Effects of Different Land Use Types on Soil Cellulase Activity and Fertility Factors
To reveal the effect of different land use types on soil cellulase activity(SCA)and soil fertility factors,and clarify the relationship between soil chemical factors and SCA.In Hailun City,Heilongjiang Province,the soils from dry land and forest land were as the research object,and path analysis method was used to clarify the positive and negative effects of soil chemical factors on SCA.The results showed that the contents of organic carbon,total nitrogen,total phosphorus,water content and SCA of forest land were significantly higher than those of dry land,while the pH of dry land was significantly higher than that of forest land.The correlation analysis showed that there was significant negative correlations between SCA and organic carbon,total nitrogen in dry land,and there was extremely significantly positive correlation between SCA and organic carbon,water content,and significant positive correlation between SCA and TN in forest land.Path analysis showed that pH,total nitrogen and water content were important factors that had significant and direct effects on SCA in dry land,while organic carbon and total nitrogen had indirect negative effects on SCA.Organic carbon and total nitrogen were the main controlling factors of SCA in forest land.The soil fertility factors and SCA were obviously difference between dry land and forest land.The nutrient level and SCA of dry land soil were lower than those of forest land,which indicated that there was long-term and intensive human use of dry land in this region,leading to the degradation of the nutrient status of dry land and the reduction of water content.
国家科技期刊平台
NSTL
万方数据
维普
