[Effects of regulated deficit irrigation on water consumption characteristics and water use efficiency of winter wheat].
[Effects of regulated deficit irrigation on water consumption characteristics and water use efficiency of winter wheat].
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发表时间：
2009-11
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通讯作者：
Zhan-Jiang Han;Zhen-wen Yu;Dong Wang;Xi-zhi Wang;Zhenzhu Xu
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作者：
Zhan-Jiang Han;Zhen-wen Yu;Dong Wang;Xi-zhi Wang;Zhenzhu Xu
以高产冬小麦品种冀麦22为试验材料，在山东兖州进行了调亏灌溉对该品种耗水量和水分利用效率的影响试验。设置了播种期、拔节期、开花期土壤相对含水率分别为80%、65%和65%(W0)、80%、70%和70%(W1)、80%、80%和80%(W2)、90%、80%和80%(W3)和90%、85%和85%(W4)的5个处理。在生长季降水量为228 mm的条件下，W1、W4处理的总耗水量高于W0、W2、W3处理，W1、W4处理间差异不显著。与W4相比，W1处理降低了0-200 cm土层的储水量，降低了小麦拔节至开花期的耗水量，但增加了开花至成熟期的耗水量。W4处理拔节至开花、开花至成熟期耗水率较高。在调亏灌溉条件下，W0处理水分利用效率较高，但产量最低。其他处理的水分利用效率随灌水量的增加呈先上升后下降的趋势。W1和W4处理的耗水量和产量均最高，且W1处理的灌水利用效率和灌溉效益均高于W4处理，是本研究中高产节水的最佳灌溉制度。
With the high-yielding winter wheat cultivar Jimai 22 as test material, a field experiment was conducted in Yanzhou of Shandong to examine the effects of regulated deficit irrigation on the water consumption and water use efficiency (WUE) of the cultivar. Five treatments were installed, i.e., the soil relative moisture content at sowing, jointing, and anthesis stages being 80%, 65% and 65% (W0), 80%, 70% and 70% (W1), 80%, 80% and 80% (W2), 90%, 80% and 80% (W3), and 90%, 85% and 85% (W4), respectively. Under the condition of 228 mm precipitation in growth season, the total water consumption was higher in treatments W1 and W4 than in treatments W0, W2, and W3, and no difference was observed between treatments W1 and W4. Comparing with W4, treatment W1 decreased the water storage in 0-200 cm soil layer and the water consumption by wheat from jointing to anthesis stages, but increased the water consumption from anthesis to maturity stages. The water consumption rates at the stages from jointing to anthesis and from anthesis to maturity in treatment W4 were higher. Under regulated deficit irrigation, treatment W0 had higher WUE, but the grain yield was the lowest. The WUE in other treatments increased first, and then decreased with increasing irrigation amount. Both the water consumption and the grain yield were the highest in treatments W1 and W4, and treatment W1 had higher irrigation water use efficiency and irrigation benefit than treatment W4, being the best irrigation regime of high-yielding and water-saving in our study.