摘要
大田试验设１１个水分处理，包括不灌溉（对照）和灌１、２次水，灌溉时期分别为春小麦三叶期、拔节期、抽穗期和开花期．试验结果表明：三叶期灌溉的４个处理消除了苗期水分亏缺，通过提高小穗数和穗粒数而明显增产．说明在半干旱旱地农业区，当土壤水分不足，降水偏少时应提前到春小麦苗期灌溉，而非拔节—抽穗期（小麦生理需水关键期）．
The field trial was done in Dingxi including 11 treatments with no irrigating (control) and irrigating one or two times at the seedling, jointing, heading and blooming stages of spring wheat. The result showed that the 4 treatments irrigating at the seedling stage of spring wheat eliminated the soil water deficit at the seedling stage, increased the yield obviously by increasing the rate between spikelets and spike and the rate between kernels and spike. So it shows that in the semiarid regions, irrigating at the seedling stage of spring wheat is more effective than that at the jointing stage (the physiological critical stage of water requirement of wheat) when soil water is deficit and the precipitation is insufficient.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
1996年第3期121-126,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金
甘肃省中青年科学基金
关键词
旱地
春小麦
灌溉
水分亏缺
补偿效应
semiarid regions dryland spring wheat irrigation water deficit
