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  • 土壤容重对作物有什么影响?
  • 本站编辑:浙江国清环保科技有限公司发布日期:2018-07-17 13:59 浏览次数:

土壤修复

单位容积土壤(包括孔隙)的质量,叫做土壤容重,单位为克厘米3。土壤的质量是指在105~110℃条件下的土壤烘干重。土壤容重的数值大小,受质地、结构性和松紧度等的影响而变化。一般来说,沙土的孔隙粗大,但数目较少,总的孔隙容积较小,容重较大;反之,黏土的孔隙容积较大,容重较小;壤土的情况,介于两者之间。但是,如果壤土和黏土的团聚化良好,形成具有多级孔隙的团粒,则孔隙度显著增大,容重则相应地减少。土壤越疏松(特别是翻耕后),或是土壤中有大量的根孔、小动物穴或裂隙,则孔度大而容重小;反之,土壤越紧实则容重越大。所以,表土层(或耕层)的容重往往比心土层和底土层小。
The mass per unit volume of soil (including porosity) is called soil bulk density, which is 3 centimeters per gram. Soil quality refers to soil drying at 105~110 C. The magnitude of soil bulk density is affected by texture, structure and tightness. Generally speaking, the pore size of sandy soil is large, but the number is small, the total pore volume is smaller and the bulk density is larger. On the contrary, the pore volume of clay is larger and the bulk density is smaller, and the condition of loam is between the two. However, if the aggregate of loam and clay is well formed, the porosity will increase significantly and the bulk density will decrease correspondingly. The looser soil (especially after tillage), or a large number of root holes, small animal holes or fissures in the soil, has large pore size and small bulk density, and conversely, the greater the soil density, the greater the bulk density. Therefore, the bulk density of the topsoil (or plough layer) is often smaller than that of the core and bottom soil.
一般来说,沙质土壤的容重变化于1.2~1.8克/立方厘米,黏质土壤的容重变化于1.0~1.5克/立方厘米;耕地土壤的耕层土壤容重变化于1.05~1.35克/立方厘米,耕地土壤的底土和紧实的耕层土壤容重变化于1.55~1.80克/立方厘米
Generally speaking, the bulk density of sandy soil varies from 1.2~1.8 gram / cubic centimeter, the bulk density of clay soil varies from 1.0~1.5 gram to cubic centimeter, and the soil bulk density of cultivated soil varies from 1.05~1.35 gram / cubic centimeter, and the soil bottom soil and tight plough soil bulk density change to 1.55~1.80 g / cubic centimeter.
土壤容重是影响作物生长的十分重要的基本数据。容重小,表明土壤疏松多孔,结构性良好,适宜作物生长;反之, 容重大,则表明土壤紧实板硬、缺少团粒结构,对作物生长有不良影响。一般来说,旱作土壤的耕层容重在1.1~1.3克/立方厘米的范围内,能适应多种作物生长发育的要求。对于沙质土壤适宜的容重值宜高些,而对富含腐殖质的土壤则可适当低一些。
Soil bulk density is a very important basic data affecting crop growth. The bulk density is small, which indicates that the soil is porous and porous and has good structure and is suitable for the growth of crops. On the contrary, the capacity of the soil is important, which indicates that the soil is hard and the soil structure is short of the aggregate, which has a bad effect on the growth of the crops. Generally speaking, the soil bulk density of dry land is within the range of 1.1~1.3 grams / cubic centimeter, which can meet the requirements of the growth and development of many crops. For sandy soil, the suitable bulk density should be higher and the humus rich soil should be lower.