[1]QIAO Yanhui,QI Yukun,WANG Yuehai,et al.Analysis and Evaluation on Replacement Models of Secondary Tamarix chinensis Degraded Forest in Yellow River Delta[J].Research of Soil and Water Conservation,2020,27(06):370-376.
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Analysis and Evaluation on Replacement Models of Secondary Tamarix chinensis Degraded Forest in Yellow River Delta
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
370-376
Column:
目次
Public date:
2020-10-20
- Title:
- Analysis and Evaluation on Replacement Models of Secondary Tamarix chinensis Degraded Forest in Yellow River Delta
- Keywords:
- Yellow River delta; secondary Tamarix chinensis; degradedforest; alternate transformation mode
- CLC:
- S756.4
- DOI:
- -
- Abstract:
- In order to select the optimal stand model for replacement and transformation of degraded Tamarix chinensis forest in the saline-alkali region of the Yellow River delta, and guide protection and transformation of natural secondary T. chinensis forest in practice, 4 kinds of replaced and transformed stands of and the unmanaged T. chinensis were selected as the samples, the growth levels of 4 kinds stands, the effects of the 4 kinds of stands and the unmanaged secondary T. chinensis on woodland vegetation and soil physicochemical properties in the Yellow River delta were compared and evaluated. The results showed that:(1)the stand conditions(stand density, tree preservation rate, breast diameter, tree height, crown width)of secondary T. chinensis after replacement transformation of 5 years were significantly better than those of the degraded secondary T. chinensis stand;(2)in terms of the species and growth of vegetation, the stand habitat formed after replacement transformation was obviously better than that of the degraded secondary T. chinensis forest, and the plant species of undergrowth increased, the species of heavy-moderate saline-alkali tolerant plants decreased, and the species of moderate saline-alkali tolerant plants increased;(3)the soil porosity, organic matter and nutrient contents of the four replaced stands were significantly improved, and the soil density, pH value and salinity showed a decreasing trend, and the physicochemical condition of the soil was significantly improved.(4)the comprehensive evaluation of the stand growth status and soil physicochemical indexes showed that the comprehensive evaluation of the effects of the four replaced stand models and the degraded T. chinensis stands without modification decreased in the order: Robinia pseudoacacia>Ulmus pumila>Fraxinu velutina>Salix americana> degraded secondary T. chinensis forest. According to the comparative analysis and evaluation of stand status, soil physicochemical indexes of forest land and undergrowth vegetation of the four models of replacement and transformation of degraded T. chinensis forest, the R. pseudoacacia forest was the best, followed by the U. pumila forest, the F. velutina forest was poor, and the S. americana forest was the worst and should not be selected.
- References:
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Last Update:
2020-10-20