摘要
采用常规的样地调查法,对安徽6个主产地的毛竹林土壤养分与生产力关系进行调查分析。结果表明,不同产地毛竹林生长及其生产力水平差异明显,林分平均密度为2 298～3 496株.hm-2,平均胸径9.0～10.8 cm,平均立竹度0.21～0.34,林分生物量54.7～94.6 t.hm-2;土壤容重多数在1.20 g.cm-3以上,有机质含量25.6～40.2 g.kg-1,全氮1.62～4.56 g.kg-1,全磷0.61～0.92 g.kg-1,有效氮56.5～78.8 mg·kg-1。相关分析显示毛竹林生物量与土壤有机质、全氮、全磷和全钾呈显著正相关,立竹度与土壤有机质、土壤全磷和全钾呈显著正相关。改善土壤物理性、提高土壤肥力特别是有机质含量是促进毛竹林优质丰产的重要措施。
The productivity of Phyllostachys pubescens stands and their soil nutrients at the six main distri- bution areas in Anhui were studied using the conventional plot survey method. The result showed that there ex- isted significant difference in growth and productivity of Phyllostachys pubescens stands amongst the different main areas. The mean densities were from 2 298 to 3 496 culms-hm-2 with the mean DBH from 9.0 cm to 10.8 cm. The mean stand density indices were ranged from 0.21 to 0.34. The stand biomass averaged from 54.7 to 94.6 t·hm-2. The properties of soils under the Phyllostachys pubescens stands differed significantly at different sites. The mean bulk densities for most soils were over 1.20 g·cm-3. The mean concentrations of soil organic matter ranged from 25.6 to 40.2g·kg^-1, and the total N from 1.62 to 4.56 g·kg^-1, total P from 0.61 to 0.92 g·kg^-1, available N from 56.5 to 78.8 mg·kg^-1. Results from the regression analysis showed that the biomass of Phyllostachyspu- bescens stand was significantly and positively correlated with soil organic matter, total N, total P and total K （p 〈 0.05）. The stand density index was significantly and positively correlated with soil organic matter, total P and total K （p 〈 0.05）. This suggests that to decrease soil bulk density and to increase organic matter content are the impor- tant measures for promotion of the high-quality and productivity of Phyllostachys pubescens stands.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2013年第1期11-14,共4页
Journal of Anhui Agricultural University
基金
中科院战略性先导科技专项(XDA0505020401-1)资助
关键词
毛竹
土壤肥力
生物量
林分生产力
相关分析
Phyllostachyspubescens
soil fertility
biomass
forest productivity
regression analysis
