【摘要】 在12 a生梨树高光效开心树形果园进行了隔行间伐试验,测定了树冠外围及树冠中部投影下方的果园地面太阳辐射强度。结果表明,成龄梨园隔行间伐后,9:00—17:00果园地面太阳辐射强度比未间伐果园(对照)均显著增加,全天平均增加了1.65倍;果园间伐后外围地面太阳辐射有不同程度增加,其中,南侧太阳辐射增加幅度最大,北侧次之,东侧、西侧、南侧及北侧地面全天太阳辐射总量分别为对照的2.44,2.11,4.71和2.79倍;树盘中部地面相应方位全天太阳辐射总量分别为对照的1.85,1.82,2.60和2.34倍;间伐处理和对照果园全天太阳辐射透射率分别为30.42%和7.68%。更多还原

【Abstract】 Open-center training system had been carried out at tree-thinning 12 years old pear orchard of high light efficiency,and the intensity of solar radiation on orchard ground was determined in early June in 2010.The results showed that the solar radiation intensity on ground increased significantly after tree-thinning and the mean value increased by 1.65 times from 9:00 to 17:00 in day.The solar radiation intensity at the peripheral ground increased significantly after tree-thinning,which was the biggest in the south,and then followed the north.The cumulative value in the east,west,south and north grounds was 2.44,2.11,4.71 and 2.79 times as the control in day and the cumulative value at the orchard ground was 1.85,1.82,2.60 and 2.34 times as the control.The transmittance at the tree-thinning and control orchards were 30.42% and 7.68% in day.更多还原