【摘要】 通过 1 997～ 1 999年在河北省衡水半干旱地区对冬小麦进行耕作、覆盖、底墒和补水灌溉等综合应变防御技术田间试验研究 ,在拔节期以有限水分胁迫效益指标 ( 55% )为依据 ,制定出脯氨酸含量大于 0 .30 g/ 1 0 0 g为小麦受旱的生化指标 ;选取土壤水分、叶面积系数、生物量、补水量、水分利用效率等小麦受旱程度的特征量进行综合分析 ,得出了平均每实施一项抗旱技术 ,可使小麦增产 4.3% ,以深松 +覆盖 +足墒综合配套技术增产效果最明显 ,可增产 2 7.0 % ,水分利用效率达到 2 0 .1 kg/ ( mm· hm2 ) ,其次是深松 +覆盖 +欠墒综合配套技术更多还原

【Abstract】 The study was conducted through the synthetic experiments on different treatments of cultivation, mulching and irrigation for winter wheat crop from 1997 to 1999 in the Hengshui semi arid area, Hebei province. According to the limited water stress efficiency index (55%), the biochemical index of proline content (equal to 0.3 g/hg) was used to judge the winter wheat drought hazard. The integrated analysis on the drought related parameters such as soil moisture, leaf area index, biomass, supplemental irrigation and water use efficiency shows that a yield increase of 4.3% can be obtained averagely by using each drought resistant farming measure. The deep tillage+mulching+ sufficient irrigation treatment turns out to be the most effective method, with a yield increase of 27.0% and water use efficiency of 1.34 kg/mm. The second effective method is deep tillage+mulching+inadequate irrigation treatment.更多还原