不同生育阶段灌水处理对糜子农艺性状及产量的影响

在年降雨量不足40 mm的甘肃省敦煌市，以陇糜10号为指示品种，研究了不同生育阶段灌水处理对糜子主要农艺性状及产量的影响，应用灰色关联度法分析了主要农艺性状与产量的相关性。结果表明：水分亏缺延迟糜子成熟，延长了拔节至抽穗阶段的生长发育天数；生育期内任何阶段水分亏缺都降低了糜子株高、千粒重和产量，主穗长缩短，主茎粗变细，抽穗灌浆期水分亏缺极显著地影响单株穗重、单株粒重及单位面积穗数。不同土壤水分条件下，糜子单株粒重、单株穗重、千粒重、株高、主茎粗、主穗长、单位面积穗数都与糜子产量相关性较大。

Effect of irrigation on agronomical traits and yield of broomcorn millet at different growing stages

With Longmi10 as test cultivar, effect of irrigation treatment at different growing stages on main morphological characteristics and yield of broom-corn millet was studied at DunHuang city with an annual rainfall less than 40 mm. The results showed that both the broomcorn millet maturation and the period from jointing stage to heading stage were prolonged under deficit irrigation. The plant height, 1000 grains weight, and grain yield were reduced, the main spike length was shortened, and main stem diameter was decreased. In addition, spike weight, grain weight, and spike number were materially affected by water deficit at heading and filling stages. There existed positive correlati on between grain weight, panicle weight, plant height, main stem diameter, main panicle length, spike number, and grain yield under different soil water conditions.