论文部分内容阅读
提出地膜棉田生态系统由土体层、膜下层、植被层和近地大气层四个子系统组成。其中膜下层具有独立的组成、边界、生态特征和特殊的、不可替代的功能，是地膜棉田特有的子系统。地膜棉田生态系统内的物质、能量交换方式由直链式变成双环式。还认为膜下层的反光作用使植被层有效辐射量增加是地膜棉生育进程加快的重要原因。
It is proposed that the cotton field ecosystem consists of four sub-systems of soil layer, sub-layer, vegetation layer and near-field atmosphere. Among them, the subfamily has its own composition, boundary, ecological characteristics and special and irreplaceable functions, which are the unique subsystems of cotton membrane. Membrane cotton ecosystem within the material and energy exchange from the straight chain into a double loop. It is also considered that the reflecting effect of the lower layer of the membrane makes the effective radiation amount of the vegetation layer increase, which is an important reason for the accelerated growth of the cotton membrane.