冬小麦不同播期对土壤水分及产量的影响

在西北半干旱雨养条件下，以冬小麦‘陇中一号’为材料，研究了不同播期条件下土壤水分、产量差异。结果表明：冬小麦适当迟播可以提高土壤含水量，但在不同播期、小麦的不同生育期土壤含水量也存在差异。从4 个不同播期分析，平均土壤含水量为最迟播期（S4，10 月11 日）的最高；产量以最早播期（S1，9 月21 日）的最低，9 月30 日—10 月11 日之间产量相近。多重比较表明，播种期越迟，土壤含水量越大，播期处理间产量差异不显著，晚播不会造成减产。

Effect of Sowing Dates on Soil Moisture and Yield of Winter Wheat

Under semiarid rain-fed condition, winter wheat‘Longzhong No.1’was used to study soil moisture and winter wheat yield under different sowing dates. The results showed that soil water content increased with the late-sowing of winter wheat. There were differences in soil moisture under different sowing dates and growth periods. Among the four sowing dates, the highest soil moisture was found in the latest sowing date (S4, October 11) and the lowest yield was found in the earliest sowing date (S1, September 21). The yield was similar between September 30 and October 11. On the whole, the soil moisture increased with the delay of sowing date. The late-sowing will not lead to the reduction of output.