数字农科院2.0

Optimizing fertilization depth to promote yield performance and economic benefit in maize for hybrid seed production

文献类型： 外文期刊

作者： Zhonghong Tian;Mengjie Zhang;Chang Liu;Yingzhou Xiang;Yarong Hu;Yuhao Wang;Enke Liu;Peng Wu;Xiaolong Ren;Zhikuan Jia;Kadambot H.M. Siddique;Peng Zhang

作者机构：

关键词： Economic benefit;Fertilization depth;Fertilizer use efficiency;Nutrient uptake;Seed production maize

期刊名称： European Journal of Agronomy

ISSN： 1161-0301

年卷期： 2024 年 159 卷

页码：

收录情况： SCIE（2024版）

摘要： Fertilization depth adjustment is a well-known strategy for increasing crop yields. However, the precise mechanism associated with this strategy remains unclear, particularly regarding increased nutrient absorption and utilization, and maize seed production. Thus, we examined the effects of different nitrogen fertilization depths [0 cm (L0), 5 cm (L5), 15 cm (L15), and 25 cm (L25)] on maize crop growth, nutrient uptake and distribution, fertilizer use efficiency, grain yield, and economic benefits in a field study conducted for two years (2021–2022) in Hexi Oasis Irrigation Area, northwest China. The optimal nitrogen fertilization depth was crucial for enhancing growth, dry matter production, and the grain yield. In particular, compared with L15 and L5, L25 significantly (P < 0.05) increased the average plant height by 5.00 % and 10.36 %, respectively, and dry matter accumulation by 2.65 % and 3.39 %. Furthermore, compared with L5 and L15, the total nutrient uptake was 19.17 % (P < 0.05) and 7.11 % higher under L25, respectively, and the average grain nutrient uptake was 23.33 % higher (P < 0.05). Moreover, L25 significantly increased the N, P, and K fertilizer utilization efficiency compared with L5 and L15, and the highest dry matter to grain translocation occurred under L25. Structural equation modeling confirmed that deep nitrogen fertilization promoted growth, dry matter translocation to grain, and the uptake and distribution of nutrients in maize plants to significantly improve the fertilizer use efficiency and yield. These findings are important for guiding fertilization management practices to increase maize seed production in regions with similar climate conditions.

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