摘要
以半流动沙丘为对照,对5、10和22年生山竹岩黄蓍人工固沙群落不同层次(0~10、10~20 和 20~30 cm)土壤的养分状况、微生物生物量和土壤酶活性进行了对比研究.结果表明:采用山竹岩黄蓍固定流沙后,随着群落年龄的增长,土壤中C、N、P、K 含量及生物活性均明显提高.其中,0~10 cm土层的增长幅度显著高于10~30 cm土层.0~30 cm土层中C/N由7.3增加到8.5;土壤微生物生物量碳、氮、磷含量以及土壤脲酶、磷酸单酯酶、蔗糖酶、蛋白酶、脱氢酶、硝酸还原酶和多酚氧化酶的活性均有所提高.其中,0~10 cm土层中蔗糖酶的活性是对照的49.7~284.5倍.土壤微生物生物量碳、氮、磷分别与土壤有机碳、全氮、全磷以及微生物生物量与酶活性之间存在显著的正相关关系.
With adjacent semi-moving dune as the control, this paper studied the effects of 5-, 10- and 22-year old Hedysarum fruticosum plantations on the nutrient status, microbial biomass, and enzyme activities at the soil depths 0-10, 10-20 and 20-30 cm. The results showed that with the establishment of H. fruticosum plantation on moving dune, soil C, N, P and K contents and biological activities increased obviously with the increasing age of the plantation, and the increment was much higher at 0-10 cm than at 10-20 and 20-30 cm. At 0-30 cm, soil C/N increased from 7.3 to 8.5, and microbial biomass C, N and P as well as the activities of urease, protease, saccharase, phosphomonoesterase, dehydrogenase, polyphenol oxidase and nitrate reductase all increased. Among the test enzyme activities, saccharase activity had the most significant increase, with its value at 0-10 cm being 49. 7-284. 5 times of the control. There were significant positive correlations between soil microbial biomass C, N and P and organic C, total N and total P, respectively, and between soil microbial biomass and enzyme activities.
出处
《应用生态学报》
CAS
CSCD
北大核心
2007年第8期1739-1744,共6页
Chinese Journal of Applied Ecology
基金
国家科技支撑计划项目(2006BAD26B04)
辽宁省自然科学基金资助项目(20031013)
关键词
土壤生物活性
土壤酶
土壤微生物生物量
土壤养分
固沙群落
山竹岩黄蓍
soil biological activity
soil enzyme
soil microbial biomass
soil nutrient
sand-fixing community
Hedysarum fruticosum