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不同土地利用方式对潮棕壤微生物量碳及其周转率的影响

宇万太;姜子绍;周桦;马强   

  1. 中国科学院沈阳应用生态研究所, 沈阳 110016
  • 收稿日期:2007-12-28 修回日期:1900-01-01 出版日期:2008-08-10 发布日期:2008-08-10

Effect of different land use patterns on soil microbial biomass carbon and its turnover rate in an aquic soil.

YU Wan-tai; JIANG Zi-shao; ZHOU Hua, MA Qiang    

  1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2007-12-28 Revised:1900-01-01 Online:2008-08-10 Published:2008-08-10

摘要: 利用长期定位试验,研究了下辽河平原不同土地利用方式下潮棕壤土壤微生物量碳的变化。结果表明:裸地的微生物量碳最低;不施肥处理(CK)和NPK处理土壤微生物量碳较低;NPK配合猪厩肥处理(NPK+C)的微生物量碳显著高于CK和NPK处理;荒地由于返回的植物残体量很大,积累的有机物很多,所以其微生物量碳最大;其次为割草地和林地。不同土地利用方式的土壤微生物量周转速率为:NPK+C>林地>荒地>割草地>CK >NPK >裸地。

关键词: 小波变换, 杂古脑, 径流时间序列, 尺度

Abstract: A longterm fertilization experiment was conducted on an aquic brown soil in the lower reaches of Liaohe River plain to study the effects of different land use patterns on soil microbial biomass carbon (MBC). The results showed that in agroecosystem the MBC values decreased in the following order: integrated use of NPK and recycled manure >CK>NPK>bare land. A large numbers of plant residue returned to soil had increased the content of organic carbon and humic substances, resulting in a higher MBC in waste land. The content of MBC, either in woodland or in mowing land, decreased significantly than that of in wasteland. The rate of soil MBC was as follows: NPK+C>woodland>wasteland>mowing land>CK>NPK >bare land.

Key words: Wavelet transform, Zagunao watershed, Runoff time serial, Scale