干旱地区农业研究2011，Vol.29Issue(5)：156-162,7.
干旱区绿洲棉田土壤呼吸日变化特征分析
Study on diurnal dynamic characteristic of soil respiration in oasis cotton field of arid area
摘要
Abstract
By using the O - 8100 Automated Soil CO2 Flux System, we determined the diurnal dynamic characteristic of soil respiration in oasis cotton field. The results indicated that: The diurnal fluctuation of soil respiration is charac terized by single-peaked curve, and the average rate of soil respiration of drip irrigation field, flood irrigation field and a bandoned farmland is 3.45, 3.37 μmol/(m2·s) and 1.63 fimol/(m2· s) respectively. In addition, the peak value of soil respiration occurrs at 15 = 00 - 20 = 00 (Beijing time), the valley value mainly occurrs at 4:00 ~ 6 = 00, there is a increasing tendency about the rate of soil respiration after 6:00. The diurnal changes of soil respiration are similar in different weathers, and the average daily value in fine day is higher than that in cloudy day, which is also higher in day than that at night. The rate of soil respiration changes fiercely during the day and falls slowly during the night. The average values of soil respiration rate during the day and night in cotton field are higher than those in abandoned farmland.关键词
干旱区/绿洲棉田/土壤呼吸/日变化Key words
arid area/ oasis cotton field/ soil respiration/ diurnal dynamic分类
农业科技引用本文复制引用
曹兴,陈荣毅,蔡新婷,王斯萌,蒋恒..干旱区绿洲棉田土壤呼吸日变化特征分析[J].干旱地区农业研究,2011,29(5):156-162,7.基金项目
中央级公益性科研院所基本科研业务费(IDM200705) （IDM200705）
新疆气象局项目(200825) （200825）
新疆气象局青年基金(201132) （201132）
