Scholarlink

Background <p>Optimizing&#xa0;phosphorus (P) fertilizer management through&#xa0; localized soil application can improve crop P use efficiency&#xa0;and sustain agricultural productivity. However, the effects&#xa0;of P‑enriched patche size on&#xa0;soybean growth, nutrient uptake, and symbiotic N₂ fixation‑related traits remains unclear.</p> Methods <p>A pot experiment was conducted using six treatments: no P (0P), spot placement (V0), and P mixed into 10% (V10), 20% (V20), 50% (V50), or 100% (V100) of the soil volume. Grain yield, biomass, nutrient uptake, root traits, nodulation, nitrogenase activity, seed protein and fat content, and soil properties (sampled from the phosphorus- fertilized zones) were investigated.</p> Results <p>Heterogeneous P supply substantially improved soybean productivity relative to uniform application (V100). Intermediate patch sizes (V10 and V20) exhibited the highest grain yield, increasing by 28.8% and 21.5%, respectively. Moderate sized P-enriched patches, particularly V10, markedly enhanced total N and P uptake by 29.3% and 32.4%, respectively, compared to V100. In addition,&#xa0;heterogeneous P supply at V10 and V20 substantially improved P use efficiency indices and enhanced root growth by increasing root length, surface area, and root volume. Localized P supply improved nodulation and nitrogenase activity, with highest nodule number, nodule fresh weight, and nitrogenase activity in V10, exceeding V100 by 36.3%, 84.7%, and 52.3%, respectively. Seed protein content increased under V10 and V20, while fat content remained unaffected among the&#xa0;treatments. In the fertilized zones, localized P application slightly lowered pH and increased mineral N contents, while V0 increased total and available P&#xa0;content, both of which declined with increasing patch size.</p> Conclusion <p>These findings suggest that moderate‑sized heterogeneous P patches (10%–20% of soil volume) are associated with improved P acquisition, enhanced nodulation and nitrogenase activity, as well as greater soybean productivity and higher seed protein content under the pot conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Heterogeneous phosphorus distribution in a moderate soil volume enhances soybean productivity, nutrient efficiency, and biological nitrogen fixation potential

  • 期刊论文

  • 发表日期：

    2026年6月2日

查看全文
  • Yiliu Wang,
  • Muhammad Irfan,
  • Bin Wang,
  • Xinyuan Lu,
  • Solomon Yokamo,
  • Dianjun Lu,
  • Xiaoqin Chen,
  • Huoyan Wang,
  • Jianmin Zhou

摘要

Background

Optimizing phosphorus (P) fertilizer management through  localized soil application can improve crop P use efficiency and sustain agricultural productivity. However, the effects of P‑enriched patche size on soybean growth, nutrient uptake, and symbiotic N₂ fixation‑related traits remains unclear.

Methods

A pot experiment was conducted using six treatments: no P (0P), spot placement (V0), and P mixed into 10% (V10), 20% (V20), 50% (V50), or 100% (V100) of the soil volume. Grain yield, biomass, nutrient uptake, root traits, nodulation, nitrogenase activity, seed protein and fat content, and soil properties (sampled from the phosphorus- fertilized zones) were investigated.

Results

Heterogeneous P supply substantially improved soybean productivity relative to uniform application (V100). Intermediate patch sizes (V10 and V20) exhibited the highest grain yield, increasing by 28.8% and 21.5%, respectively. Moderate sized P-enriched patches, particularly V10, markedly enhanced total N and P uptake by 29.3% and 32.4%, respectively, compared to V100. In addition, heterogeneous P supply at V10 and V20 substantially improved P use efficiency indices and enhanced root growth by increasing root length, surface area, and root volume. Localized P supply improved nodulation and nitrogenase activity, with highest nodule number, nodule fresh weight, and nitrogenase activity in V10, exceeding V100 by 36.3%, 84.7%, and 52.3%, respectively. Seed protein content increased under V10 and V20, while fat content remained unaffected among the treatments. In the fertilized zones, localized P application slightly lowered pH and increased mineral N contents, while V0 increased total and available P content, both of which declined with increasing patch size.

Conclusion

These findings suggest that moderate‑sized heterogeneous P patches (10%–20% of soil volume) are associated with improved P acquisition, enhanced nodulation and nitrogenase activity, as well as greater soybean productivity and higher seed protein content under the pot conditions.