Suitable Strategy of Water-Nitrogen Management for Surge-Root Irrigation of Jujube in China

文献类型： 外文期刊

第一作者： Dai, Zhiguang

作者： Dai, Zhiguang;Fei, Liangjun;Li, Ping;Chen, Lin;Zhong, Yun;Dai, Zhiguang;Li, Ping

作者机构：

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2018 年 110 卷 4 期

页码：

收录情况： SCI

摘要： Jujube (Ziziphus jujuba Mill.) is an economic tree with high tolerance to environmental stresses. Surge-root irrigation (SRI) is a new technology of micro-irrigation which is especially suitable for the irrigation of economic trees. A 2-yr field experiment was conducted in the Loess Plateau of China that included three levels of soil water content (SWC): 60-85%theta (W-1) (mass water content, simplified as %theta), 50-75%theta (W-2), and 40-65%theta (W-3); and four levels of N: 0.75 (N-1), 0.50 (N-2), 0.25 (N-3), and 0.00 kg plant(-1) (N-4). For both years, the LAI gradually increased with the increase of N level, and the more N input, the later LAI(max) reached; however, water had no effect on the LAI. Water and N had significant (P < 0.05) effect on the NI, WUE, and ANUE, while the interaction effect of water and N on the WUE and ANUE was significant (P < 0.05), but not on the NI. The maximum NI, WUE, and ANUE were 19.15 kg plant(-1), 3.75 kg m(-3), and 2.21 kg kg(-1) in 2014, and 17.53 kg plant(-1), 4.43 kg m(-3), and 2.88 kg kg(-1) in 2015, respectively. Considering the interaction of water and N on the NI, WUE, and ANUE in 2014 and 2015, the SWC shall be controlled in 50-75%. and the N application rate is 0.42 kg plant(-1), which can be as the suitable strategy of water and N management for the maximum comprehensive benefits of the NI, WUE, and ANUE for jujube under SRI in the Loess Plateau.

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