两种桃树树形冠层参数变化及对产量和品质的影响

以‘京红’和‘久保’品种为试材,研究了"Y"字形和自然开心形2种树形的冠层参数变化以及对产量和果实品质的影响。结果表明:丰产优质桃园叶面积指数随新梢的生长迅速增加,于5月底至6月初达最大值,以后变化平缓;冠层透光比、冠下总直射辐射、总散射辐射和总辐射变化与叶面积指数变化趋势相反,均于5月底至6月初降到最小值,其后通过夏季修剪可维持适宜范围。2种树形间叶面积指数、冠层透光比、冠下光辐射及果实品质、产量指标均无显著差异。

The Changes in Canopy Parameters and the Effect of Yield and Quality by Two Kinds of Peach Tree Shape

With ’Beijing Red’ and ’Kubo’ peach fruit as materials,the changes in canopy parameters and the effect of yield and quality by peach tree shape(’Y’ shape and natural open shape) were studied.The results showed that in high-yield and high-quality orchards,leaf area index increased with the increase of new branch growth,and reached the maximum value from late May to early June,then changed gently.While the change trend of canopy light transmittance,total direct radiation,total scattering and total radiation under the canopy,which reached the minimum value from late May to early June,was opposite to that of leaf area index.And the change trend could stay at a suitable range after summer pruning.There was no obvious difference between the two kinds of peach tree shape in leaf area index,canopy light transmittance,radiation under the canopy,and the index of fruit quality and yield.