[1]SONG Yanping,YU Yanghua,LI Yitong.Change of Soil Fertility in Zanthoxylum planispinum var. dintanensis Plantation with Different Ages[J].Research of Soil and Water Conservation,2023,30(04):137-145.[doi:10.13869/j.cnki.rswc.2023.04.003.]
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Change of Soil Fertility in Zanthoxylum planispinum var. dintanensis Plantation with Different Ages
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 04
Page number:
137-145
Column:
Public date:
2023-06-10
- Title:
- Change of Soil Fertility in Zanthoxylum planispinum var. dintanensis Plantation with Different Ages
- Keywords:
- karst; forest age; Zanthoxylum planispinum var. dintanensis; soil fertility; principal component analysis
- CLC:
- S158
- DOI:
- 10.13869/j.cnki.rswc.2023.04.003.
- Abstract:
- [Objective] Exploring the change of soil fertility in Zanthoxylum planispinum var. dintanensis plantation with forest ages can provide a theoretical basis for the optimization of stand cultivation measures. [Methods] The study took Zanthoxylum planispinum var. dintanensis plantations with ages of 5～7, 10～12, 20～22, 28～32-year groups as the objects, and the Pearson's correlation and principal component analysis were carried out in combination with norm value. The minimum data set was finally established for comprehensive evaluation of soil fertility. [Results] The differences of soil fertility of different forest ages were mainly manifested in soil organic carbon, total phosphorus, total calcium, fungi, microbial biomass nitrogen, microbial biomass phosphorus. Pearson correlation analysis showed that available potassium was significantly positively correlated with actinomycete and microbial biomass phosphorus; microbial biomass nitrogen was significantly positively correlated with total phosphorus, available magnesium and available zinc, indicated that the accumulation of soil nutrients could provide a material basis for microbial growth. The limiting factors of soil fertility in different ages were different, in which 5～7, 10～12 years groups were mainly dominated by available potassium, bacteria, actinomycete and microbial biomass phosphorus; 20～22 years group was mainly limited by soil organic carbon; the important restrictive factors in 28～32 years group were available phosphorus, total calcium and fungi. The integrated fertility index decreased in the order: 20～22 years(1.06)>5～7 years(-0.05)>10～12 years(-0.42)>28～32 years(-0.58)group. [Conclusion] The nutrient absorption capacity of the plantation aged 20～22 years and beyond decreased, and the plantation below this forest age should be selected as the main management target.
- References:
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Last Update:
2023-06-10