皆伐油松林不同恢复措施下团聚体与球囊霉素分布特征

发布时间：2018-07-29 20:44

【摘要】：以未扰动油松林为对照,研究了油松林皆伐后在不同措施下恢复为幼林地、灌木地和撂荒地0~20cm土层团聚体稳定性、团聚体中球囊霉素相关土壤蛋白(GRSP)和有机碳(SOC)含量变化特征.结果表明:与对照相比,幼林地团聚体稳定性显著降低(P0.05),而灌木地及撂荒地团聚体稳定性显著增加.不同恢复措施团聚体中易提取球囊霉素相关土壤蛋白(EE-GRSP)分布的变化趋势与团聚体稳定性一致,灌木地团聚体中EE-GRSP含量相比对照显著增加且最大.灌木地和撂荒地大团聚体(250μm)中总量球囊霉素相关土壤蛋白(T-GRSP)含量相比对照显著增加而撂荒地粉黏粒团聚体(53μm)中T-GRSP含量显著减小.粉黏粒团聚体中EE-GRSP含量普遍大于其他粒径团聚体;微团聚体(53~250μm)中T-GRSP含量普遍大于其他粒径团聚体.相比于其他粒径团聚体,大团聚体中T-GRSP可以更准确的反映土壤碳库的变化,团聚体稳定性更依赖于大团聚GRSP.
[Abstract]:Using undisturbed Pinus tabulaeformis forest as control, the changes of soil aggregate stability, (GRSP) and (SOC) content of soil proteins related to balloon mycin were studied under different measures to restore 0~20cm soil aggregate to young forest land, shrub land and abandoned land after clear-cutting of Pinus tabulaeformis forest. The results showed that the stability of aggregates in young woodland was significantly lower than that in control (P0.05), while the stability of aggregates in shrubs and abandoned land increased significantly. The distribution of ballon mycin associated soil protein (EE-GRSP) in aggregates with different recovery measures was consistent with the stability of aggregates, and the EE-GRSP content in aggregates in shrub fields was significantly higher than that in the control. The content of total balloon mycin associated soil protein (T-GRSP) in large aggregates (250 渭 m) and silt clay aggregates (53 渭 m) in shrubbery and abandoned land was significantly increased compared with the control, and the content of T-GRSP in silt clay aggregate (53 渭 m) was significantly decreased. The content of EE-GRSP in powder agglomerates is generally higher than that in other aggregates, and the content of T-GRSP in microaggregates (53 ~ 250 渭 m) is higher than that in other aggregates. Compared with other aggregates, T-GRSP in large aggregates can reflect the change of soil carbon pool more accurately, and the stability of aggregates is more dependent on large agglomeration.
【作者单位】：西北农林科技大学水土保持研究所;中国科学院水利部水土保持研究所;
【基金】：国家自然科学基金项目(41371508,41671513) 国家“十二五”科技支撑课题(2015BAC01B03)
【分类号】：S714

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