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首页> 外文期刊>Soil and Water Research >Losses of Soluble Forms of Organic Carbon in Relation to Different Agro-Technical Treatment of Meadows
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Losses of Soluble Forms of Organic Carbon in Relation to Different Agro-Technical Treatment of Meadows

机译：草甸不同农业技术处理对有机碳可溶性形态的损失

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Studies were performed to determine the loss of soluble forms of organic carbon in differently used meadows on mineral soil. In a long-term experiment two variants were distinguished: a productive meadow (N120-AN and N120-CN) and a non-productive one (Kp-AN, Kp-CN, Kz-AN, Kz-CN). Productive meadows were fertilized with 120 kg N/ha/year, 34.9 kg P/ha/year, and 149.4 kg K/ha/year and mown three times a year. Nitrogen fertilization was applied in a form of ammonium nitrate (AN) and calcium nitrate (CN). The only agro-technical measure applied to non-productive meadows was the regular cutting of vegetation and leaving it on the plots (variants: Kp-AN and Kp-CN) or taking it away from the plots (variants: Kz-AN, Kz-CN). Significant positive Pearson's linear correlations were found between pH (in CaCl2) of mineral soil and total organic carbon (TOC) content in the following variants: Kz-AN (r = 0.457"), N120-AN (r = 0.491"), and N120-CN (r = 0.424**) and in all meadows fertilized with AN (r = 0.243"). The obtained linear correlation coefficients between pH and TOC indicate that soil organic carbon may be lost as a result of progressive acidification of the soil. Dissolved organic carbon in the mineral meadow soil increased in the following order: Kp-CN > N120-CN > Kz-CN > N120-AN > Kp-AN > Kz-AN.
机译：进行了研究以确定矿物土壤上不同使用的草甸中有机碳可溶性形式的损失。在长期实验中，区分了两个变体：生产性草地（N120-AN和N120-CN）和非生产性草地（Kp-AN，Kp-CN，Kz-AN，Kz-CN）。高产草甸施肥120千克氮/公顷/年，34.9千克磷/公顷/年和149.4千克钾/公顷/年，并每年割草3次。氮肥以硝酸铵（AN）和硝酸钙（CN）的形式施用。应用于非生产性草甸的唯一农业技术措施是定期砍伐植被并将其留在田地上（变体：Kp-AN和Kp-CN）或将其带离田地（变体：Kz-AN，Kz -CN）。在以下变体中，发现矿质土壤的pH（在CaCl2中）与总有机碳（TOC）含量之间存在显着的正Pearson线性相关性：Kz-AN（r = 0.457“），N120-AN（r = 0.491”）和N120-CN（r = 0.424 **）以及在所有使用AN施肥的草地上（r = 0.243“）。pH和TOC之间的线性相关系数表明，土壤的逐步酸化可能会损失土壤有机碳。矿物草甸土壤中的溶解有机碳按以下顺序增加：Kp-CN> N120-CN> Kz-CN> N120-AN> Kp-AN> Kz-AN。

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