Effects of biogas slurry and biochar application on active organic carbon in the topsoil of poplar plantation
Fertilization is an important measure in the management of plantation,and the disposal of biogas slurry and application of biochar attracted widespread attention recently.Interactive fertilizer efficiency experiment was carried out in the poplar plantation in northern Jiangsu.The content of nitrate & ammonium nitrogen in the concentration of biogas slurry were 0,125,250,375 m3/hm2 and biochar were 0,40,80,120 t/hm2.The results showed that:① application of biochar improved topsoil (0-10 cm) pH and promoted the nitrogen mineralization and nitrification in all concentrations of biogas slurry addition;② Application of biochar could increase soil active organic carbon,dissolved organic nitrogen and soil microbial biomass carbon and nitrogen ratios,which indicated that the microbial community had shift to fungi dominated;③ Significant interactive effects on soil active organic carbon and pH were observed between the applications of biogas slurry and biochar.Therefore mixed fertilizer of biogas slurry and biochar could promote the content of soil active organic carbon,improve soil fertility and enhance the productivity of plantation ecosystem.
poplar plantationbiogas slurrybiocharsoil active organic carbon
国家科技期刊平台
NSTL
万方数据
维普
