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Optimization of increasing biochar doses with soil-plant-microbial functioning and nutrient uptake of maize
Environmental Technology & Innovation ( IF 7.1 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.eti.2020.101191
Tamás Kocsis , Zsolt Kotroczó , Levente Kardos , Borbála Biró

Biochar is an industrial product made from organic wastes thought pyrolysis process and its application to soil-plant systems is known to result several benefits. Care should be however needed to select the appropriate doses, as a function of soils and environmental conditions. The aim of the study was to examine the effect of increasing (0.5-, 1-, 2.5-, 5- and 10 m m%) biochar doses on some agrochemical and biological parameters of sandy soil, in an ecological farming system where there are particularly few opportunities to retain soil nutrients, enhancing biological activity. Wood-derived biochar (pyrolyzed at 600 °C) was mixed with soil. The nutrient content of the test plants was determined photometrically and by atomic adsorption after selenium-sulfuric acid digestion. Soil biological activity was determined by fluorescein diacetate enzyme (FDA) activity, while the microbial number was determined by the Most Probable Number (MPN) method.

Our hypothesis was that appropriate biochar doses needed for improvement of general soil quality parameters, through the better soil-biological activities. Meanwhile the nutrient uptake of plants was measured and the biomass production of maize, the microbial abundance of key-important microorganisms and enzyme activities of fluorescein diacetate (FDA) was also assessed. Biochar applications were significantly increased biomass and yield of maize compare to the untreated control. Dose limit application of positive effect was also find in Arenosols. The increasing biochar doses might increase enzyme activities and can improve several microbial groups biomass which suggests a selection pressure of biochar to microbial population in soil and resulted in significantly higher root mass. Overall, the application of biochar (at a dose of 1%) was found to be effective on weakly humus (calcareous) sandy soils in terms of yield.



中文翻译:

通过土壤-植物-微生物功能和玉米养分吸收来优化增加生物炭剂量

Biochar是一种由有机废物经热解过程制成的工业产品,其在土壤植物系统中的应用已知会带来多种好处。但是,应根据土壤和环境条件选择合适的剂量。该研究的目的是研究在生态农业系统中,特别是在生态农业系统中,增加(0.5%,1、5%,2.5%,5-5%和10%)生物炭剂量对沙质土壤某些农业化学和生物学参数的影响。保留土壤养分,增强生物活性的机会很少。将木材衍生的生物炭(在600°C下热解)与土壤混合。硒-硫酸消化后,通过光度法和原子吸附法测定了受试植物的营养成分。

我们的假设是,通过更好的土壤生物活性,需要适当的生物炭剂量来改善一般土壤质量参数。同时测量了植物的养分吸收,并评估了玉米的生物量生产,关键重要微生物的微生物丰度以及荧光素双乙酸酯(FDA)的酶活性。与未处理的对照相比,生物炭的施用显着增加了玉米的生物量和产量。在槟榔中也发现了剂量限制的积极作用。生物炭剂量的增加可能会增加酶的活性,并可以改善几种微生物的生物量,这表明生物炭对土壤中微生物种群的选择压力,并导致根系质量显着提高。总体而言,发现生物炭(1%的剂量)在单产腐殖质(钙质)沙质土壤上是有效的。

更新日期:2020-10-02
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