ZHOU Lili
Institute of Oceanography, Minjiang University, Fuzhou 350108, China;Chinese fir Engineering Technology Research Center, State Forestry and Grassland Administration, Fuzhou 350002, ChinaLI Shubin
Chinese fir Engineering Technology Research Center, State Forestry and Grassland Administration, Fuzhou 350002, China;College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaPAN Hui
Institute of Oceanography, Minjiang University, Fuzhou 350108, ChinaWANG Wanping
Chinese fir Engineering Technology Research Center, State Forestry and Grassland Administration, Fuzhou 350002, China;College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaWU Yalan
College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350108, ChinaZHENG Ruping
Chinese fir Engineering Technology Research Center, State Forestry and Grassland Administration, Fuzhou 350002, China;College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaIn order to reveal the enzymatic mechanism of soil nutrient transformation, the soil nutrient contents and enzyme activities in plantations, such as nitrogen-fixing tree species (Acacia crassicarpa, A. melanoxylon, A. cincinnata, A. auriculiformis, A. mangium) and non-nitrogen-fixing species (Eucalyptus urophylla×E. grandis) were studied, and their relationships were analyzed. The results showed that the pH in 40-60 cm soil of Acacia plantations were higher than that in E. urophylla×E. grandis plantation, which total P and K contents at all soil layers were lower than those in E. urophylla×E. grandis plantation, while total C and total N contents at 20-40 cm soil were high in Acacia plantations. Soil available nutrients contents were significantly higher in A. melanoxylon and A. mangium than those in E. urophylla×E. grandis plantation (P<0.05). Compared to E. urophylla×E. grandis plantation, the acid phosphatase and cellulase activities at 0-10 cm soil layer were high in Acacia plantations, which the activities of soil urease, sucrase, cellulase and aryl sulfatase were the highest in A. auriculiformis plantation (P<0.05); the activities of soil urease, cellulose, chitinase and amylase were the highest in A. cincinnata plantation (P<0.05). Correlation analysis revealed that the activities of soil urease, sucrase and chitinase were significantly negative to soil AP (P<0.05); the activities of soil sucrase and cellulase were signifi-cantly negative to soil NH4+-N; the activities of soil urease, cellulase and aryl sulfatase were significantly negative to soil TK; the activities of soil chitinase were significantly positively to soil TN; the activities of soil amylase were significantly positively to soil NH4+-N; the activities of soil catalase were significantly positively to soil TK. Therefore, compared to E. urophylla×E. grandis plantation, the introduced Acacia species to soil degraded mountains in southern China could improve key soil enzyme activities and soil available nutrients, which was beneficial to the eco-restoration of degraded soil and the maintenance of long-term productivity of plantations.
周丽丽,李树斌,潘辉,王万萍,吴亚岚,郑茹萍.5种相思树和尾巨桉人工林土壤养分和酶活性特征[J].热带亚热带植物学报,2021,29(5):483~493
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