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当前位置: 首页 > 文章 > 昭苏山地草甸不同土地利用方式下的土壤呼吸特征及其水热关系的比较研究 中国草地学报 2017 (5) 76-83
Position: Home > Articles > Comparative Studies on Soil Respiration Characteristics and Relationship between Water Contents and Temperature under Different Utilization Ways in Mountain Meadow Soil in Zhaosu Chinese Journal of Grassland 2017 (5) 76-83

昭苏山地草甸不同土地利用方式下的土壤呼吸特征及其水热关系的比较研究

作  者：
王祥;郑伟;朱亚琼;关正翾;唐高溶
单  位：
新疆农业大学草业与环境科学学院;新疆维吾尔自治区草地资源与生态重点实验室
关键词：
土壤呼吸;农田;豆禾混播草地;补播草地;温度敏感指数;水热关系
摘  要：
为探讨不同土地利用方式对新疆昭苏马场山地草甸土壤呼吸速率的影响,对补播草地(RG)、豆禾混播草地(LG)、天然草地(NG)和农田(CR)进行测定,并分析了土壤呼吸速率与其影响因子间的关系。结果表明:(1)不同利用方式下各样地土壤呼吸日变化均随温度变化呈现出先增加后降低的变化态势,峰值在当地正午时分;月变化在2015年NG和CR呈现双峰值,RG和LG呈现单峰线,各处理均在8月小麦结实期达到最大值;2016年各处理出现峰值的时间不同,RG和LG在小麦的分蘖期达到最大值,NG和CR在小麦开花期达到最大值。(2)监测期内平均土壤呼吸速率由大到小为:NG、RG、CR、LG;各样地土壤呼吸CO_2排放量为:NG>CR>RG>LG。(3)各样地土壤呼吸速率与土壤温度呈指数正相关,与体积含水量呈线性负相关,2015年Q_(10)值排序为RG>CR>NG>LG,2016为NG>LG>CR>RG。因此,补播和建植人工草地降低了土壤呼吸速率,使草地生态系统水热关系更加协调,减少了碳排放量,是昭苏地区退化草地生态恢复较好的选择。
译  名：
Comparative Studies on Soil Respiration Characteristics and Relationship between Water Contents and Temperature under Different Utilization Ways in Mountain Meadow Soil in Zhaosu
作  者：
WANG Xiang;ZHENG Wei;ZHU Ya-qing;GUAN Zheng-xuan;TANG Gao-rong;College of Pratacultural and Environmental Science,Xinjiang Agricultural University;Xinjiang Key Laboratory of Grassland Resources and Ecology;
关键词：
Soil respiration;;Cropland;;Legume-grass mixture;;Reseeding grassland;;Q_(10);;Relationship of soil water and temperature
摘  要：
To research soil respiration rate under different utilization ways in mountain meadow soil in Zhaosu,Soil respiration rates under four different treatments,legume-grass mixture(LG),reseeded grass(RG),natural grassland(NG),cropland(CR),were measured using Li-8100 open circuit soil C Flux measuring system in April to September 2015 and April to September 2016.The results showed that:(1)Daily variation of soil respiration showed a trend of increase first and then decrease with the temperature change,the peak appeared at noon in the local time.Changes in NG and RG presented double peak in 2015,RG and LG presented single-peak line.In 2016,the treatments of peak time was different,the peak values in RG and LG presented at wheat tillering stage,but the peak value in NG and CR presented in wheat flowering period.(2)During the monitoring period,the average soil respiration rate from big to small was:NG,RG,CR,LG.The soil CO_2 emissions were:NG> CR> RG> LG.(3)All kinds of soil respiration rate and soil temperature presented an exponential positive correlation and presented linear negative correlation with soil volumetric water content(SWC),Q10 in 2015 from big to small was:RG>CR>NG>LG and NG>LG>CR>RG in 2016.Therefore,the replanting and planting of artificial grassland reduced the soil respiration rate,so that the relationship between water and heat of grassland ecosystems was more coordinated and the carbon emission was reduced.It was a better choice for ecological restoration of degraded grassland in Zhaosu area.

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