Effects of Different Nitrogen Supply and Irrigation Methods on Spatial-temporal Distribution of Soil Nitrate Nitrogen during Maize Growth

被引：0

作者：

Qi D. ^{[1
]}

Hu T. ^{[1
,2
]}

机构：

[1] College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, 712100, Shaanxi

[2] Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, Shaanxi

来源：

Hu, Tiantian (hutiant@nwsuaf.edu.cn) | 1600年 / Chinese Society of Agricultural Machinery卷 / 48期

关键词：

Irrigation method; Maize; Nitrogen supply method; Soil nitrate nitrogen; Spatial-temporal distribution;

D O I：

10.6041/j.issn.1000-1298.2017.02.037

中图分类号：

学科分类号：

摘要：

A field experiment was conducted to investigate the effect of varying supply methods of nitrogen and irrigation on dynamics and distribution of soil nitrate nitrogen during maize (Zay mays L., cv. Gold northwestern 22) growth in Northwest China. Irrigation methods included alternate furrow irrigation (AI), fixed furrow irrigation (FI) and conventional furrow irrigation (CI). Nitrogen supply methods included alternate nitrogen supply (AN), fixed nitrogen supply (FN) and conventional nitrogen supply (CN), which were applied at each irrigation. Maize rows were established in west-east direction. Soil nitrate nitrogen content in south and north of the plant was measured in 0~100 cm soil depth (20 cm as an interval) before planting and at 6 collars, 12 collars, tasseling, filling and maturity stages. The results showed that spatial-temporal distribution of soil nitrate nitrogen in south and north of the plant was influenced more by varying methods of nitrogen supply and irrigation compared with that under the plant, so did that in 0~40 cm soil depth compared with that in 40~100 cm. At filling stage, soil nitrate nitrogen of irrigated side was moved down to 60~100 cm soil depth for FI coupled with FN when nitrogen and water were applied within the same furrow, and that of non-water supply side was gathered in 0~40 cm soil depth for FI coupled with FN when nitrogen and water were applied to different furrows. Compared with CI, AI reduced soil nitrate nitrogen under the plant in 40~80 cm soil depth by 9.9%~14.4% for different nitrogen supply methods. Compared with the other treatments, AI coupled with CN or AN maintained soil nitrate nitrogen in 0~40 cm soil depth for a longer time during maize growth. Soil residual nitrate nitrogen in 0~100 cm soil depth at harvest was comparable between AI coupled with CN and AI coupled with AN, and the residual of them was reduced by 11.7%~27.3% compared with those of the other treatments. Therefore, alternate furrow irrigation coupled with conventional or alternate nitrogen supply brought a relatively reasonable spatial-temporal distribution of soil nitrate nitrogen during maize growth, and lowered soil residual nitrate nitrogen at harvest. © 2017, Chinese Society of Agricultural Machinery. All right reserved.

引用

页码：279 / 287

页数：8

共 26 条

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