in nature is that their stems and leaves can be transformed into humic substances under the action of soil microorganisms after the wilt of stems and leaves and finally into plant nutrition. However, only by relying on advanced farming techniques can crops produce more produce in limited arable land. However, emphasis should only be given to the improvement of agricultural technologies such as labor-saving, mechanization, and more fertilizers (fertilizers), and the deterioration of soil and the decline of soil fertility can not be avoided