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Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (33): 94-101.doi: 10.11924/j.issn.1000-6850.casb16070075

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Effect of Different Irrigation Treatments on Growth Characteristics, Yield and Water Use Efficiency of Hybrid Millet

  

  • Received:2016-07-13 Revised:2016-11-01 Accepted:2016-09-20 Online:2016-11-25 Published:2016-11-25

Abstract: The aim is to supply scientific evidence for water- saving high efficiency of‘zhangzagu’. The experiment was conducted in Xuanhua Station of Zhangjiakou Academy of Agricultural Science (115°3ˊN, 40°63''E) in 2014.‘Zhangzagu 3’was used as material. Four irrigation treatments were set up: (1) no irrigation in the whole season of hybrid millet (T0), (2) irrigation at jointing stage (T1), (3) irrigation at jointing and heading stage (T2), (4) irrigation at jointing, heading and grain filling stage (T3). The changing laws of growth, yield and WUE of hybrid millet under different irrigation conditions were discussed. The results revealed that: (1) plant leaf water potential in grain filling stage was improved by 0.04-0.31 Mpa under the condition of irrigation, the individual plant height and biomass were increased by 21.1-34.05 cm and 2675.07-4103.88 kg/hm2 under irrigation, respectively; (2) compared with that of T0, the yield of T1, T2 and T3 was improved by1256.36 kg/hm2, 2155.62 kg/hm2, 2105.93 kg/hm2 under irrigation, espectively; (3) WUEy of T1, T2 and T3 was increased by 9.33%, 19.2%, 14.88% compared with that of T0, respectively, WUEy was positively correlated to yield. The conclusions are drawn as: (1) it will be an optimal way for improving yield and WUEy through 2 times irrigation at joining and heading stage of‘Zhangzagu 3’in dry year; (2) the increase of yield and WUEy under irrigation mainly comes from the improvement of biomass and WUEbm.

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