| Cite this article: | 戴嘉璐,李瑞平.基于投影寻踪聚类评价模型的河套灌区玉米灌溉施肥模式优选[J].灌溉排水学报,0,():-. |
| Dai jialu,Li ruiping.基于投影寻踪聚类评价模型的河套灌区玉米灌溉施肥模式优选[J].灌溉排水学报,0,():-. |
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| Optimization of maize fertilization model in Hetao irrigation area based on projection Pursuit cluster evaluation model |
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Dai jialu, Li ruiping
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School of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University
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| Abstract: |
| 【Objective】To explore the effects of different irrigation fertilization on corn yield, water use efficiency and nitrogen fertilizer partial productivity. 【Method】 this study by setting low water (1800 m3/hm2) and water (2250 m3/hm2), high water (2700 m3/hm2), low fat (300 kg/hm2), fat (375 kg/hm2), high fat 9 (450 kg/hm2) processing, and to the local irrigation water and fertilizer field experiments for control treatment (CK), research the corn yield and water use efficiency under different processing, get appropriate hetao irrigation area of maize growth fertigation system. 【Result】The results showed that the water consumption of corn increased with the increase of irrigation water and fertilizer amount.Although water consumption and yield of CK reach the maximum compared with 9 treatments, water use efficiency and nitrogen fertilizer are not high. Compared with CK, water use efficiency and partial productivity of nitrogen fertilizer increased by 22.2% and 53.5%, respectively, which were better than those of other treatments.The evaluation results of projection pursuit cluster (RAGA-PPCE) based on genetic algorithm showed that irrigation water of 2700 m3/hm2 and fertilization of 375 kg/hm2 were the optimal combination of water and fertilizer, which were more suitable for the irrigation fertilization system in the study area. 【Conclusion】Irrigation water of 2700 m3/hm2 and fertilization of 375 kg/hm2 are conducive to the stable yield of corn and the efficient use of water and fertilizer in Hetao irrigated area, providing theoretical reference for realizing the rational allocation of water resources in Hetao irrigated area and guaranteeing the sustainable development of agricultural production in Hetao irrigated area. |
| Key words: irrigation;fertilization;maize;production;water use efficiency;nitrogen fertilizer is more productive |
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