基于熵权-TOPSIS的滴灌春玉米灌水定额研究

为准确得到适宜于北疆地区滴灌春玉米的灌水定额，设置了W₁(225 m³/hm²)、W₂(300 m³/hm²)、W₃(375 m³/hm²)、W₄(450 m³/hm²)、W₅(525 m³/hm²)、W₆(600 m³/hm²) 6个水平的灌水定额，研究灌水定额对春玉米生长发育和产量的影响。选取部分生长指标、产量指标、节水指标作为评价指标，结合耗水规律和指标显著性进行分析，并采用熵权-TOPSIS综合评价法，优选适宜于北疆地区滴灌春玉米的灌水定额。结果表明：滴灌春玉米的关键生育期为抽雄散粉期，该生育期最优灌水定额为525 m³/hm²;耗水量和耗水强度...

Irrigation quota of drip-irrigated spring maize based on entropy weight-TOPSIS

In order to obtain an accurate irrigation quota suitable for drip-irrigated spring maize in the northern Xinjiang, six levels of irrigation quotas of W₁ (225 m³/hm²), W₂ (300 m³/hm²), W₃ (375 m³/hm²), W₄ (450 m³/hm²), W₅ (525 m³/hm²) and W₆ (600 m³/hm²) were set to study the effect of irrigation quotas on growth and yield of spring maize. Some growth, yield and water-saving indices were selected as evaluation indices to analyze the law of water consumption and significance of different indices, then the entropy weight-TOPSIS comprehensive evaluation method was used to optimize the irrigation quota suitable for drip-irrigated spring maize in the northern Xinjiang. The results show that the key fertility period for drip-irrigated spring maize is the tasseling pollen period, and the optimal irrigation quota for this period is 525 m³/hm²; the growth rate of water consumption and intensity of water consumption decreases significantly after the irrigation quota reaches 525 m³/hm². According to the significance analysis of each index, the irrigation quota of 450-525 m³/hm² is more suitable for the growth of spring maize in the northern Xinjiang. The results of the comprehensive entropy weighted-TOPSIS evaluation show that the highest closeness and the best evaluation results can be achieved when the irrigation quota is 525 m³/hm², at which time the maize yield is about 16, 178.71 kg/hm². Therefore, we recommend 525 m³/hm² as the optimal irrigation quota for drip-irrigated spring maize in the northern Xinjiang.