棉花的营养生长是生殖生长的基础,没有良好的营养生长,夺取棉花高产就无从实现。从一粒小小的棉种长成一棵丰产棉株,在它短短的一生中,需要通过根系日以继夜地吸收水分、养分和茎枝的上下输导以及大量叶片日积月累的光合作用,才能使干物质数量有上千倍的增长。下面我们就来研究一下这个赖以积累干物质的营养生长过程。为了便于说明问题,还是 Vegetative growth of cotton is the basis of reproductive growth, there is no good vegetative growth, to seize the high yield of cotton can not be achieved. From a small cotton grow into a high-yielding cotton plant, in its short life, you need to absorb moisture through the roots day and night, up and down the nutrients and stems up and down the guide and a large number of blades of accumulated photosynthesis in order to make dry There is a thousand-fold increase in the quantity of matter. Now let’s examine the vegetative growth process that accumulates dry matter. In order to explain the problem, or