论文部分内容阅读
利用时间、空间或作物品种间科学的、合理的搭配,在同一块耕地上一年种收一季以上作物的种植方式,称为复种、套种或间作。作物复种指数(%)或增加的种植指数,国际上用公式(全年作物播种面积耕地面积-1)×100%表示。根据这一定义,我国通用的复种指数实际上指的是种植指数(Cr...
The use of time, space or crop varieties between the scientific and reasonable mix of the same piece of cultivated land for more than a quarter of crops received more than one crop planting, known as multiple cropping, intercropping or intercropping. Crop multiplication index (%) or increased planting index, the international formula (annual acreage of cultivated land area -1) × 100% said. According to this definition, China’s common multiple crop index actually refers to the planting index (Cr ...