李清雪, 贾志清, 何凌仙子, 等. 高寒沙地沙柳人工林林下草本群落及土壤特性[J]. 西南林业大学学报(自然科学), 2025, 45(4): 1–9. DOI: 10.11929/j.swfu.202405025
引用本文: 李清雪, 贾志清, 何凌仙子, 等. 高寒沙地沙柳人工林林下草本群落及土壤特性[J]. 西南林业大学学报(自然科学), 2025, 45(4): 1–9. DOI: 10.11929/j.swfu.202405025
LI Qing-xue, JIA Zhi-qing, HE Ling-xian-zi, ZHANG Jia-peng, ZHAO Xue-bin, YANG Xiu-ben, FAN Wen-xiu. Herbaceous communities and soil properties of Salix psammophila plantations on alpine sandy land[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202405025
Citation: LI Qing-xue, JIA Zhi-qing, HE Ling-xian-zi, ZHANG Jia-peng, ZHAO Xue-bin, YANG Xiu-ben, FAN Wen-xiu. Herbaceous communities and soil properties of Salix psammophila plantations on alpine sandy land[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202405025

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高寒沙地沙柳人工林林下草本群落及土壤特性

Herbaceous communities and soil properties of Salix psammophila plantations on alpine sandy land

  • 摘要: 以青海省海南州共和盆地衰退沙柳人工林为研究对象,分析2种密度及2种平茬措施林下草本群落及土壤特性。结果表明:4种林分类型林下草本植物共有20种,隶属10科19属,共有优势种为赖草和斜茎黄耆;2种密度林分斜茎黄耆的重要值最大,2种平茬措施林分赖草的重要值明显高于斜茎黄耆;2种密度林分草本植物种数量相同(13种),低于全平茬林(17种)和隔行平茬林(14种)。低密度林和隔行平茬林林下草本植物群落总盖度、总生物量、土壤粉粒和极细砂粒含量分别高于高密度林和全平茬林;2种平茬措施林分的土壤粉粒含量明显高于2种密度林分。沙柳人工林基本特征与林下草本群落及土壤特性的RDA排序表明,沙柳的冠幅、林分密度和基径是草本群落和土壤特性的主要影响因素。对4种林分类型林下草本群落特征及土壤特性的综合评价结果为隔行平茬林>全平茬林>低密度林>高密度林。

     

    Abstract: To enable the plantation on alpine sandy land to play its ecological function efficiently and sustainably, the understory herbaceous communities and soil properties of Salix psammophila plantation with 2 densities and 2 stubble measures in Gonghe Basin were analysed. The results showed that there were 20 species of herbs belongs to 10 families and 19 genera in 4 plantation types, Leymus secalinus and Astragalus adsurgens were the common dominant species. The important value of A. adsurgens was the highest in the 2 density plantations, and the important value of L. secalinus in the 2 stubble measure plantations was significantly higher than that of A. adsurgens. The number of herbaceous species in the 2 density plantations was the same (13), which was lower than that in the full stubble plantation (17) and in the alternate stubble plantation (14). The total coverage and biomass of herbaceous community and the soil silt and very fine sand contents in low density plantation and alternate stubble plantation were higher than those in high density plantation and full stubble plantation, respectively. The soil silt content of the 2 stubble measure plantations was significantly higher than that of the 2 density plantations. Ordination diagram of RDA on herbaceous communities and soil properties with basic conditions of S. psammophila plantations showed that the crown, plantation density and base diameter of S. psammophila were the main factors affecting the herbaceous community and soil properties. The results of comprehensive evaluation of understory herbaceous communities and soil properties of the 4 plantation types were as follows: alternate stubble plantation > full stubble plantation > low density plantation > high density plantation.

     

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