Impact of sward formation on soil organic carbon variation and relations with soil microbial activity

IF 0.8 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Zemdirbyste-agriculture Pub Date : 2022-09-27 DOI:10.13080/z-a.2022.109.025
R. Skuodienė, J. Aleinikovienė, D. Tomchuk, G. Šiaudinis
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引用次数: 2

Abstract

The aim of the study was to estimate the impact of temporal sward formation on soil organic carbon (SOC) variation and soil microbial biomass carbon (MBC) content in rhizosphere. The soil of experimental sites was Bathygleyic Dystric Glossic Retisol , where the soil acidity (pH) was 3.9 and 5.0, and four mixtures of legumes and grasses were cultivated. The mixtures were composed of one legume variety and two grass varieties – timothy ( Phleum pratense L.) 35% and meadow grass ( Poa pratensis L.) 15%, 50% of each: 1) red clover ( Trifolium pratense L.), 2) white clover ( Trifolium repens L.), 3) hybrid clover ( Trifolium hybridum L.), and 4) alfalfa ( Medicago sativa L.). In the soil of different swards, SOC was more accumulated at 0–10 cm depth. The species composition of the sward did not have any significant influence on the studied indicators. In the soil of swards with pH 5.0, the SOC content in three years increased by 3.3%, SOC stock by 8.5%, and the C to N ratio was favourable for the SOC accumulation. In the naturally acidic soil (pH 3.9), the SOC content and SOC stock decreased by 12.0% and 3.3%, respectively. In the 4th year of sward formation, irrespective of the soil acidity, the SOC stock decreased, but it was similar as in the beginning of sward formation. Sward formation had a significant impact on the soil MBC. In the 2nd year of sward formation, the MBC content increased by 1.7 times in the soil with pH 5.0 and by 2 times in the naturally acidic soil compared to the year of sowing and remained relatively stable in the 3rd and the 4th year of sward formation irrespective of the soil acidity.
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草地形成对土壤有机碳变化的影响及其与土壤微生物活性的关系
本研究旨在探讨不同时期草地形成对根际土壤有机碳(SOC)变化和微生物生物量碳(MBC)含量的影响。试验点土壤为深蓝土(Bathygleyic Dystric Glossic Retisol),土壤酸度(pH)分别为3.9和5.0,种植4种豆科植物和禾本科植物混合种植。混合栽培由1个豆科品种和2个禾草品种组成,其中提莫草(Phleum pratense L.)占35%,草草(Poa pratensis L.)占15%,各占50%:1)红三叶草(Trifolium pratense L.), 2)白三叶草(Trifolium repens L.), 3)杂交三叶草(Trifolium hybridum L.), 4)苜蓿(Medicago sativa L.)。不同草地土壤有机碳在0 ~ 10 cm深度积累较多。禾草的种类组成对研究指标无显著影响。pH为5.0的草地土壤3年有机碳含量增加3.3%,有机碳储量增加8.5%,且碳氮比有利于有机碳积累。在pH为3.9的自然酸性土壤中,有机碳含量和有机碳储量分别下降了12.0%和3.3%。在草地形成的第4年,无论土壤酸度如何,土壤有机碳储量都有所下降,但与草地形成初期相似。林草形成对土壤MBC有显著影响。在草地形成第二年,与播种年份相比,在pH为5.0的土壤中,MBC含量增加了1.7倍,在自然酸性土壤中,MBC含量增加了2倍,在草地形成的第3年和第4年保持相对稳定,与土壤酸度无关。
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来源期刊
Zemdirbyste-agriculture
Zemdirbyste-agriculture AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
1.80
自引率
11.10%
发文量
36
审稿时长
>12 weeks
期刊介绍: Zemdirbyste-Agriculture is a quarterly scientific journal which covers a wide range of topics in the field of agricultural sciences, agronomy. It publishes articles of original research findings in the English language in the field of agronomy (soil and crop management, crop production, plant protection, plant breeding and genetics, biotechnology, plant nutrition, agrochemistry, soil science, microbiology etc.) and related areas. Articles are peer-reviewed. Review, debating papers as well as those of a methodological nature will also be considered.
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