Chemical fractionation and bioavailability of potassium as affected by digestate in a degraded Ultisol under maize cultivation

IF 2.3 4区农林科学 Q1 AGRONOMY

Archives of Agronomy and Soil Science Pub Date : 2023-05-11 DOI:10.1080/03650340.2023.2210062

N. Okoli, C. Echereobia, C. Ahukaemere, Chinonoso Chris-Emenyonu, Nnebue Obinna, A. Osisi, E. Chukwu, N. Egboka

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引用次数: 0

Abstract

ABSTRACT Application of soil amendment enhances redistribution of potassium (K) forms which affects K availability. Information on the effect of soil amendment on soil K dynamics is vital for management of soil K. The effects of digestate on dynamics of water soluble (WS), exchangeable K (Exch), non-exchangeable (Non-Ex) and mineral (Min) K fractions as well as maize growth and potassium uptake were investigated under a factorial experiment arranged in a completely randomized design of 5 (0, 5, 10, 15, 20 t ha−1 digestate) × 3 (2, 4, 6 weeks after planting (WAP) ×2 (two growth cycles of maize). During incubation experiment, digestate application increased K fractions and altered the order of distribution of K fractions from Min > Exch > non-Ex > WS in the control soil to Min > WS > Non-Ex > Exch in the amended soil. Potassium availability increased with WAP in first cycle but decreased with WAP in second cycle due to crop uptake. Potassium uptake and dry matter yield were better in first cycle relative to second cycle. Complementing digestate with mineral fertilizer would improve K uptake and maize growth.

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玉米栽培条件下降解Ultisol中消化物对钾的化学分馏和生物利用度的影响

土壤改良剂的施用促进了钾形态的再分配，从而影响钾的有效性。土壤改良剂对土壤K的影响信息动态管理至关重要的土壤K .水溶性的digestate对动力学的影响(WS),可交换的K (Exch),恕不退换(Non-Ex)和矿物(Min) K分数以及玉米生长和钾吸收了下析因实验安排在一个完全随机设计5(0、5、10、15、20 t ha−1 digestate)×3(2、4、6周后种植(WAP)×2(两个生长周期的玉米)。在培养试验期间，施用消化剂增加了钾组分，并改变了钾组分的分布顺序，从对照土壤中的Min > Exch > non-Ex > WS到改良土壤中的Min > WS > non-Ex > Exch。钾的有效性在第一个周期随着WAP的增加而增加，但在第二个周期由于作物吸收而降低。第1周期的吸钾量和干物质产量好于第2周期。在消化液中补充矿物肥可以提高玉米对钾的吸收和生长。

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来源期刊

Archives of Agronomy and Soil Science AGRONOMY-SOIL SCIENCE

CiteScore

5.50

自引率

4.20%

发文量

107

期刊介绍： rchives of Agronomy and Soil Science is a well-established journal that has been in publication for over fifty years. The Journal publishes papers over the entire range of agronomy and soil science. Manuscripts involved in developing and testing hypotheses to understand casual relationships in the following areas: plant nutrition fertilizers manure soil tillage soil biotechnology and ecophysiology amelioration irrigation and drainage plant production on arable and grass land agroclimatology landscape formation and environmental management in rural regions management of natural and created wetland ecosystems bio-geochemical processes soil-plant-microbe interactions and rhizosphere processes soil morphology, classification, monitoring, heterogeneity and scales reuse of waste waters and biosolids of agri-industrial origin in soil are especially encouraged. As well as original contributions, the Journal also publishes current reviews.