Scholarlink

Background and aims <p>Phosphorus (P) accumulation as “legacy P” in soils presents a challenge and an opportunity for sustainable agriculture. Cover crops (CCs) have been investigated for their P-acquisition strategies, but studies mainly focus on single species. We examined whether CC mixtures enhance P cycling compared to individual CCs by improving P uptake, soil P dynamics, and supporting subsequent wheat growth.</p> Methods <p>The CC species <i>Avena strigosa</i> Schreb. (black oat), <i>Phacelia tanacetifolia</i> Benth. (phacelia), <i>Trifolium alexandrinum</i> L. (berseem clover), <i>Fagopyrum esculentum</i> Moench (buckwheat), <i>Linum usitatissimum</i> L. (linseed), <i>Guizotia abyssinica</i> [Lf] Cass. (ramtil) and <i>Sinapis alba</i> L. (white mustard) were cultivated individually or in mixtures in columns containing low-P soil over two 80-day cycles. After incorporating CC biomass, summer wheat was grown to maturity. Measurements included CC biomass and P uptake, soil pH, potential phosphatase activity, P fractions, and wheat P uptake and yield.</p> Results <p>Five out of seven CC mixtures showed higher biomass than single species, and all mixtures achieved greater P uptake. Mixtures increased alkaline phosphatase activity compared to fallow and single CCs. After the wheat cycle, soil treated with mixtures had the highest labile P and reduced moderately labile P by ~ 35% more than single CCs. Nevertheless, wheat P uptake and yield remained largely unaffected.</p> Conclusion <p>CC mixtures improved P mobilization, uptake, and phosphatase activity compared to single CCs, but this did not translate into improved wheat performance. The findings highlight the potential of CC mixtures to mobilize P, suggesting enhanced P use efficiency and soil P availability.</p> Graphical abstract <p></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

Tailored cover crop mixtures enhance soil phosphorus cycling but not wheat yield in a short-term column experiment

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月25日

查看全文
  • Henrique Rasera Raniro,
  • Christiana Staudinger,
  • Karin Hage-Ahmed,
  • Dorette S. Müller-Stöver,
  • Jakob Santner

摘要

Background and aims

Phosphorus (P) accumulation as “legacy P” in soils presents a challenge and an opportunity for sustainable agriculture. Cover crops (CCs) have been investigated for their P-acquisition strategies, but studies mainly focus on single species. We examined whether CC mixtures enhance P cycling compared to individual CCs by improving P uptake, soil P dynamics, and supporting subsequent wheat growth.

Methods

The CC species Avena strigosa Schreb. (black oat), Phacelia tanacetifolia Benth. (phacelia), Trifolium alexandrinum L. (berseem clover), Fagopyrum esculentum Moench (buckwheat), Linum usitatissimum L. (linseed), Guizotia abyssinica [Lf] Cass. (ramtil) and Sinapis alba L. (white mustard) were cultivated individually or in mixtures in columns containing low-P soil over two 80-day cycles. After incorporating CC biomass, summer wheat was grown to maturity. Measurements included CC biomass and P uptake, soil pH, potential phosphatase activity, P fractions, and wheat P uptake and yield.

Results

Five out of seven CC mixtures showed higher biomass than single species, and all mixtures achieved greater P uptake. Mixtures increased alkaline phosphatase activity compared to fallow and single CCs. After the wheat cycle, soil treated with mixtures had the highest labile P and reduced moderately labile P by ~ 35% more than single CCs. Nevertheless, wheat P uptake and yield remained largely unaffected.

Conclusion

CC mixtures improved P mobilization, uptake, and phosphatase activity compared to single CCs, but this did not translate into improved wheat performance. The findings highlight the potential of CC mixtures to mobilize P, suggesting enhanced P use efficiency and soil P availability.

Graphical abstract