冀东地区冬小麦春季不同灌水处理的效应研究

在冀东地区对冬小麦春季不同灌水处理效应进行了研究。结果表明:多水处理的叶面积指数一直高于少水处理,且叶面积指数下降平缓。子粒最大灌浆速率出现的时间随灌水次数的增加而推迟。每公顷穗数、穗粒数、千粒重随灌水次数的增加而增加。四水、三水、二水处理的产量极显著高于一水和旱处理的产量,但四水、三水、二水处理产量之间没有显著差异。灌溉水利用效率随灌水次数的增加而下降。从高产、节水出发,冀东地区小麦春季灌水方案为在越冬水的基础上,春季灌拔节期、孕穗期两次水。

Studies on Effects of Irrigation Systems in Spring on Winter Wheat in Eastern Area of Hebei

The effects of irrigation systems in spring on winter wheat were studied in eastern area of Hebei. The results showed that many times irrigation was more than few times irrigation in the leaf area index, slower in the decreasing of leaf area index, later in the time of the maximum rate of grain filling. With the increasing of irrigation times in spring, the spike number per hectare, grain number per spike, 1000 grains weight increased. The grain yields of 4 times, 3 times and 2 times irrigation were extreme significantly higher than that of one times and no irrigation, but the difference of grain yields among 4 times, 3 times and 2 times irrigation was not significant. However, the water use efficiency of irrigation declined with increasing of irrigation times in spring. For the higher-yield and water-saving, the spring irrigation system of winter wheat in eastern area of Hebei should be that 2 times irrigation were respectively conducted at jointing stage and at booting stage on the basis of irrigation at winter.