Effect of Subsoiling Tillage and Ploughing Tillage on Root Dry Weight after Anthesis and Yield in Dry-Land Wheat

The effect of subsoiling tillage and ploughing tillage on root dry weight after anthesis and yield had been studied in open dry-land wheat. The result showed that the root dry weight and the proportion of total root weight in the upper soil (0 cm - 20 cm) on the ploughing tillage treatment were higher than that in the subsoiling treatment; Subsoiling can promote the root to spread in deep soil (20 cm - 100 cm) for dry-land wheat and increase the root dry weight in the deep soil. The root dry weight account for the proportion of total root dry weight in subsoiling treatment was higher than that of in the ploughing tillage. And the grain yield in the proportion from the filling period for the subsoiling was bigger than that of in the ploughing tillage. Subsoiling tillage was benefit to increase the number of kernels and gained higher yield in dry-land wheat.