Effects of Nitrogen Fertilization on Yield and Nitrogen Utilization of Film Side Planting Rapeseed (Brassica napus L.) Under Different Soil Fertility Conditions

文献类型： 外文期刊

第一作者： Tian, Xiaoqin

作者： Tian, Xiaoqin;Li, Zhuo;Liu, Yonghong;Tian, Xiaoqin;Li, Zhuo;Liu, Yonghong;Tian, Xiaoqin;Li, Zhuo;Liu, Yonghong;Zhao, Yani;Chen, Zuying

作者机构：

关键词： Rapeseed; Nitrogen fertilization; Film side planting; Yield; Nitrogen use efficiency

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.9； 五年影响因子：3.9 ）

ISSN： 0718-9508

年卷期： 2023 年 23 卷 1 期

页码：

收录情况： SCI

摘要： Film side planting (FS) is a new water-saving and drought-resistant technology in dryland of southwest China, and nitrogen (N) is a main yield factor. However, the optimal N amount for FS rapeseed is unknown, especially in different soil fertility. Field experiments with N amounts (0, 60, 120, 180, 240, 300, and 360 kg ha(-1)) for FS rapeseed arranged in four soil fertility levels (divided into < 0.5 t ha(-1), 0.5 similar to 1.0 t ha(-1), 1.0 similar to 1.5 t ha(-1), and > 1.5 t ha(-1) based on the 5-year average rapeseed yield of not fertilizing, named respectively by F1, F2, F3, and F4) were conducted to analyze N utilization and yield. Besides, relationship between yield and N amounts was also discussed. The lower the soil fertility, the higher N amounts achieving high yield. Dry matter, N accumulation, N use efficiency, N agronomic efficiency, and effective pods were greatest for 360, 300, 240, and 180 kg ha(-1) under F1, F2, F3, and F4 respectively. Eventually, 360, 300, 240, and 180 kg ha(-1) obtained 27.31 similar to 242.32%, 35.26 similar to 129.44%, 15.92 similar to 142.00%, and 15.79 similar to 109.65% significantly greater yield than other N treatments under F1 and F2 (except 360 kg N ha(-1)) and F3 and F4 (except 240 kg N ha(-1)) respectively. Based on yield-N production function, the maximum rapeseed yields were obtained for F1 at > 360 kg ha(-1) N, for F2 at > 360 kg ha(-1) N, for F3 at 312 kg ha(-1) N, and for F4 at 272 kg ha(-1) N. Therefore, the optimal N amount for FS rapeseed under low soil fertility was 360 kg ha(-1) or more and under high soil fertility was 272 similar to 312 kg ha(-1).

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