Quantifying potassium requirement and removal across crop species

文献类型： 外文期刊

第一作者： Carciochi, Walter D.

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

作者机构：

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.

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