辽西半干旱区播种期对春小麦生长发育·产量和耗水规律的影响

[目的]为了保障和提高半干旱区春小麦(Triticum aestivum Linn.)粮食生产,增强春小麦对旱情的抵御能力。[方法]研究不同播种期对春小麦生长和耗水规律的影响,通过作物形态指标、产量和水分利用效率等确定半干旱区春小麦适宜播种期。[结果]随着播种期的推迟,春小麦生育期缩短,苗期最为明显;叶面积指数、千粒重和全生育期耗水量等均随着播种期的延迟而减小,早播产量和灌溉水利用系数显著高于其他处理,分别达到6 907.5 kg/hm2和6.2 kg/m3。[结论]建议在辽西半干旱区采用适时早播种植春小麦。

Effect of Sowing Date on the Growth and Development and Water Consumption Law of Spring Wheat(Triticum aestivum Linn.)

[Objective] In order to increase the food production and enhance the ability to resist drought disaster in semiarid area.[Method] Effects of sowing date on growth and water consumption of spring wheat were studied in this paper and according to the responding of crop growth,yield and irrigation water use efficiency,the appropriate sowing date were proposed.[Result] The results showed that as the sowing date delayed,life period was reduced,leaf area index,thousand-grain weight and total water consumption also decreased;the yield and irrigation water use efficiency of early sowing reached 6 907.5 kg/m2 and 6.2 kg/hm3,respectively,which were both significantly larger than the others.[Conclusion] Early sowing is suggested in semi-arid area of western Liaoning Province.