Contents and elemental composition of various humus components in orchard soils according to different cultivation years in the northern China

机译：中国北方不同栽培岁月果树土壤中各种腐殖质成分的含量和元素组成

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This paper presents the study of typical orchard soils under long-term freeze-thaw conditions in the northern China and analyzed the contents of various combined humus components and elemental composition characteristics in orchard soils with different cultivation years. The analysis results indicated that the contents of the heavy fraction organic carbon, the loosely combined humus, and the stably combined humus were increased year by year and that the content of the tightly combined humus was decreased year by year. After 60-year cultivation, the content of the loosely combined humus was increased by 17.74% and the content of the tightly combined humus was decreased by 11.13%. The contents of humus acid (HA) and fulvic acid (FA) in the loosely combined humus and the stably combined humus as well as the ratio of humus acid to fulvic acid (HA/FA ratio) is gradually increase. In the loosely combined humus, the contents of N and C in FA and HA is increase and the contents of H and O is decrease. In the stably combined humus in orchard soils, the contents of N, C and H in HA is higher than those in FA and the content of O in HA is lower than that in FA.

机译：本文介绍了北方长期冻融条件下典型果树土壤的研究，分析了不同种植年果园土壤中各种组合腐殖质成分和元素组成特征的含量。分析结果表明，重量分数有机碳，松散组合的腐殖质和稳定组合的腐殖质的内容逐年增加，并且紧密结合的腐殖质的含量逐年减少。培养60岁后，松散合并的腐殖质的含量增加了17.74％，紧密合并的腐殖质的含量下降11.13％。松散组合的腐殖质和稳定组合的腐殖质中的腐性酸（HA）和富含富酸（FA）的含量以及腐殖酸与ulvic酸（HA / FA比）的比例逐渐增加。在松散组合的腐殖质中，FA和HA中的N和C的内容增加，H和O的内容减小。在果树园中的稳定组合腐殖质中，HA中N，C和H的含量高于FA中的含量，HA中O的含量低于FA。

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《International Conference on Water Resources and Environment》|2016年||共7页
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W.L. Liu; L. Ma; J.G. Wu; Y.J. Liang;
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中图分类分析化学;
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Contents and elemental composition of various humus components in orchard soils according to different cultivation years in the northern China

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