西南林业大学学报2025，Vol.45Issue(5)：131-140,10.DOI:10.11929/j.swfu.202403065
不同林分密度对西南桦人工林根际与非根际土壤养分的影响
Rhizosphere and Non-rhizosphere Soil Nutrient Characteristics of Betula alnoides Plantation with Different Dtand Densities
摘要
Abstract
Four kinds of 15-year-old Betula alnoides forests with different stand density were selected as the research object,and their densities were(A:400 plants/hm2,B:1 000 plants/hm2,C:1 367 plants/hm2,D:2025 plants/hm2),respectively.Soil nutrient of rhizosphere and non-rhizosphere soils in different soil layers(0-20 cm,20-40 cm)were analyzed.The soil quality was evaluated by variance analysis and correlation analysis.The find-ings revealed that the rhizosphere soil pH and total potassium of the 2 soil layers reached the maximum at stand density A,pH was 4.54 and 4.31,and total potassium was 19.49 g/kg and 17.09 g/kg,respectively.The remaining nutrient indexes reached the maximum at stand density B,which was significantly higher than that of the other three stands.The total potassium content of 20-40 cm non-rhizosphere soil was the highest in stand A(16.67 g/kg),and the other nutrient indexes of non-rhizosphere soil reached the maximum at stand density B;the rhizosphere effects of different stand densities showed that pH of the 4 stands was negative,the nutrient indexes of stand A,B and C were positive as a whole,and the rhizosphere effects of stand D were negative except for total nitrogen,organic matter and total potassium.Correlation results showed that rhizosphere and non-rhizosphere soil nutrient indexes were significantly positively correlated with organic matter content as a whole.Principal compon-ent analysis showed that stand density had the greatest influence on soil organic matter,total nitrogen and total phosphorus.With 1 000 plants/hm2 stand density,the rhizosphere and non-rhizosphere nutrient content of B.al-noides plantation is rich,and the density of B.alnoides plantation can be controlled at about 1 000 plants/hm2 dur-ing production.关键词
西南桦人工林/林分密度/土壤养分/根际/非根际Key words
Betula alnoides plantation/stand density/soil nutrient/rhizosphere/non-rhizosphere分类
林学引用本文复制引用
胡文杰,韦秋思,刘世男,程飞,黄朝明,杨梅..不同林分密度对西南桦人工林根际与非根际土壤养分的影响[J].西南林业大学学报,2025,45(5):131-140,10.基金项目
广西林业科技项目[桂林科字(2016)20号]资助 （2016）
广西林业科技推广示范项目(gl2020kt01)资助. （gl2020kt01）
