滴头压力对玉米生长发育及产量的影响

Effect of Emitter Pressure on Growth and Yield in Maize

为研究不同滴头压力对玉米生长发育及其产量的影响。基于大田试验,研究4个滴头压力水平对滴灌玉米生长的影响。结果表明：灌后不同时间滴头压力为0.03 MPa处理的玉米叶绿素SPAD值均为最高;滴灌玉米抽雄期和成熟期整株生物量均随着压力减少而呈现单峰增长趋势,抽雄期各处理整体生物量呈现0.04 MPa处理〉0.02 MPa处理〉0.03 MPa处理〉0.05 MPa处理,成熟期各处理整体生物量呈现0.03MPa处理〉0.04 MPa处理〉0.05 MPa处理〉0.02 MPa处理;滴头压力为0.03 MPa的处理产量最高,显著高于0.05 MPa处理和常规种植,增产幅度分别为20.3%和21.0%。可见,滴头压力0.03-0.04 MPa对于北疆膜下滴灌玉米生长过程较为有利。

Through the field experiments,the effects of the hydraulic characteristic of emitter on growth and yield of maize were studied.The results showed that chlorophyll SPADvalue of maize under 0.03 MPa pressure condition of emitter was the highest after irrigation various times.The whole plant biomass of maize in tasseling and maturity were showed a single peak growth trends with the pressure to reduce.The whole plant biomass of maize in tasseling was showed 0.04MPa〉0.02MPa〉0.03 MPa〉0.05 MPa.The whole plant biomass of maize in maturity was showed 0.03MPa〉0.04MPa.0.05MPa〉0.02 MPa.The yield of maize under pressure 0.03 MPa conditions emitter was the highest.Compared to 0.03 MPa and CK,maize yield under pressure 0.03 MPa conditions emitter was increased significantly by 20.3% and 21.0%respectively.