采用野外人工抚育干扰方法，设置低、中、高3种强度人工抚育干扰试验组及对照，探讨油松人工林叶片光合作用对环境变化的生理响应。结果表明：人工干扰后主要环境因子（光照强度、空气相对湿度、大气温度、大气CO2摩尔分数）日变化均呈现“单峰”曲线，研究表明光照是限制油松净光合速率的关键因子；人工抚育干扰后，光饱和点、最大净光合速率、净光合速率日均值、暗呼吸、光补偿点均大于对照组，其中光饱和点、最大净光合速率、净光合速率日均值中等强度干扰下最大，且暗呼吸、光补偿点相对于对照组，中等强度干扰下变化最小；表观量子效率、叶绿素a和叶绿素b、总叶绿素质量分数在3种强度干扰下均小于对照组，并且中等强度干扰下最大。%By artificial tending interference, three levels of strength (low, medium and high) of experimental group and control group of artificial tending interference were set to investigate leaf photosynthetic of Pinus tabulaeformis plantation response to the change of environment .After artificial tending interference , the main environmental factors ( photosynthetic active radiation (RPA), air temperature (Ta), air relative humidity (RH) and atmospheric CO2 content) daily present single peak change, and the key factor to limit the net photosynthetic rate of P.tabulaeformis is light (p<0.01).Moreover, light saturation point ( LSP ) , maximum net photosynthetic rate, the mean value of net photosynthetic rate, light compensation point (LCP) and dark respiration (Rd) of the experimental group are greater than those of the control group, and under the medium level of artificial tending interference, the daily means of the first three indices are maximum, but the change of light compensation point (LCP) and dark respiration (Rd) are minimum.Apparent quantum efficiency (α), Chlorophyll a, Chlorophyll b and total chlorophyll of the experimental group are less affected than those of the control group, but the artificial tending interference is the most obvious one under the medium level.
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