| 摘要: |
| 【目的】为探究不同灌溉施肥对玉米产量、水分利用效率和氮肥偏生产力的影响。【方法】本研究通过设置低水(1800 m3/hm2)、中水(2250 m3/hm2)、高水(2700 m3/hm2),低肥(300 kg/hm2)、中肥(375 kg/hm2)、高肥(450 kg/hm2)9个处理,并以当地灌水量和施肥量为对照处理(CK)的田间试验,研究不同处理下玉米产量和水肥利用效率变化规律,得到适宜河套灌区玉米生长的灌溉施肥制度。【结果】研究结果表明：玉米耗水量随灌水量和施肥量的增加而增加。尽管CK耗水量和产量与9个处理相比达到最大值,但其水分利用效率和氮肥偏生产力并不高。高水中肥处理与CK相比减产4.1%且为各处理中的最小值,水分利用效率和氮肥偏生产力较CK分别提高22.2%、53.5%,与其他处理相比为较优值。基于遗传算法的投影寻踪聚类(RAGA-PPCE)评价结果表明灌水2700 m3/hm2、施肥375 kg/hm2为最优水肥组合,为研究区较适宜的灌溉施肥制度。【结论】灌水2700 m3/hm2、施肥375 kg/hm2有利于河套灌区玉米稳产和水肥高效利用,为实现河套灌区水资源的合理配置保障河套灌区农业生产的可持续发展提供理论参考。 |
| 关键词: 灌溉;施肥;玉米;产量;水分利用效率;氮肥偏生产力 |
| DOI： |
| 分类号:S275.3 |
| 基金项目:国家自然科学基金项目(51839006) |
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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 |
