| 引用本文: | 邵志远,蒋 静,张 毅,等.不同灌水和施氮处理对燕麦产量、耗水特性和土壤盐分的影响[J].灌溉排水学报,2022,41(5):84-89. |
| SHAO Zhiyuan,JIANG Jing,ZHANG Yi,et al.不同灌水和施氮处理对燕麦产量、耗水特性和土壤盐分的影响[J].灌溉排水学报,2022,41(5):84-89. |
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| 摘要: |
| 【目的】揭示盐碱地区不同灌水和施氮处理对燕麦耗水特性、产量及土壤盐分的影响。【方法】以坝莜18号裸燕麦为研究对象，开展盆栽试验，试验设W1（120%ET）和W2（100%ET）2个灌水水平，N0（0）、N1（70 kg/hm2）、N2（140 kg/hm2）、N3（210 kg/hm2）4个施氮水平，探究不同灌水和施氮处理下的燕麦产量、耗水特性和土壤盐分的响应。【结果】W1灌水水平与N2施氮水平可显著（p<0.05）提高燕麦的耗水量与产量，同时水分利用效率随之增大。增施氮肥会导致土壤盐分增加；W1灌水水平更有利于淋洗土壤中的盐分，降低土壤盐分累积风险。N2处理的氮肥农学利用效率和燕麦产量最大，分别为2.9 kg/kg和1 079.0 kg/hm2。【结论】灌水量和施氮量为120%ET和140 kg/hm2时，土壤含水率和电导率分别保持在22.02%~23.39%和2.24~3.03 dS/m，既能提高水氮利用效率，又能取得较佳的燕麦产量。 |
| 关键词: 水氮调控；燕麦；耗水特性；产量；土壤盐分 |
| DOI：10.13522/j.cnki.ggps.2021577 |
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| The Combined Effect of Irrigation and Nitrogen Application on Yield, Water Consumption of Oat and Soil Salinity |
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SHAO Zhiyuan, JIANG Jing, ZHANG Yi, ZHANG Chaobo
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1. Taiyuan University of Technology, Taiyuan 030024, China;
2. Houma city Fengcheng Township People’s Government, Linfen 041000, China
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| Abstract: |
| 【Objective】 Irrigation and fertilization are essential to safeguarding crop yields, but they have detrimental impacts on the environment and could result in soil salinization. The objective of this paper is to study the effects of different combinations of irrigation and nitrogen application on water consumption, yield of oat , as well as soil salinity.【Method】The experiment was conducted in pots repacked with soil taken from a saline-alkali area, with the Bayou No.18 cultivar used as the model plant. The experiment consisted of two irrigation amounts: 120% (W1) and 100% (W2) of the evapotranspiration, and four nitrogen applications: 0 (N0), 70 kg/hm2 (N1), 140 kg/hm2 (N2), and 210 kg/hm2 (N3). In each treatment, we measured the yield, water consumption of the oat, as well soil salinity of each pot. 【Result】W1 and N2 significantly (p<0.05) increased water consumption, oat yield, and water use efficiency. Increasing nitrogen application led to an increase in soil salinity. W1 was more effective in leaching salt and reducing salt content in the root zone. The agronomic use efficiency and yield of nitrogen fertilizer were the highest in N2, reaching 2.9 kg/kg and 1 079.0 kg/hm2, respectively.【Conclusion】Irrigating 120% of ET combined with 140 kg/hm2 of nitrogen fertilization can maintain soil water content and electrical conductivity at 22.02%~23.39% and 2.24~3.03 dS/m, respectively. They improved the use efficiency of irrigation water and the nitrogen fertilizer, thereby increasing the oat yield. |
| Key words: water-nitrogen coupling; oat; water consumption; yield; soil salinity |
