摘要
为阐明不同绿肥施用对茶园土壤有机碳矿化的影响,设置绿肥添加室内培育试验观测了培养过程中土壤有机碳的矿化动态,通过拟合一级动力学方程模拟土壤有机碳矿化情况。试验表明,整个培养过程,土壤有机碳矿化速率前期迅速下降,培养中期缓慢下降,培养后期趋于稳定状态。施入绿肥的土壤与不施肥和单纯施用化肥相比,具有更高的微生物活性,进而使土壤平均矿化速率提高了2.8%-110.3%;但随着绿肥施用量的增加,土壤潜在可矿化C量占总有机碳的比例并未显著增加,仅能说明通过施用绿肥可增加茶园土壤有机碳的积累。
Effect of the application of a green manure of legume waste on the organic carbon mineralization in soil （SOCM） of tea plantations was studied by using a simulated cultivation in the laboratory. Red soil with the fertilization was incubated to observe the organic carbon mineralization dynamics, which was found to fit a first- order kinetic model. The rate of SOCM decreased rapidly initially, then continued to decline slowly in the middle of the incubation, and stabilized at the final stage. Compared to the treatments without fertilization or with a chemical manure, the application of the green manure improved the microbial activity in the soil, and increased the average SOCM by 2. 8% to 110. 3%. However, no significant increase was observed by increasing the amount of the green manure on the proportion of the potential carbon mineralization to the total organic carbon. It was concluded that application of the green manure could increase the accumulation of organic carbon in soil at tea plantations.
出处
《茶叶学报》
2016年第3期133-137,共5页
Acta Tea Sinica
基金
福建省科技计划项目(2014R1017-3
2014Y0048)
国家科技支撑计划课题(2012BAD14B03)
关键词
茶园
绿肥
土壤有机碳
矿化
tea plantation
green manure
soil organic carbon
mineralization
