Effects of Different Irrigation Regime on Yield,Water Consumption and Water Use Efficiency of Winter Wheat

doi:10.7668/hbnxb.2016.S1.003

Abstract

Abstract: In order to relieve the crisis of water resource scarcity in the low plain area,study was conducted in 2012-2013 and 2013-2014 wheat growing seasons in different rainfall years. A split block design was used with 5 different irrigation regimes(1,2,3,4 times irrigation,no irrigation as control,represented by W1,W2,W3,W4 and W0 respectively,and W0 as control) as the main treatments and 3 different types of winter wheat varieties(Hengguan 35,Heng 4399,Shi 4185) as the sub-treatments. The yield,components of water consumption,stage water consumption,water use efficiency(WUE) and irrigation water use efficiency(IWUE) of wheat were analyzed,so as to provide basis for high efficient utilization of water resources.The results showed that the yield increased nonlinearly with the increase of irrigation amount,the highest yields were with 3 irrigations model in 2012-2013(less rainfall) and 4 irrigations model in 2013-2014(more rainfall) respectively,but not significantly different from the yield of 2 irrigation model in 2012-2013,and they were affected by amount and distribution of rainfall.As far as variety was concerned,water response characteristics of different varieties were different. Shi 4185 was comparatively more sensitive to irrigation and Hengguan 35 and Heng 4399 were more tolerant to drought with higher yield at a same irrigation model. As to water use efficiency,they were first increased and then decreased with the amount of irrigation increments,but IWUE always decreased. WUEs of different cultivars were different in two years. WUE of Henguan 35 were highest with 2 irrigation mode,Shi 4185 with 3 irrigation mode and Heng 4399 with 3 irrigation in 2012-2013 and 1 irrigation mode in 2013-2014. The water consumption and water consumption components were affected by irrigation amount and distribution of rainfall,the greater the amount of irrigation,the less proportion of soil water consumed. Stage water consumption varied with rainfall distribution,it was higher in 2012-2013 than 2013-2014 at the jointing to early filling stage and the water consumption component was mainly soil water(2012-2013) and rainfall(2013-2014) respectively.In the low plain area,selecting the irrigation regimes of 2 irrigations was able to take the advantage of both variety yield potential and a higher WUE.

Key words: Winter wheat, Irrigation regime, Yield, Water consumption component, Stage water consumption, WUE

CLC Number:

S365
S272

CAO Caiyun, DANG Hongkai, ZHENG Chunlian, GUO Li, MA Junyong, LI Kejiang. Effects of Different Irrigation Regime on Yield,Water Consumption and Water Use Efficiency of Winter Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(S1): 17-24. doi: 10.7668/hbnxb.2016.S1.003.

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