[1]ZHOU Hong,HE Zhongjun,XIAO Meng,et al.Charateristics of Soil Humin Under Different Forest Types in the Longitudinal Valley of the Hengduan Mountains[J].Research of Soil and Water Conservation,2020,27(02):48-54.
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Charateristics of Soil Humin Under Different Forest Types in the Longitudinal Valley of the Hengduan Mountains
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
48-54
Column:
Public date:
2020-03-30
- Title:
- Charateristics of Soil Humin Under Different Forest Types in the Longitudinal Valley of the Hengduan Mountains
- Keywords:
- Hengduan Mountains; different forest types; dark-brown soil; humin composition; optical properties
- CLC:
- S153.6+ 22
- DOI:
- -
- Abstract:
- In order to understand the effects of different forest types on soil Humin components, the soils of five forest vegetations under the longitudinal valley of the Hengduan Mountains in Northwestern Yunnan were selected as research samples. The composition of humus was analyzed by humus composition modification method & modified Pallo method. The results showed that:(1)the humic acid content in stand of Picea likiangensis was significantly higher than those in the other four stands, the HA/FA of different stands presented the decreasing trend, and decreased in the order: Larix potaninii var. macrocarpa>Quercus aquifolioides>Picea likiangensis>Betula platyphylla Suk.>Tsuga forrestii Downie;(2)the insoluble humin of humin components in the five different stands accounted for the majority; the content of humin in the stand of Picea likiangensis was the highest, which was more beneficial to accumulation of soil carbon compared with other stands;(3)the molecular structure of HMi&HMc in topsoil were more complex than those of the other soil layers; in addition to the C layer in the stand of Larix potaninii var. macrocarpa, the ΔlgK of each layer presented as HMc>HMi, but the E4/E6 did not always presented as HMc>HMi; the molecular structure of HMc&HMi was the most complex in the C layer of the stand of Quercus aquifolioides and the Ah layer of the stand of Picea likiangensis, respectively; therefore, the quality of humus in the stand of Larix potaninii var. macrocarpa was higher than those in the other stands. All these findings may provide reference for optimizing the forest structure and improving the carbon sequestration capacity of the forest system in this area.
- References:
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Last Update:
2020-02-25