南京林业大学学报（自然科学版）2016，Vol.40Issue(4)：1-9,9.DOI:10.3969/j.issn.1000-2006.2016.04.001
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
Effect of soil fauna on organic nitrogen mineralization under different land use patterns in a coastal area of northern Jiangsu Province, China
摘要
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. Moreo⁃ver, 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.关键词
土地利用方式/土壤动物/净氮矿化速率/苏北沿海地区Key words
land use patterns/soil fauna/net N mineralization rate/coastal area of northern Jiangsu Province分类
农业科技引用本文复制引用
张文文,杨宝玲,董可嘉,张雅坤,彭赛,阮宏华,郑阿宝,曹国华..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[J].南京林业大学学报（自然科学版）,2016,40(4):1-9,9.基金项目
国家重点基础研究发展计划（2012CB416904）；江苏高校优势学科建设工程资助项目 （）
