深松与翻耕对旱地小麦花后根系干重及产量的影响

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

摘要: 通过田间试验，研究了深松和翻耕2种耕作方式对旱地小麦花后根系干重及产量的影响。结果表明，上层土壤(0 cm~20 cm)根系干重及占个时期总根重比重翻耕耕作处理大于深松处理；深层土壤(20 cm~100 cm)中小麦根系的分布深松的重量要比翻耕处理的大；深层土壤(20 cm~100 cm)中根系干重占各时期根重的比重比翻耕处理的高，同时深松处理的籽粒产量中来自灌浆期的增加比重要大于翻耕处理的，这样有利于提高穗粒数，从而提高旱地小麦产量。

Abstract: 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.