【摘要】 为了探索旱地小麦(Triticum aestivum L.)增产新途径,在渭北旱塬东部设置了小麦不同行距试验。结果表明,行距10、17、13 cm处理667 m2产量分别为231.7、229.2、225.8 kg,极显著高于20和23 cm。从群体结构上看,不同行距处理冬、春分蘖数无明显差异,但成穗数窄行距显著高于宽行距,单株穗数、千粒重也高。拔节期窄行距处理总分蘖数、4叶以上分蘖数和次生根数均高于宽行处理。抽穗期土壤水分测定结果表明,窄行距处理表土层高出宽行距2.3~3.3个百分点,耕作层高出3.4~4.6个百分点。从抗倒性上看,窄行距处理均无倒伏现象,随着行距的加宽倒伏愈加严重。更多还原

【Abstract】 In order to explore new ways of dryland wheat production in east of Weibei plateau, this test was set. The results showed that the yield of 10,17,13 cm row spacing treatment were 231.7 kg/667 m2,229.2 kg/667 m2 and 225.8 kg/667 m2, significantly higher than 20 and 23 cm row spacing treatment. As far as population structure was concerned, the winter equinox tiller numbers had no obvious difference in different row spacing treatments, but spike number, ear number per plant and1000 grain weight of narrow row spacing were significantly higher than wide row spacing. In jointing process, the total tillers,the above 4 leaves tiller number and the number of secondary roots of narrow spacing were higher than that of wide spacing.At heading stage soil moisture of narrow row spacing was higher than that of wide row spacing by 2.3-3.3 percentage points in layers of topsoil, and by 3.4-4.6 percentage points in tillage storey. From the perspective of lodging resistance, narrow row spacing treatments had no lodging. Lodging became more serious with the increase of row space.更多还原