不同主枝开张角度下轮台白杏树冠微域气候及生长结果差异分析

Effects of Different Branch Bending Angles on the Canopy Microclimate and Growth and Fruiting of Luntai White Apricot

以5a生轮台白杏为试材,研究了树体整形过程中主枝开张角度对树冠微域气候和生长结果的影响,以期为合理整形修剪提供参考依据。结果表明:主枝的不同开张角度对轮台白杏冠层的光合有效辐射强度(PAR)、坐果率和单株产量有显著影响。60°开张角度树冠内的光照较为充足,树冠内的温度相对较高,树冠内的湿度均明显低于自然生长形态,略低于30°开张角度;60°的主枝角度在提高轮台白杏新梢生长量、坐果率和单株产量方面相对于自然形态和30°开张角度的效果最好。该试验结果表明在轮台白杏整形过程中,主枝开张角度以60°左右为宜。

Taking 5-year-old Luntai White Apricot as material, the effect of different branch bending angles on canopy microclimate and growth and fruiting of Luntai White Apricot were studied,in order to provide a reference for pruning. The results showed that different branch bending angles had significant influence on PAR,fruit-setting rate and yield of per plant. Canopy had good light condition and relative high temperature when the angle of branch was 60°, but humidity was lower than other angles. New branch growth,fruit-setting rate,yield per plant in 60° were markedly higher than that of the other angles. Experiment showed that the main branch bending angle in 60° was suitable for pruning Luntai White Apricot.