The Application of Slow-Release Nitrogen Combined with Soil Conditioner Under the Impact of Alkaline Salinity in Alfalfa Cultivation and Soil Improvement

文献类型: 外文期刊

第一作者: Liu, Ping

作者: Liu, Ping;Zhao, Zichao;Liu, Zhaohui;Wu, Bo;Wang, Guoliang

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关键词: controlled-release fertilizer; soil conditioner; alfalfa; coastal saline-alkali land; soil improvement

期刊名称:AGRONOMY-BASEL ( 影响因子:3.4; 五年影响因子:3.8 )

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年卷期: 2025 年 15 卷 4 期

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收录情况: SCI

摘要: Water-based resin-coated controlled-release fertilizer (CRF) is valued for its safety, environmental benefits, and water absorption/retention properties. To improve the productivity of alfalfa (Medicago sativa L.) and the soil quality in coastal saline-alkali land at the Yellow River Delta, in this work, we carried out field experiments to study how the application of CRF (water-based resin-coated urea) and soil conditioner, both developed in-house, affected the alfalfa harvest and the soil properties. The following five treatments were tested from 2022 to 2023: T0, no fertilization; T1, urea with P&K fertilizers; T2, CRF with P&K fertilizers; T3, urea, P&K fertilizers, and soil conditioner; T4, CRF, P&K fertilizers, and soil conditioner. The results showed that the simultaneous application of CRF and soil conditioner (i.e., T4) had the most obvious effect on improving the yield and quality of alfalfa. In 2022, T4 had 6.3% higher total alfalfa yield than T0. In 2023, T4 had 14.2% and 8.4% higher total alfalfa yield than T0 and T1, respectively. The alfalfa from T4 had higher crude protein content and relative feeding value (RFV), lower acid detergent fiber (ADF) and neutral detergent fiber (NDF) content. The combined application of CRF and soil conditioner reduced the salinity of the surface soil and increased the soil organic matter, available nitrogen, and phosphorus at the 0 similar to 40 cm layer. Therefore, the application of soil conditioner and CRF can improve the use of coastal saline-alkali land for the cultivation of alfalfa.

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