Response of some characteristics of selected beneficial soil microorganisms under different potassium fertilizer applications

IF 2 4区农林科学 Q2 AGRONOMY

International Agrophysics Pub Date : 2021-11-19 DOI:10.31545/intagr/143426

C. Paul, Saha Monidipta, J. Száková, Sahu Chandra, P. Tlustoš

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引用次数: 0

Abstract

*Corresponding author e-mail: szakova@af.czu.czn **The study was supported by European Regional Development Fund NutRisk Centre No. CZ.02.1.01/0.0/0.0/16_019/0000845 (2018-2023). A b s t r a c t. Among the three important nutrients of (NPK) for plants, potassium plays a vital role in increasing disease resistance capacity and also in the activation of over 80 different enzymes responsible for plant metabolism. This article presents changes in the population of some soil beneficial microorganisms responsible for the nutrient cycling process in the soil and in their respiration activity as related to the application of different potassium (K) fertilizers (KCl and K2SO4) at different doses in a model incubation experiment. The application of KCl and K2SO4 fertilizers increases soil acidity at higher doses. The parameters describing the soil microbial community, i.e. microbial respiration and colony forming unit counts of free living N2-fixing bacteria, Rhizobium sp., Pseudomonas sp., potassium-solubilizing bacteria, and phosphate-solubilizing bacteria increased with the application of fertilizers at lower doses, but a minor decrease was observed for higher doses of fertilizers. The level of microbial activity showed a positive correlation with the application of different amounts of fertilizer but no effect was observed due to the use of different fertilizer types, thereby indicating that a substantial improvement in soil biological activities can be achieved regardless of the K fertilizer type at optimized doses. K e y w o r d s: potassium fertilizer, soil health, soil biology, incubation experiment, sustainable fertilizer use

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不同钾肥施用条件下土壤有益微生物某些特性的响应

*通讯作者e-mail: szakova@af.czu.czn **本研究由欧洲区域发展基金NutRisk中心资助。CZ.02.1.01/0.0/0.0/16_019/0000845(2018 - 2023)。在植物氮磷钾(NPK)的三种重要营养元素中，钾在提高植物抗病能力和激活80多种不同的植物代谢酶方面起着至关重要的作用。本文通过模型培养实验，研究了不同剂量钾肥(KCl和K2SO4)施用对土壤中参与养分循环过程的有益微生物数量及其呼吸活性的影响。施用高剂量的氯化钾和硫酸钾可增加土壤酸度。土壤微生物群落参数，即自由活的固氮菌、根瘤菌、假单胞菌、增钾菌和增磷菌的微生物呼吸和菌落形成单位数随施肥剂量的减少而增加，但随施肥剂量的增加而减少。土壤微生物活性水平与施钾量呈正相关，但与施钾类型无关，说明在最佳施钾剂量下，无论钾肥类型如何，土壤生物活性都能得到显著改善。研究方向:钾肥，土壤健康，土壤生物学，孵化试验，肥料可持续利用

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来源期刊

International Agrophysics 农林科学-农艺学

CiteScore

3.60

自引率

9.10%

发文量

审稿时长

3 months

期刊介绍： The journal is focused on the soil-plant-atmosphere system. The journal publishes original research and review papers on any subject regarding soil, plant and atmosphere and the interface in between. Manuscripts on postharvest processing and quality of crops are also welcomed. Particularly the journal is focused on the following areas: implications of agricultural land use, soil management and climate change on production of biomass and renewable energy, soil structure, cycling of carbon, water, heat and nutrients, biota, greenhouse gases and environment, soil-plant-atmosphere continuum and ways of its regulation to increase efficiency of water, energy and chemicals in agriculture, postharvest management and processing of agricultural and horticultural products in relation to food quality and safety, mathematical modeling of physical processes affecting environment quality, plant production and postharvest processing, advances in sensors and communication devices to measure and collect information about physical conditions in agricultural and natural environments. Papers accepted in the International Agrophysics should reveal substantial novelty and include thoughtful physical, biological and chemical interpretation and accurate description of the methods used. All manuscripts are initially checked on topic suitability and linguistic quality.