Effects of Long-Term Conservation Tillage on Soil Nitrogen Mineralization During Maize Growth

文献类型： 外文期刊

第一作者： Ding, Jinli

作者： Ding, Jinli;Gao, Cuimin;Yang, Yonghui;Gao, Cuimin;Yang, Yonghui;Hu, Wei

作者机构：

关键词： key factors; maize growth stages; nitrogen mineralization; physicochemical characteristics; tillage treatments

期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN： 0266-0032

年卷期： 2025 年 41 卷 3 期

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收录情况： SCI

摘要： Quantifying how tillage systems affect soil nitrogen transformation during maize growth with the soil in situ incubation method is important for understanding how agronomic management can better sustain long-term soil productivity. The objectives of this study were to investigate the impacts of long-term tillage on the net N nitrification, ammonification and mineralization rates during different maize growth stages. The effects of 10 years of continuous conventional tillage (CT), no-tillage (NT) and subsoil tillage (ST) were evaluated on soil N transformation processes during three key maize growth stages (i.e., from emergence to jointing (E-J), from emergence to heading (E-H) and from emergence to harvesting (E-HA)) in 2015 and 2016. The soil N nitrification and mineralization rates differed during the different growth stages of maize. In 2015, compared with those under CT, the soil N nitrification and mineralization rates under the NT treatment significantly decreased by 59.9% and 58.2% during the E-J stage of maize but increased by 24.9% and 41.1% during the E-HA stage of maize, respectively. During the E-HA stage of maize in 2015 and 2016, the soil N mineralization rate under ST significantly decreased by 15.0% and 16.3%, respectively, compared with that under CT, but the soil N mineralization rates under NT were greater than those under CT in both years. Based on the results of the correlation and path analysis, the maximum direct effects on soil ammonification, nitrification and mineralization were pH, SOC and MBC during the E-J stage; C/N, SOC and pH during the E-H stage; and SOC, SOC and BD during the E-HA stage of maize, respectively. When the available soil nitrogen source and nitrogen leaching risk are comprehensively considered, no-tillage is better than the conventional tillage and subsoiling tillage treatments in the North China Plain.

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