灌溉定额对膜下滴灌玉米生理性状及产量的影响

通过不同灌溉定额对膜下滴灌套播玉米生理性状及产量指标影响的研究，为套播玉米膜下滴灌栽培技术的应用和推广提供科学依据。在田间试验条件下，设置不同灌溉定额处理3 000 m³/hm²（D1），4 500 m³/hm²（D2），5 250 m³/hm²（D3），6 000 m³/hm²（D4）和6 750 m³/hm²（D5）和常规地面灌（CK）处理，采用随机区组试验设计，研究不同灌溉定额对套播玉米生理性状和产量指标的影响。不同灌溉定额下套播玉米茎粗、株高、叶面积和SPAD值随灌溉定额的增加而增大，表现出D5 > D4 > D3 > D2 > D1，玉米整个生育期高灌溉定额（D5）比低灌溉定额（D1）分别平均提高21.74%，17.36%，18.73%，18.50%；产量及产量构成在一定灌溉定额下（3 000~6 000 m³/hm²）随灌溉定额的增加而增大，超过一定的灌溉定额（> 6 000 m³/hm²）对玉米的产量及产量构成无显著提高。膜下滴灌条件下，南疆套播玉米灌溉定额在5 250~6 000 m³/hm²内比较合适。

Effect of Irrigation Quota on Physiological Characteristic and Yield in Drip Irrigation under Mulch of Maize

A study on physiological characters and yield index of maize by the different irrigation quota in drip irrigation under mulch was conducted in order to provide scientific basis for application and popularization of drip irrigation under film in maize. The effect of different irrigation quota 3 000 m³/hm² (D1), 4 500 m³/hm² (D2), 5 250 m³/hm² (D3), 6 000 m³/hm² (D4), 6 750 m³/hm² (D5)] and routing irrigation (CK) on the physiological characters and yield index were studied by random block experiments in the field experiment. In different irrigation quota, stem diameter, height, leaf area and SPAD of maize increased with irrigation quota, as showed that D5 > D4 > D3 > D2 > D1, and high irrigation quota increases by 21.74%, 17.36%, 18.73% and 18.50% averagely than low in the whole growth period of maize. Yield and yield component of maize increased with irrigation quota in the certain irrigation quota (3 000~6 000 m³/hm²),but it insignificantly increased over 6 000 m³/hm². In the drip irrigation under mulch, it was an appropriate irrigation quota in the range from 5 250 to 6 000 m³/hm² of interplanting corn in the southern region of Xinjiang.