数字农科院2.0

Growth and nitrogen productivity of drip-irrigated winter wheat under different nitrogen fertigation strategies in the North China Plain

文献类型： 外文期刊

作者： Sunusi Amin ABUBAKAR;Abdoul Kader Mounkaila HAMANI;Guang shuai WANG;Hao LIU;Faisal MEHMOOD;Abubakar Sadiq ABDULLAHI;Yang GAO;Ai wang DUAN

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关键词： drip fertigation;nitrogen use efficiency;split nitrogen strategies;water use efficiency;wheat yield

期刊名称： Journal of Integrative Agriculture

ISSN： 2095-3119

年卷期： 2023 年 22 卷 3 期

页码：

收录情况： SCIE（2023版） ; ; CSCD（2023-2024年度） ; ; 科技核心（2023版） ; ; 农林核心（2020版）

摘要： Excessive application of nitrogen (N) fertilizer is the main cause of N loss and poor use efficiency in winter wheat (Triticum aestivum L.) production in the North China Plain (NCP). Drip fertigation is considered to be an effective method for improving N use efficiency and reducing losses, while the performance of drip fertigation in winter wheat is limited by poor N scheduling. A two-year field experiment was conducted to evaluate the growth, development and yield of drip-fertigated winter wheat under different split urea (46% N, 240 kg ha−1) applications. The six treatments consisted of five fertigation N application scheduling programs and one slow-release fertilizer (SRF) application. The five N scheduling treatments were N0–100 (0% at sowing and 100% at jointing/booting), N25–75 (25% at sowing and 75% at jointing and booting), N50–50 (50% at sowing and 50% at jointing/booting), N75–25 (75% at sowing and 25 at jointing/booting), and N100–0 (100% at sowing and 0% at jointing/booting). The SRF (43% N, 240 kg ha−1) was only used as fertilizer at sowing. Split N application significantly (P<0.05) affected wheat grain yield, yield components, aboveground biomass (ABM), water use efficiency (WUE) and nitrogen partial factor productivity (NPFP). The N50–50 and SRF treatments respectively had the highest yield (8.84 and 8.85 t ha−1), ABM (20.67 and 20.83 t ha−1), WUE (2.28 and 2.17 kg m−3) and NPFP (36.82 and 36.88 kg kg−1). This work provided substantial evidence that urea-N applied in equal splits between basal and topdressing doses compete economically with the highly expensive SRF for fertilization of winter wheat crops. Although the single-dose SRF could reduce labor costs involved with the traditional method of manual spreading, the drip fertigation system used in this study with the N50–50 treatment provides an option for farmers to maintain wheat production in the NCP.

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