为了明确春甘薯的适宜栽插期以及晚栽为什么减产的原因,我们先后进行过三年试验,在不同插植期和不同土壤温度、不同土壤水分含量的条件下与发根、块根分生组织的发展对块根形成的影响,以及光合产物的分配等与产量的关系,进行了较系统的试验研究。结果证明,春甘薯栽插期在不受霜冻低温影响的前提下,适期早栽增产显著,而插期越晚减产幅度 In order to clarify the suitable planting period of spring sweet potato and the reasons why the late planting reduced production, we have conducted three years of experiments, with different planting time and different soil temperature, soil moisture under different conditions with the hair root, root meristem The development of the root of the formation of tuberous roots, as well as the distribution of photosynthetic products and yield relationship, conducted a more systematic experimental study. The results show that the planting season of spring sweet potato without frost under the premise of low temperature, early planting early yield significantly, but the late cut-off rate of decrease