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• 研究报告 • 上一篇    下一篇

施用沼液对苏北沿海杨树人工林土壤活性有机碳的影响

卜丹蓉1,周丹燕1,葛之葳1**,王国兵1,张文文1,彭赛1,阮宏华1**,曹国华2   

  1. 1南京林业大学生物与环境学院/南方现代林业协同创新中心, 南京 210037; 2江苏省东台市林场, 江苏东台 224200)
  • 出版日期:2015-07-10 发布日期:2015-07-10

Effects of biogas slurry on soil labile organic carbon of poplar plantation in a coastal area of northern Jiangsu, China.

BO Dan-rong1, ZHOU Dan-yan1, GE Zhi-wei1**, WANG Guo-bing1, ZHANG Wen-wen1, PENG Sai1, RUAN Hong-hua1**, CAO Guo-hua2   

  1. (1College of Biology and the Environment, Joint Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; 2Dongtai City Forest Farm of Jiangsu Province, Dongtai 224200, Jiangsu, China)
  • Online:2015-07-10 Published:2015-07-10

摘要:

以苏北沿海地区杨树人工林为研究对象,探讨沼液不同施用水平对土壤活性有机碳的影响。试验采用随机区组设计,设置了4种沼液施用水平,分别为CK(0 m3·hm-2)、L(125 m3·hm-2)、M(250 m3·hm-2)和H(375 m3·hm-2)。结果表明,施用沼液显著增加了土壤DOC含量,其中土壤DOC含量在中浓度沼液处理下达到最高,为228.97 mg·kg-1;施用沼液显著降低了土壤MBC;同时,施用沼液显著降低了土壤pH值,并显著增加了土壤NO3--N含量。相关分析表明,土壤pH与NO3--N呈显著负相关,而沼液中N以NH4+-N为主,表明沼液对土壤pH的影响可能与大量铵态氮的输入有关。沼液也显著增加了土壤MBN以及降低了土壤MBC/MBN,表明施用沼液也可能改变土壤的微生物群落的组成结构。
 

关键词: 样地, 森林动态, 天童, 系统发育树

Abstract:

To understand the effects of biogas slurry on soil labile organic carbon of poplar plantation in a coastal area, we designed four addition treatments of biogas slurry, i.e., CK (no addition), L (125 m3·hm-2), M (250 m3·hm-2) and H (375 m3·hm-2) at Dongtai Forest Farm in Jiangsu Province. The results showed that applying biogas slurry increased the concentration of dissolved organic carbon (DOC), while decreased soil microbial biomass carbon (MBC). Moreover, biogas slurry significantly decreased soil pH and increased NO3--N concentration. There was a significant negative correlation between pH and NO3--N concentration, whereas NH4+-N was mainly the form of N in biogas slurry, indicating that the change of pH might be caused by input of ammonium nitrogen. Biogas slurry also increased soil MBN and decreased soil MBC/MBN, suggesting changes in soil microbial community.
 

Key words: forest dynamic plot, Tiantong., phylogenetic structure