Abstract:

In order to effectively use water rainfall and irrigation water, in wheat-maize rotation area of south Shanxi in 2011-2012, a field experiment was conducted to study water-requiring, consumption properties, water use efficiency and grain yield by different irrigation time (450 m3/hm2) and straw returning treatments. The results showed that, soil water storage was W0 < W1 < W2 < W3, soil water consumption was W0 > W1 > W2 > W3, total water consumption exhibited W0 < W1 < W2 < W3, WUE exhibited W2 > W3 > W1 > W0 and grain yield represented W3 > W2 > W1 > W0 under different irrigation. WUE represented jointing water > winter water > filling water under different stages irrigation. Grain yield and WUE had the same order S > N under same irrigation. Based on comprehensive consideration of grain yield, soil storage, water consumption and water use efficiency, winter water + jointing water and straw returning treatment was a better mode to realize unified between water saving and high-yield.