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ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Nutrition
Volume 15 - 2024 |
doi: 10.3389/fpls.2024.1413507
Analysis of the beneficial effects of prior soybean cultivation to the field on corn yield and soil nitrogen content
Provisionally accepted- 1 Northeast Agricultural University, Harbin, China
- 2 Independent researcher, Hangzhou, China
Corn-soybean rotation is a cropping pattern to optimise crop structure and improve resource use efficiency, and nitrogen (N) fertilizer application is an indispensable tool to increase corn yields. However, the effects of N fertilizer application levels on corn yield and soil N storage under corn-soybean rotation have not been systematically studied.The experimental located in the central part of the Songnen Plain, a split-zone experimental design was used with two planting patterns of continuous corn (CC) and corn-soybean rotations (RC) in the main zone and three N application rates of 0, 180, and 360 kg hm-2 of urea in the secondary zone. The research has shown that RC treatments can enhance plant growth and increase corn yield by 4.76% to 79.92% compared to CC treatments. The amount of N fertilizer applied has a negative correlation with yield increase range, and N application above 180 kg hm-2 has a significantly lower effect on corn yield increase. Therefore, a reduction in N fertiliser application may be appropriate. RC increased soil N storage by improving soil N-transforming enzyme activity, improving soil N content and the proportion of soil organic N fractions. Additionally, it can improve plant N use efficiency by 1.4%-5.6%. Soybeans grown in corn-soybean rotations systems have the potential to replace more than 180 kg hm-2 of urea application. Corn-soybean rotation with low N inputs is an efficient and sustainable agricultural strategy.
Keywords: Rotation, Straw return, Corn yield, nitrogen fractions, 15 N-labeled
Received: 07 Apr 2024; Accepted: 09 Jul 2024.
Copyright: © 2024 Yan, Yang, Song, Shan, Lyu, Yan, Wang and Ma. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Chunmei Ma, Northeast Agricultural University, Harbin, China
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Yi Yang
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