烤烟的叶数和叶重,是构成单位面积产量的重要因素。要增加叶数就要有一定的株数,要提高叶重就要叶大质优。这是高产栽培技术上所必须认真解决的问题。过去,一般采用双行种烟法,如种得过密,株数虽多,但烟叶薄,病害重,产量不高;但种得疏的,则因株数少而叶数少,亩产也不高。为解决群体与个体正常生长发 Flue-cured tobacco leaf number and leaf weight, is an important factor in yield per unit area. To increase the number of leaves there must be a certain number of plants, it is necessary to improve the leaf mass Ye superior quality. This is a problem that must be seriously solved in high-yielding cultivation techniques. In the past, the commonly used double row tobacco method, such as the seed is too dense, although the number of strains, but the thin tobacco leaf, heavy disease, the yield is not high; but sparse, then the number of plants due to fewer and fewer leaves, high. To address the normal growth of groups and individuals hair