论文部分内容阅读
采用盆栽试验，研究土壤水分与水稻秧苗根系形态建成的关系。试验结果表明：在苗体组成中，土壤水分对根系影响最大；秧苗单株发根数与土壤含水量呈线性回归，单株潜伏根数与土壤含水量呈单峰曲线变化关系。该试验土壤含水量ｘ（％）的取值区间（２２．７，３１．４）为旱育秧最适土壤水分含量范围。在此范围内，旱育秧比湿润育秧有较高的发根效率、较大的单株发根体积和根系吸收表面积。旱育秧移栽后所表现的诸多生长优势均首先得益于根系生长良好。旱育秧的过程实质上是为本田积累原始根系的过程。
Pot experiment was conducted to study the relationship between soil moisture and the root morphology of rice seedlings. The results showed that the soil moisture had the most significant effect on the root system. The root number per plant and the soil water content showed a linear regression, and the number of latent roots per plant and soil water content showed a single peak curve. The range of soil water content x (%) (22.7,31.4) is the optimum range of soil moisture content for dry cultivation. Within this range, dry nursery seedling had higher rooting efficiency, larger rooting volume and root absorption surface area than wetting seedling. Many of the growth advantages demonstrated after transplanting of dry nursery seedlings benefit first from the good growth of the root system. The process of drought nursery seedlings is essentially the process of accumulating primitive roots for Honda.