Band applied K increases agronomic and economic efficiency of K fertilization in a crop rotation under no-till in southern Brazil

IF 4.5 1区农林科学 Q1 AGRONOMY

European Journal of Agronomy Pub Date : 2025-03-12 DOI:10.1016/j.eja.2025.127595

Gustavo Pesini , Dayana Jéssica Eckert , João Pedro Moro Flores , Lucas Aquino Alves , Dionata Filippi , Gabriela Naibo , André Luis Vian , Christian Bredemeier , Danilo Rheinheimer dos Santos , Tales Tiecher

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Abstract

The effectiveness of potassium (K) fertilizer management strategies on sandy clay loam soils under no-till (NT) is essential to achieving economically viable yields. This study compared the agronomic and economic efficiency of K fertilization using band application versus broadcast distribution on a subtropical Acrisol under NT. From 2019–2023, five K rates (0, 50, 100, 150, and 200 kg ha⁻¹) were applied annually using band and broadcast methods during spring/summer at corn or soybean sowing. There was no increase in grain crop yield with K broadcast application. This resulted in economic loss and significantly increased the available K levels in the topsoil, hampering the use of this soil layer to diagnose K availability and the likelihood of response to K fertilizers. The optimum agronomic and economic K rate matched the output K rate when the fertilizer was banded. The application of 50 kg ha⁻¹ of K increased 20 % the partial factor productivity, 300 % the agronomy efficiency, 680 % the economic profit from applied K, and 100 % the value cost ratio compared to the broadcast application. Even with available K above the critical level in the soil of the 0–10 cm layer, low rates of K fertilizers should be applied banded in the seed furrow.

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来源期刊

European Journal of Agronomy 农林科学-农艺学

CiteScore

8.30

自引率

7.70%

发文量

187

审稿时长

4.5 months

期刊介绍： The European Journal of Agronomy, the official journal of the European Society for Agronomy, publishes original research papers reporting experimental and theoretical contributions to field-based agronomy and crop science. The journal will consider research at the field level for agricultural, horticultural and tree crops, that uses comprehensive and explanatory approaches. The EJA covers the following topics: crop physiology crop production and management including irrigation, fertilization and soil management agroclimatology and modelling plant-soil relationships crop quality and post-harvest physiology farming and cropping systems agroecosystems and the environment crop-weed interactions and management organic farming horticultural crops papers from the European Society for Agronomy bi-annual meetings In determining the suitability of submitted articles for publication, particular scrutiny is placed on the degree of novelty and significance of the research and the extent to which it adds to existing knowledge in agronomy.