Comprehensive Evaluation of Soil Fertility after Transformation of the Low-Quality Forest in the Daxing' anling Mountains
This study studied the changes of soil physical and chemical properties and carbon flux of broadleaved mixed secondary growth stands and birch coppice low-quality forests after clearcutting with various bandwidths in the Daxing' anling Mountains. Pinus sibirica, Pinus sylvestris var. mongolica and Larix gmelinii were planted after cutting. An improved AHP method was used for comprehensively evaluating the sites' fertility after the treatments. Results showed that the soil fertility quality index was higher than the control site for all treated sites except the broadleaved secondary P. sibirica stands in the 6 m cutting strip, where the soil fertility index was slightly less than the control site. In all the low-yield broadleaved secondary stand improvement treated sites, the soil fertility quality index of the site with the L. gmelinii stand planted in the 14 meter cutting strip showed the highest value of 0. 744. In the sites after clearcutting birch coppice low-quality forests, P. sylvestris var. mongolica stands in the 14 meter cutting strip had the highest soil quality index of 0.617. According to the Spearman correlation analysis, major factors affecting soil fertility include soil organic matter, total nitrogen and hydrolysis phosphorus content.
国家科技期刊平台
NSTL
万方数据
维普
