土壤作为自然体占有三维空间,不仅有面上的延伸,而且有垂直方面的发展,从而构成土层的厚度。通常人们谈到影响作物产量的土壤因素时,往往比较注意肥力。无庸置疑,土壤肥力因素与作物生理需要的谐调是高产的关键,然而肥力因素——水分、养分、空气、热量的发挥,在一定程度上又为土层厚度及其层次组合状况所干预,尤其遇到天早缺水、短肥等特殊情况,土层状态对作物生育及产量的作用就显得十分突出,这也就是好田好土稳产、高产和差田劣土低产欠收的原因之一。我省广泛分布于石灰岩上的石卡拉土,就其土质而言属于上乘,色黑灰,多团粒结构,土质疏松肥美,油润,因此那怕 As a natural body occupies three-dimensional space, not only the extension of the surface, but also the vertical development, which constitutes the thickness of soil. Often when people talk about soil factors that affect crop yields, they often pay more attention to fertility. There is no doubt that the key to high yield is the harmony between soil fertility and crop physiological needs. However, the fertility factors - water, nutrients, air and heat, intervene to a certain extent for the thickness of the soil layer and its level combination, Encountering early water shortages, short stubbles and other special circumstances, the state of the soil fertility and crop yield is very prominent, which is good good soil and good yield, poor yield and bad soil one of the reasons for low yield owed . The province is widely distributed in the limestone on the stone khala soil, in terms of their soil is superior, dark gray, multi-aggregate structure, loose soil fertile, oil, so even afraid