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苏北沿海不同土地利用方式土壤动物对有机氮矿化的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年04期
Page:
1-9
Column:
专题报道(Ⅰ)
publishdate:
2016-08-30

Article Info:/Info

Title:
Effect of soil fauna on organic nitrogen mineralization under different land use patterns in a coastal area of northern Jiangsu Province, China
Article ID:
1000-2006(2016)04-0001-09
Author(s):
ZHANG Wenwen1 YANG Baoling12 DONG Kejia1 ZHANG Yakun1 PENG Sai1 RUAN Honghua1* ZHENG Abao13 CAO Guohua4
1. Co-Innovation Center for the Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China;
2. Jiangsu Polytechnic College of Agriculture and Forestry, Jurong 212400, China;
3. Jiangsu Province Administration of Forestry, Nanjing 210036, China;
4. Dongtai County Forest Farm of Jiangsu Province, Dongtai 224200, China
Keywords:
land use patterns soil fauna net N mineralization rate coastal area of northern Jiangsu Province
Classification number :
S714.5
DOI:
10.3969/j.issn.1000-2006.2016.04.001
Document Code:
A
Abstract:
To understand the effect of soil fauna on nitrogen(N)mineralization under different land uses, we conducted experiments at three different land use patterns(i.e. poplar plantation, cropland and crop-poplar integrated system)with three treatments including control, nematodes exclusion and soil fauna exclusion in the coastal area of northern Jiangsu Province. The variations of soil net N mineralization rate were analyzed with a closed-up incubation method. The results showed that in three different land use patterns, the soil NO-3-N and total mineral nitrogen(TMN)contents in nematode and fauna exclusion treatments were all significantly lower than that in control, which indicated that the soil fauna and nematodes might significantly increase the contents of NO-3-N and TMN, while the content of NH+4-N had no significant difference.The pattern of land use, soil fauna groups and their quantities also affected the soil net N mineralization rate. In 0-10 cm soil layer of all the land use patterns, the net N mineralization rate of the control treatment decreased in the order of cropland, poplar plantation and crop-poplar integrated system. With nematode exclusion and fauna exclusion, the order changed to crop-poplar integrated system, cropland and poplar plantation. However, there was no significant difference for 10-25 cm soil layer of all land use patterns. When the poplar plantation and cropland were 0-10 cm in depth, nematode exclusion treatments led to a significant difference of net N mineralization rate when compared with the control group. Both nematode and soil fauna exclusion were found to be able to lower the net N mineralization rates. Moreover, the microbial biomass nitrogen contents in soil with fauna exclusion treatments were extreamly significantly lower than that in the control, which indicated that soil fauna exclusion might extreamly significantly influence soil microorganisms.

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Last Update: 2016-08-30