主干形桃树对光截获能力和果实产量品质的影响

以6a生八月脆桃为试材,在果实成熟期观测分析了2种树形(主干形和开心形)对光截获能力和果实产量及品质的影响。结果表明,2种树形同一层次的平均单果质量、着色指数、光洁度差异不显著;果实硬度和可溶性固形物有显著差异,果实硬度表现为主干形﹥开心形,可溶性固形物则表现为开心形﹥主干形。对光截获能力的影响表现为主干形>开心形;叶面积指数、果实产量指标均表现为主干形高于开心形;果实产量是开心形的2.11倍。桃树主干形是高光效、高产树形。

Effects of the central leader tree form on the light interception ability, fruit yield and quality of peach

Experiment was conducted with 6-year-old trees of Bayuecui peach cultivar trained with central leader (CL) form for studying the effect of tree form on the light interception ability,fruit quality and yield, which was compared with the open central form (OC). The results showed that the average fruit weight, the skin colored rate and the skin brightness exhibited no difference between them. The index of soluble solids content was CL﹤OC, and the fruit hardness was CL >OC. The light in- terception ability of CL was better than that of OC, the leaf area index and fruit yield were CL>OC. The yield of CL was al- most 2.11 times the OC. The results also elucidated that the CL training system displayed higher than that of the OC in light interception ability and yield.