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

doi:10.3969/j.issn.1000-2006.2016.04.001

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南京林业大学学报（自然科学版） ›› 2016, Vol. 40 ›› Issue (04): 1-9.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

张文文¹,杨宝玲^1,2,董可嘉¹,张雅坤¹,彭赛¹,阮宏华^1*,郑阿宝^1,3,曹国华⁴

1.南方现代林业协同创新中心,南京林业大学生物与环境学院,江苏南京 210037;
2.江苏农林职业技术学院,江苏句容 212400;
3.江苏省林业局,江苏南京 210036;
4.江苏省东台林场,江苏东台 224200

出版日期:2016-08-18 发布日期:2016-08-18
基金资助:
收稿日期:2015-07-09 修回日期:2015-12-08
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(PAPD)
第一作者:张文文(462388565@qq.com)。*通信作者:阮宏华(hhruan@njfu.edu.cn),教授。
引文格式:张文文,杨宝玲,董可嘉,等. 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.

Effect of soil fauna on organic nitrogen mineralization under different land use patterns in a coastal area of northern Jiangsu Province, China

ZHANG Wenwen¹, YANG Baoling^1,2, DONG Kejia¹, ZHANG Yakun¹, PENG Sai¹, RUAN Honghua^1*, ZHENG Abao^1,3, 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

Online:2016-08-18 Published:2016-08-18

摘要/Abstract

摘要： 土壤动物是陆地生态系统的重要组成部分,为探讨不同土地利用类型土壤动物对土壤氮矿化过程的影响,以苏北沿海地区3种土地利用方式(杨树人工林、农田、杨农复合林)为研究对象,通过设置不同实验处理(对照、撒噻唑磷驱除土壤线虫、撒萘驱除所有土壤动物),采用顶盖埋管法测定土壤矿质氮的含量,分析了土壤动物对有机氮矿化速率的影响。结果表明:①3种土地利用类型驱除土壤线虫和驱除所有土壤动物处理的土壤NO^-₃-N 和总无机氮(TMN)含量均显著低于对照(P<0.05),说明土壤线虫和土壤动物的存在能显著提高土壤中NO^-₃-N和总无机氮的含量; 而NH⁺₄-N含量变化不明显。②土地利用类型和土壤动物类群数量的改变会影响土壤净氮矿化速率; 0～10 cm土层,对照处理土壤净氮矿化速率从大到小表现为农田>杨树林>杨农复合林,驱除线虫和驱除所有土壤动物处理下均表现为杨农复合林>农田>杨树林; 各处理≥10～25 cm土层动物变化不显著。且0～10 cm对照和驱除线虫处理,杨树林与农田间土壤净氮矿化速率差异显著(P<0.05,P<0.01)。驱除线虫和驱除所有土壤动物均能降低土壤净氮矿化速率(P<0.05)。③驱除所有土壤动物处理的土壤微生物量氮的含量极显著低于对照(P<0.01),表明驱除土壤动物对土壤微生物有极显著的影响。

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.

中图分类号:

S714.5

张文文,杨宝玲,董可嘉,等. 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(04): 1-9.

ZHANG Wenwen, YANG Baoling, DONG Kejia, ZHANG Yakun, PENG Sai, RUAN Honghua, ZHENG Abao, CAO Guohua. Effect of soil fauna on organic nitrogen mineralization under different land use patterns in a coastal area of northern Jiangsu Province, China[J].Journal of Nanjing Forestry University (Natural Science Edition), 2016, 40(04): 1-9.DOI: 10.3969/j.issn.1000-2006.2016.04.001.

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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

Effect of soil fauna on organic nitrogen mineralization under different land use patterns in a coastal area of northern Jiangsu Province, China

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