论文部分内容阅读
分析了西峰站连续四年的作物发育状况和土壤湿度观测资料，得出了麦田蒸散耗水的基本规律。探讨了影响小麦生长发育和产量形成的关键需水期。提出作物耗水特性系数的概念，并以此评判冬小麦各发育期水分的供需状况，得出两年度冬小麦产量偏低的原因在于拔节—成熟期耗水特性系数明显偏小。建议及时灌孕穗水降低不孕小穗率，灌灌浆水提高小麦千粒重。
The crop development status and soil moisture observation data of Xifeng Station for four consecutive years were analyzed, and the basic law of evapotranspiration of wheat field was obtained. The key water requirement period affecting wheat growth and yield formation was discussed. The concept of coefficient of water consumption characteristic of crops was put forward to judge the supply and demand of moisture in each growth period of winter wheat. The reason why the yield of winter wheat was low in two years was that the water consumption coefficient of jointing-maturing stage was obviously smaller. Proposal timely irrigation spike water to reduce the rate of infertility spike, irrigation grouting to improve wheat grain weight.