Liu Yuan-qiu, Wang Fang, Ke Guo-qing, Wang Ying-ying, Guo Shen-mao, Fan Cheng-fang
College of Forestry, Jiangxi Agricultural University, Nangchang 330045, China.
Ying Yong Sheng Tai Xue Bao. 2011 Apr;22(4):885-90.
Taking the forest lands having been converted from cultivated land for 5 years in Ruichang City of Jiangxi Province as test objects, this paper studied the characteristics of soil organic carbon (SOC) under 4 different conversion models (forest-seedling integration, pure medicinal forest, bamboo-broadleaved mixed forest, and multi-species mixed forest). After the conversion from cultivated land into forestlands, the contents of SOC, microbial biomass carbon (MBC), and mineralizable carbon (PMC) in 0-20 cm soil layer increased by 24.4%, 29%, and 18.4%, respectively, compared with those under the conversion from cultivated land into wasteland (P < 0.05), which indicated that the conversion from cultivated land into forest lands significantly increased the SOC content and SOC storage. The SOC, MBC, and PMC contents in 0-10 cm soil layer were significantly higher than those in 10-20 cm soil layer (P < 0.01), and the differences between the soil layers of the four forest lands were higher than those of the wasteland. Among the 4 conversion models, forest-seedling integration had more obvious effects on SOC.
以江西省瑞昌市5年前由耕地转变而来的林地为试验对象，研究了4种不同转变模式（林苗一体化、纯药用林、毛竹阔叶混交林和多树种混交林）下土壤有机碳（SOC）的特征。从耕地转变为林地后，0 - 20 cm土层中SOC、微生物量碳（MBC）和可矿化碳（PMC）的含量分别比从耕地转变为荒地的高24.4%、29%和18.4%（P < 0.05），这表明从耕地转变为林地显著增加了SOC含量和SOC储量。0 - 10 cm土层中SOC、MBC和PMC含量显著高于10 - 20 cm土层（P < 0.01），且4种林地土层间的差异高于荒地。在4种转变模式中，林苗一体化对SOC的影响更为明显。
