模拟气候变化条件下太湖地区典型农田氮素的动态变化  

Soil Nitrogen Dynamic Changes in Typical Farmland of Taihu Region Under Simulating Climate Change

作　　者：虞凯浩 陈效民[1] 陈旭[1] 潘根兴[1] 张旭辉[1] 

机构地区：[1]南京农业大学资源与环境科学学院,南京210095 [2]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京210095

出　　处：《水土保持学报》2015年第1期96-100,230,共6页Journal of Soil and Water Conservation

基　　金：公益性行业(农业)科研专项经费项目(200903003);土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)项目(0812201208)

摘　　要：在当前气候变化情景下,基于T-FACE(temperature-free air carbon dioxide enrichment)平台升高温度和CO2浓度,连续3a在小麦生长季对太湖地区典型土壤——乌栅土耕作层中无机氮素的动态变化进行了研究。结果表明:在小麦3个生长季内土壤中NH+4-N的含量表现为先降低后升高;温度升高、CO2浓度升高和CO2浓度与温度同时升高的交互作用会导致土壤中NH+4-N含量降低,并且时间越长,影响效果越明显;在小麦3个生长季内土壤中NO-3-N的含量没有明显变化规律;CO2浓度升高和CO2浓度与温度同时升高的交互作用也能降低土壤中NO-3-N的含量;温度对土壤中NO-3-N含量的影响没有显著规律性;常规处理和CO2浓度升高处理的土壤中NH+4-N和NO-3-N的含量有显著和极显著相关关系,相关系数分别为0.538(p<0.05),0.725(p<0.01)。Based on T-FACE platform to elevate the temperature and CO2 concentration under current climate change scenarios,the inorganic nitrogen contents in soils were measured to investigate the variation tendency in plough layer of the typical soil（Wushan soil）in Taihu region in wheat growing season for three consecutive years.The experimental results showed that：The soil NH＋4-N content increased at first and then decreased in the three wheat growing seasons.The temperature elevated,CO2 concentration elevated and the interaction of CO2 concentration and temperature elevated led to the NH＋4-N content decreased and the effect was stronger with time.The soil NO-3-N content had no significant variation in the three wheat growing seasons.The CO2 concentration elevated and the interaction of CO2 concentration and temperature elevated could also decrease the soil NO-3-N content.The NO-3-N content showed no clear variation under elevating temperature treatment.The soil NH＋4-N and NO-3-N contents under the ambient and CO2 concentration elevated treatments had significant correlations,and the correlation coefficients were 0.538（p〈0.05）and 0.725（p〈0.01）respectively.

关 键 词：气候变化 太湖地区 温度升高 CO2浓度升高 氮 

分 类 号：S158.3[农业科学—土壤学]