| 水氮互作对膜下滴灌玉米产量及水氮利用的影响 |
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| 引用本文： | 李玉斌,马忠明.水氮互作对膜下滴灌玉米产量及水氮利用的影响[J].玉米科学,2018,26(2):102-109. |
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| 作者姓名： | 李玉斌 马忠明 |
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| 作者单位： | 甘肃农业大学农学院;甘肃省农业科学院 |
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| 基金项目： | 公益性行业（农业）科研专项（201503125） |
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| 摘 要： | 通过田间裂区试验,研究不同灌水量和施氮量对膜下滴灌玉米生理生长、产量及其构成因素和水、氮利用的影响。结果表明,水氮互作对玉米产量影响差异显著(P0.05)。玉米单株叶面积随着施氮量与灌水量的增加而增大。随着灌水量的增加,玉米耗水量呈上升趋势,玉米水分利用效率呈下降趋势。氮肥农学效率及氮肥偏生产力随着施氮量的增加而减小。当灌水量大于2 700 m~3/hm~2、施氮量大于200 kg/hm~2时,玉米干物质积累和产量不在增加,产量呈下降趋势。在本试验条件下,推荐最佳灌水量为2700 m~3/hm~2,施氮量为200 kg/hm~2。
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| 关 键 词： | 玉米 膜下滴灌 水氮利用 干物质积累 |
| 收稿时间： | 2017/6/15 0:00:00 |
Effect of Irrigation and Nitrogen Amount on Yield, Water and Nitrogen Use Efficiency of Maize under Plastic Mulched Drip Irrigation |
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| LI Yu-bin and MA Zhong-ming.Effect of Irrigation and Nitrogen Amount on Yield, Water and Nitrogen Use Efficiency of Maize under Plastic Mulched Drip Irrigation[J].Journal of Maize Sciences,2018,26(2):102-109. |
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| Authors: | LI Yu-bin and MA Zhong-ming |
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| Institution: | College of Agronomy, Gansu Agricultural University, Lanzhou 730070 and Gansu Academy of Agricultural Science, Lanzhou, 730000, China |
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| Abstract: | Field experiments were conducted to evaluate the influence of irrigation amount and nitrogen rate on field maize production, water and nitrogen use efficiency of maize under plastic mulched drip irrigation. The com-pletely randomized split-plot design was employed with the main plot of water and three replicates in each sup-plot. The result showed that the interactive effects between water and nitrogen was significant for yield of maize(P<0.5), the leaf area per plant increased with the rising of irrigation water and nitrogen amount. There were an increase in water consumption and a decrease in water use efficiency of maize with increasing the irrigation amount, but the ag-ronomic efficiency and nitrogen partial productivity decreased with increasing nitrogen fertilization level. The dry matter and grain yield of maize first increased and then yield decreased with increasing irrigation level and nitrogen rate, 2 700 m3/ha and 200 kg/ha treatment produced the highest grain yield. It was considered that under the experi-mental condition, 2 700 m3/ha irrigation plus 200 kg/ha of nitrogen fertilization was the optimal combination of ob-taining the high yield, water and nitrogen efficiency of maize under plastic mulched drip irrigation. |
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| Keywords: | Maize Mulched drip-irrigated Utilization of water and nitrogen Dry matter accumulation |
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