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一、土壤孔性土壤孔性,指的是土壤固体颗粒之间的孔隙数量(孔隙度)和孔隙的搭配情况。孔隙可容纳水分和空气,水分和空气又决定着土壤的热量和养分的释放状况,水分和空气充足而协调,热量和养分释放就好,反之则差。因此,为了使土壤有足够的水分、空气、热量和有效养分来满足作物的生长发育需要,就要有良好的土壤孔性。要知道土壤孔性,必须了解土壤比重、容量、孔隙度和孔隙类型。(一)土壤比重:是一定体积的土壤(不包括水和空气)重量与同体积水的重量之比。土壤比重的大小主要决定于土壤的物质组成,尤其是矿物组
First, the porosity of soil Porous soil, refers to the number of pores between the soil solid particles (porosity) and pore with the situation. Pore can accommodate water and air, moisture and air and determines the release of soil heat and nutrients, water and air sufficient and coordination, heat and nutrients release is good, and vice versa. Therefore, in order to make the soil have enough moisture, air, heat and effective nutrients to meet the needs of crop growth and development, it is necessary to have good soil porosity. To know the porosity of a soil, one must understand the soil’s specific gravity, its capacity, its porosity and pore type. (A) the proportion of soil: a certain volume of soil (excluding water and air) and the weight of the same volume of water weight ratio. The proportion of soil mainly depends on the size of the soil material composition, especially the mineral group