Optimizing Nitrogen and Phosphorus Fertilizer Application for Wheat Yield on Alkali Soils: Mechanisms and Effects
文献类型： 外文期刊
作者： Hou, Peng 1 ; Li, Bowen 2 ; Cao, Enkai 2 ; Liu, Zhaohui 2 ; Li, Yan 2 ; Sun, Zeqiang 2 ; Xiao, Yang 4 ; Ma, Changjian 2 ;
作者机构： 1.Zhengzhou Univ, Sch Water Conservancy & Transportat, Zhengzhou 450001, Peoples R China
2.Shandong Acad Agr Sci, Inst Agr Resources & Environm, State Key Lab Nutrient Use & Management, Jinan 250100, Peoples R China
3.Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Peoples R China
4.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China
5.Inst Modern Agr Yellow River Delta SAAS, Natl Ctr Technol Innovat Comprehens Utilizat Salin, Dongying 257091, Peoples R China
关键词： grain yield; thousand-grain weight; nutrient uptake; wheat macronutrient status
期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）
ISSN：
年卷期： 2025 年 15 卷 3 期
页码：
收录情况： SCI
摘要： Enhancing crop productivity on alkali soils is essential for food security; however, excessive fertilizer use can lead to soil salinization. Wheat, as a key staple crop, requires an appropriate nitrogen-to-phosphorus fertilization ratio to optimize its yield, yet the ideal ratio remains unclear. In this study, alongside the application of potassium and organic fertilizers, we investigated varying nitrogen application rates (100 kg/ha, 180 kg/ha) and phosphorus application rates (40 kg/ha, 80 kg/ha, 120 kg/ha). The results revealed that, under consistent nitrogen application conditions, when phosphorus application increased from 40 kg/ha to 80 kg/ha and 120 kg/ha, average yield increased by 13.6-25.1% and 0.1-12.6%, respectively. In contrast, under the same phosphorus application conditions, increasing nitrogen application from 100 kg/ha to 180 kg/ha resulted in a 2.6-17.6% increase in average yield. Among the factors considered, biomass emerged as the most significant determinant of yield (Standardized Path Coefficient (SPC) = 0.84), with key influences on biomass including soil alkali-hydrolyzable nitrogen, phosphorus uptake, and potassium uptake. The optimal fertilization strategy for wheat production on alkali soils was found to be 180 kg/ha of nitrogen and 80 kg/ha of phosphorus. These findings provide a theoretical foundation for optimizing fertilizer management in wheat cultivation on alkali soils.
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