有些农户在准备作物地膜栽培的薄膜用量时,经常出现不多就少的情况,怎样合理计算地膜的亩用量呢?下边介绍一点这方面的知识。地膜的亩用量(公斤),是由地膜的比重(公斤/dm~3),厚度(mm)、覆盖田面积(m~2)和理论覆盖度(％)四项因素所决定。计算方法是:上述四项因素之乘积,再乘以常数100(1m~2=100dm~2)。如果用W表示地膜的亩用量,D表示地膜的比重,H表示地 Some farmers in the preparation of crop film cultivation of the amount of the film, there are often less, how to rational calculation of the amount of acres of plastic film? Here is a little knowledge of this. The amount of mu used in the film is determined by four factors: the specific weight of the film (kg / dm ~ 3), the thickness (mm), the covered area (m ~ 2) and the theoretical coverage (%). The calculation is: The product of the above four factors, and then multiplied by a constant 100 (1m ~ 2 = 100dm ~ 2). If W said that the amount of mulching film, D said the proportion of the film, H said