摘要
为了解侵蚀型红壤植被恢复后土壤生物学肥力的变化,采集了持续时间为17年和9年的2个定位试验点土壤样品。分析结果表明:侵蚀型红壤上木荷、杉木造林17年后,土壤微生物量碳、氮上升明显,木荷、杉木林表层(0～0.2m)土壤微生物碳、氮分别比对照增加了11.94,8.85,7.53,4.34倍。种植9年的黑麦草、杉木和胡柚3个处理表层土壤(0～0.2m)微生物量碳也比对照高出2.3～2.7倍,微生物量氮比对照高出0.7～1.4倍。从不同植被土壤比较来看,木荷、黑麦草土壤微生物碳氮比较低,表层土壤分别为7.03和7.24,而杉木土壤其微生物碳氮比相对较高,表层土分别为8.55(17年生)和8.68(9年生)。
The eroded red soil distributed in subtropical area has poor soil fertility. In order to find the changes in soil biological properties by vegetations recovery in eroded red soil, samples from two trial sites were collected. Soil microbial biomass carbon (MBC) and nitrogen (MBN) after 17 years growing of Schima superba and Chinese fir increased apparently, MBC(0~0.2m) were respectively enhanced 11.94,8.85 folds for Schima superbaand Chinese fir compared with control (no vegetation), and the corresponding MBN(0~0.2 m) were enhanced 7.53,4.34 folds. After 9 years growing of rye,Chinese fir and Citrus changshan(huyou), soil MBC(0~0.2 m) increased 2.3~2.7 folds compared with control, and corresponding MBN(0~0.2 m) increased 0.7~1.4 folds. The ratio of MBC and MBN of Schima superba and rye (7.03 and 7.24)were relatively lower than Chinese fir (8.55 for 17years and 8.68 for 9 years).
出处
《水土保持学报》
CSCD
北大核心
2003年第1期112-114,127,共4页
Journal of Soil and Water Conservation
基金
浙江省科技厅"十五"重点科技攻关项目(011102165)
关键词
侵蚀红壤
微生物量碳
氮
植被恢复
eroded red soil
microbial biomass carbon and nitrogen
vegetation recovery
