红壤水分条件对花生萌发出苗及地上部生长动态的影响

Red soil moisture influence on peanut germination emergence and growth

用室内培养和田间测坑试验结果 :红壤的花生萌发和出苗土壤含水量分别为 0 18g/ g和 0 2 4g/ g ,土壤低于萌发含水量时 ,种子处于低级萌发阶段 ,出苗率为 0 ;土壤含水量在萌发含水量与出苗含水量之间时 ,种子只处在高级萌发阶段 ,不能出苗 ;土壤高于出苗含水量种子才能出苗 ,但出苗率并不随土壤水分的增加而增加 ,最适出苗含水量为 0 3 0g/ g。长期低土壤水分对花生的株高、分枝数、叶片数及单叶面积均有不利影响 ,在苗期就有明显表现 。

Peanut germination,emergence and plant length,tillering,leaves per hole and leaf areas were studied under different red soil moisture by culturing in lab and planting in pit plots The red soil water content for peanut germination and emergence was 0 18 g/g and 0 24 g/g respectively When the soil moisture was less than the germination water content,peanut seeds were at the high seed stages without emergence Emergence occurred only when the soil water content was higher than emergence water content Emergence rate did not increase with the increase of soil moisture The optimum red soil water content for peanut seed emergence was 0 30 g/g Results also showed that lasting low soil moisture had heavy influence on the plant length,tillerings,leaves per hole and leaf area