CAJ | 학술논문

采用动态红外气体分析法研究了两个不同年龄兴安落叶松(Larix gmelinii Rupr.)人工林内落叶松树干呼吸速率的季节变化,并分析了树干呼吸速率与环境因子的关系.两个年龄落叶松树干呼吸速率均是从春季到夏季逐渐升高,高峰值出现在7月(成熟林)和8月份(幼林),之后明显下降.幼林落叶松的树干呼吸速率(变化范围是1.99～6.15 μmol*m-2*s-1)显著高于成熟林(变化范围是1.52～3.38 μmol*m-2*s-1)(P<0.05).树干温度对树干呼吸影响较大,树干呼吸速率与树干温度呈指数相关关系;成熟林和幼林树干呼吸的Q10值分别为1.96和3.44.当空气相对湿度较低时,树干呼吸速率与其关系无明显规律,但当空气相对湿度很高时,能大大促进树干的呼吸作用.
채용동태홍외기체분석법연구료량개불동년령흥안락협송(Larix gmelinii Rupr.)인공림내락협송수간호흡속솔적계절변화,병분석료수간호흡속솔여배경인자적관계.량개년령락협송수간호흡속솔균시종춘계도하계축점승고,고봉치출현재7월(성숙림)화8월빈(유림),지후명현하강.유림락협송적수간호흡속솔(변화범위시1.99～6.15 μmol*m-2*s-1)현저고우성숙림(변화범위시1.52～3.38 μmol*m-2*s-1)(P<0.05).수간온도대수간호흡영향교대,수간호흡속솔여수간온도정지수상관관계;성숙림화유림수간호흡적Q10치분별위1.96화3.44.당공기상대습도교저시,수간호흡속솔여기관계무명현규률,단당공기상대습도흔고시,능대대촉진수간적호흡작용.
By using a dynamic IRGA method, seasonal changes of stem respiration rate in two larch plantations with different ages were studied. Relationship between stem respiration rate and environmental factors were analyzed. Stem respiration rates of larches of both ages increased during spring and summer, and peaked in July (the mature forest) and August (the young forest). During autumn, stem respiration rates declined sharply. Stem respiration rate of the young larch stand, ranged from 1.99 to 6.15 μmol*m-2*s-1, was significantly higher than that of the mature larch stand, ranged from 1.52 to 3.38 μmol*m-2*s-1 (P<0.05).There was an exponential correlation between stem respiration rate and stem temperature. The temperature coefficient Q10values for stem respiration of the mature forest and the young forest were 1.96 and 3.44 respectively. There was no obvious regularity between stem respiration rate and relative humidity at the lower atmospheric relative humidity,however, stem respiration was apparently promoted at higher relative humidity range.