一、太湖地区水稻土(黄泥土)的基本物理条件土壤作为植物生长的一个多孔介质,可以区分为两个相互联系的部分。一是固相物质的组成和性质,它包括矿质颗粒、有机物质、溶质以及土壤生物等;另一是由于固相颗粒的不同排列所形成的孔隙大小和分配。其中进行着水、气、热以及营养物质的不断变 First, the basic physical conditions of paddy soil (yellow soil) in the Taihu Lake Soil as a porous plant growth, can be divided into two interrelated parts. The first is the composition and properties of solid phase materials, which include mineral particles, organic matter, solutes and soil organisms; the other is due to the different size and distribution of the solid particles formed by the pore size. Among them are water, gas, heat and nutrients that are constantly changing