NGHIÊN CỨU HOÀN THIỆN QUY TRÌNH THỤ PHẤN BỔ SUNG CHO GIỐNG BƯỞI ĐẠI MINH TẠI HUYỆN YÊN BÌNH, TỈNH YÊN BÁI

To improve amd stablize the productivity of Dai Minh pummelo specific cultivar for its irregular bearing resulted from bad pollination and fertilization, a study on additional pollination techniques have been implemented in Yen Binh district, Yen Bai province. Results conducted from study showed that the yield of Dai Minh cultivar was remarkably improved when pollinated with the others in which “Buoi chua - sour pummelo” gave the best effect, then come to Chi Dam and “Latpo - big leaves” ones. It is also mentioned that hand pollination was considered to increase significantlyfruit setting whereas the utilization of anther and chalk power mixture at the rate of 1:4 was also suggested.