文献类型： 外文期刊

作者： Carciochi, Walter D. ¹ ; Dobermann, Achim ² ; La Menza, Nicolas Cafaro ¹ ; Brouder, Sylvie M. ³ ; Donough, Christopher R. ¹ ; Heuschele, Deborah Jo ⁴ ; Oberthuer, Thomas ⁵ ; Sandana, Patricio ⁶ ; Shehu, Bello Muhammad ⁷ ; Pereira, Jessica Thainara S. ⁸ ; Soratto, Rogerio P. ⁸ ; Volenec, Jeffrey J. ³ ; Wandri, Ruli ¹⁰ ; Wang, Yajing ¹¹ ; Win, Su Su ¹² ; He, Ping ¹¹ ; Grassini, Patricio ¹ ;

作者机构： 1.Univ Nebraska, Dept Agron & Hort, POB 830915, Lincoln, NE 68583 USA

2.Int Fertilizer Assoc, 49 Ave lena, F-75116 Paris, France

3.Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA

4.ARS, USDA, Plant Sci Res Unit, St Paul, MN 55108 USA

5.African Plant Nutr Inst APNI, UM6P Expt Farm, Benguerir 41350, Morocco

6.Univ Austral Chile, Inst Plant Prod & Protect, Fac Agr & Food Sci, Campus Isla Teja, Valdivia 5110566, Chile

7.Bayero Univ Kano, Dept Soil Sci, Kano 700241, Rimin Gata, Nigeria

8.So Paulo State Univ UNESP, UNESP, Coll Agr Sci, Dept Crop Sci, POB 237, BR-18610307 Botucatu, SP, Brazil

9.Sao Paulo State Univ, UNESP, Ctr Trop Roots & Starches, BR-18610034 Botucatu, SP, Brazil

10.PT Sampoerna Agro Tbk, Sampoerna Strateg Sq,North Tower,28-F Jln Jendral, Jakarta 12930, Indonesia

11.Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Inst Agr Resources & Reg Planning, Key Lab Plant Nutr & Fertilizer,State Key Lab Effi, Beijing 100081, Peoples R China

12.Minist Agr Livestock & Irrigat MOALI, Dept Agr Res DAR, Nay Pyi Taw 15013, Myanmar

关键词： harvest index; internal efficiency; nutrient uptake; potassium concentration; yield

期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.4； 五年影响因子：6.6 ）

ISSN： 0378-4290

年卷期： 2025 年 322 卷

页码：

收录情况： SCI

摘要： Context: Potassium (K) management is crucial for addressing global yield gaps in agricultural systems. Objectives: To determine K uptake requirements, K internal efficiency (KIE), and K removal for several crops at different yield targets while assessing the factors driving variation. Methods: We compiled a comprehensive database to determine K requirement, KIE, and K removal for various yield potentials. We assessed intra- and inter-species variations in KIE and compared the K-related parameters across 14 crop species. Results: The K uptake requirements increased with crop yield, with an average two-fold smaller K requirement (22 versus 41 kg K) and 4-fold smaller K removal (3.8 versus 15 kg K) per ton of harvested organ in cereals than soybean. Variations in KIE within crops were related to K harvest index (KHI) in maize and wheat and K concentration in harvested product (KCHP) in soybean. Variation in KCHP across species was related to protein and moisture content. The KIE ranked as follows: cassava and sugarcane (87) > cereals, potatoes, and alfalfa (41-58) > banana and oil-rich crops (10-30 kg kg(-1) K). Net K removal increased with higher yield, KHI, and crop residue removal. Conclusions: The K uptake requirement increases with yields, while KIE decreases as yields approach potential yield. Variation in KIE among species derives from differences in KCHP and KHI. Thus, effective K management must consider yield levels, crop choice, and residue management. Significance: We provided a foundation for quantifying K requirements and removals across crop species and target yields, offering essential insights for sustainable K management in agroecosystems.