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以新疆阿克苏地区沟灌条件下的香梨为研究对象,使用HemiView数字植物冠层分析仪器,探讨梨树在不同生长时段,冠层截获的太阳辐射能、LAI的变化规律及其相互关系。结果表明:冠层截获的散射能、直射能、总辐射能随时间的变化幅度均不大,且差异性不显著;同一天,梨树冠层截获的总辐射能>直射能>散射能;随着梨树生育期的进行,LAI呈下降趋势;在整个试验阶段,晴天条件下,梨树冠层截获的散射能、直射能与LAI多呈显著性正相关,阴天条件下,各类型辐射能与LAI相关性均不显著。试验表明,截获散射能对LAI变化的影响最大,截获直射能对LAI的影响最小,截获总辐射能对LAI的作用关系不明显。
In this paper, the fragrant pear under the conditions of furrow irrigation in Aksu, Xinjiang was used as research object. The HemiView digital plant canopy analysis instrument was used to study the changes of solar radiation energy and LAI at different growth stages and canopy layers of pear trees. The results showed that the changes of the scattering energy, the direct energy and the total radiation energy intercepted by the canopy were not significant and the differences were insignificant. On the same day, the total radiant energy intercepted by the canopy canopy was higher than the direct energy and the scattering energy. During the growth period of pear tree, the LAI showed a decreasing trend. During the whole experiment stage, the scattering energy and direct energy intercepted by the canopy of pear under sunny conditions were significantly and positively correlated. Under the cloudy conditions, all kinds of radiant energy No correlation with LAI was found. The experimental results show that the interception of scattering energy has the greatest effect on the change of LAI, the direct impact of interception on LAI has the least influence, and the interception of total radiation has no obvious effect on LAI.