论文部分内容阅读
当前,为解决人们对粮食生产日益增长的需要,除靠扩大种植面积和提高单产外,通过改革耕作制度,增加复种指数,也是提高农作物产量的一项有效措施。增加复种指数,实行多熟栽培,已在各国农业生产中占有重要地位,亚、非、拉广大地区很早就盛行以间套复种为中心的多熟栽培制度,在农业历史较长、热量和水分条件适宜的地方,多熟种植已是一种普遍种植形式,以一季为主的美国及欧州
At present, in order to solve the people’s growing needs for food production, it is also an effective measure to increase the crop yield by reforming the farming system and increasing the multiple cropping index by expanding the planting area and raising the yield. The increase of the multiple cropping index and the practice of multi-cultivation have played an important role in the agricultural production of various countries. The multi-cultivation system centering on inter-cropping is widely prevailed in the vast areas of Asia, Africa and Latin America. With a long history of agriculture, Suitable water conditions, multi-crop cultivation is a common form of cultivation, mainly to the United States and Europe in one season