NGHIÊN CỨU NHÂN GIỐNG CÂY LÊ VH6 BẰNG PHƯƠNG PHÁP GHÉP TẠI TỈNH SƠN LA

Abstract

The VH6 pear tree is a fruit tree with high economic value, and has been grown in the highland areas in Son La and the Northwest provinces. However, the propagation VH6 pear seedlings by grafted with suitable for natural conditions in the Northwest region has not been researched. In this study, we researched the propagation of grafted VH6 pear trees, using rootstock of the native fruit tree (Pyrus granulosa) and scions from VH6 pear trees that have been recognized as fruit varieties in Son La province. One-factor experiment on grafting types as well as the length of grafted cutting was implemented to compare the survival rate and growth in diameter and height of grafted cuttings. The results revealed that after 6 months grafted, both grafting methods have a high survival rate of grafted cuttings > 96%, the survival rate of grafted cuttings has no significant difference between the two grafting methods (Sig.> 0,05), however, the growth in diameter and height of the grafted buds of the slice grafting method was greater after 6 months of grafting (sig. < 0.05), reaching an average of 0.76 cm in diameter and 70.26 cm in height. Experiments on the length of grafted cuttings showed that grafting lengths of 6-7cm have the highest average survival rate of grafted cuttings reaching 96.67% and 0.78 cm in diameter and 71.90 cm in height. From the initial research results has been shown that using the native fruit tree (Pyrus granulosa) as rootstock and the slice grafting method as well as the length of grafting cuttings from 6-7cm was suitable for propagating VH6 pear trees in Son La province.