深松和翻耕对旱地小麦花后根系衰老及产量的影响

为了解深松耕作对小麦根系衰老及产量的影响,以济麦22为材料,通过田间试验,对深松与翻耕条件下旱地小麦花后根系部分生理指标以及籽粒产量进行了比较分析。结果表明,与翻耕处理相比,深松处理小麦花后根系能够保持较高的超氧化物歧化酶活性与硝酸还原酶活性,丙二醛含量较低,可溶性蛋白含量降低缓慢,说明深松处理能够减缓根系的衰老。深松处理的小麦穗数、穗粒数、千粒重高于翻耕处理,其中穗粒数增加达到显著水平,是深松处理增产的主要原因。

Effect of Subsoiling Tillage and Ploughing Tillage on the Root Senescence after Anthesis and Yield of Wheat in Dry land

The effect of subsoiling tillage and ploughing tillage on the root senescence after anthesis and yield of wheat was studied with Jimai 22 as the test material during 2009-2010 in dry-land condition.The results showed that the activity of superoxide dismutase(SOD) enzyme and nitrate reductase(NR) of wheat roots in the subsoiling tillage treatment were higher than that of in the ploughing tillage treatment.And the content of malondiadehyde(MDA) in the subsoiling tillage treatment was lower than that of in the ploughing tillage treatment.And the content of soluble protein decreased slowly after anthesis in the subsoiling tillage treatment.This indicated that the subsoiling tillage could delay the senescence of wheat root system.The spike number,grain number per spike and thousand grain weights of wheat in the subsoiling tillage treatment were higher than that of in the ploughing tillage treatment,and there was significant difference in the grain number per spike between them,so the subsoiling tillage was benefit to gain higher yield.