淮北地区5种不同植物群落土壤呼吸研究  

Study on Soil Respiration of Five Plant Communities in North of Huai River

作　　者：刘斌[1,2] 鲁绍伟[2] 石媛[1] 李少宁[2] 陈波[2] 

机构地区：[1]河北农业大学林学院,河北保定071000 [2]北京市农林科学院林业果树研究所,北京100093

出　　处：《水土保持研究》2015年第4期100-106,112,共8页Research of Soil and Water Conservation

基　　金：林业公益性行业科研专项"森林生态服务功能分布式定位观测与模型模拟"(201204101)

摘　　要：选取河南西平杨树人工林生态系统中5种不同植物群落土地为研究对象,利用Licor-8100土壤呼吸测定系统对其土壤呼吸进行了连续观测,分析、比较5种不同植物群落土壤呼吸的差异及其影响因素。研究结果表明：（1）5种植物群落下土壤呼吸有所差异,但其日变化及年内变化趋势大致相同,均与土壤温度变化趋势一致,呈单峰曲线,其土壤呼吸大小顺序为：8m行宽林间小藜—牛筋草地〉2m行宽林间苍耳地〉8m行宽林间水蓼—灰灰菜地〉8m行宽林间苍耳地〉2m行宽林间裸地;（2）采用土壤温度和湿度单因素模型（Rs=aebTs或Rs=aW＋b）进行分析：土壤温度和土壤含水量分别解释了不同植物群落土壤呼吸季节变化的41%~79%和2.3%~21%;而采用双因素模型分析（Rs=aebTsWc）,土壤温湿度共同解释了土壤呼吸速率季节变化的49.1%~86.7%,表明不同植物群落的土壤呼吸均受土壤温度和土壤含水量的共同影响;（3）运用Q10=e10b模型分析,Q10值大小顺序为：8m行宽林间小藜—牛筋草地（2.47）〉2m行宽林间苍耳地（2.3）〉2m行宽林间裸地（2.7）〉8m行宽林间水蓼—灰灰菜地（2.59）〉8m行宽林间苍耳地（2.22）,且5种不同植物群落下土壤呼吸Q10值均表现为春季〉冬季〉秋季〉夏季,即土壤呼吸温度敏感性随着温度的升高呈现出降低的趋势。We studied the soil respiration of five plant communities in poplar plantation ecosystem in Xiping of He＇nan Province by an automated soil CO2 efflux measurement system （LI-8100, LI-COR, I.incoln, NE, USA）, and compared their differences of soil respiration and analyzed its affecting factors. The results showed that： （1） the soil respiration of five plant communities was significantly different, diurnal variation and annual variation of soil respiration had the same tendency with the unimodal curve, and soil temperature variation followed with soil respiration. The sequence of soil respiration was： 8 m wide woodland with Chenopodium serotinum Eleusine indica （L）. Gaertn 〉2 m wide woodland with Xanthium sibiricum Patrin 〉8 m wide woodland with Polygonum hydropiper-Chenopodium album Linn ）8 m wide woodland with Xanthium sibiricum Patrin 〉2 m wide woodland with nothing except a little litter; （2） single factor model was used to analyze the effect of soil temperature and moisture on the soil respiration （Rs =ae^bT, or R, = aW ＋b）： soil temperature and moisture gave the explanation of 41%-79% and 2.3%-21% of seasonal variations of （2.47） 〉2 m wide woodland with Xanthium cept a little litter （2.7） 〉8 m wide woodland sibiricum Patrin （2.3） 〉2 m wide woodland with nothing ex- with Polygonum hydropiper-Chenopodium album Linn （2.59）〉8 m wide woodland with Xanthium sibiricum Patrin （2. 22）, and seasonal variation of Q10 value was. spring〉winter〉autumn〉summer, indicating that temperature sensitivity of soil respiration would decrease with rise of soil temperature.

关 键 词：土壤呼吸 不同植物群落 Q10值 土壤温度 

分 类 号：S154.1[农业科学—土壤学] S181[农业科学—农业基础科学]