EVALUATING THE ADAPTATION OF CUTTINGS OF ROSA LAEVIGATA MICHX. WITH CLIMATE AND LAND IN THAI NGUYEN

Abstract

Kim anh (Rosa laevigata Michx.) is a basic tree that grows wild in southern China, after that they migrated to some provinces in Vietnam and Laos. Currently, in Vietnam the natural area of Rosa laevigata Michx  is only found in some districts of Cao Bang and Lang Son provinces, the border area with China. In 2017, with the desire to plant Rosa laevigata Michx in Thai Nguyen area in the future, cutting of Rosa laevigata Michx has been successful with branches picked from native Rosa laevigata Michx (in Trung Khanh district - Cao Bang province). However, it is necessary to continue to evaluate if Rosa laevigata Michx will be able to well adapt to the weather, climate as well as the soil in Thai Nguyen province. Therefore, this research is conducted in order to determine the   growth and development; flowering; and the fructification of the tree. By experimental method in the field, the following results were gained: Rosa laevigata Michx treesfrom cutting grow and develop very well: strong, long with big tree-trunks. The trees are free from pests and diseases, and have the good ability to grow new leaf buds. However, Rosa laevigata Michx trees from cuttings planted at Thai Nguyen are not capable of flowering and fructifying, like the ones planted in Trung Khanh - Cao Bang. The cause of this phenomenon was initially determined to be the climate (temperature) the time of flowering in Thai Nguyen that was not appropriate with the flowering of Rosa laevigata Michx.