520A砧木对4个葡萄品种越冬及结果的影响

Effects of rootstock 520A on overwintering and fruiting of four grape cultivars

研究了"梅鹿辄"、"贵人香"、"乍娜"和"红地球"4个葡萄品种嫁接在520A砧木上的光合作用日变化情况及其在兰州不埋土的越冬和结果表现.试验表明:520A砧木能提高"梅鹿辄"、"贵人香"、"乍娜"3个葡萄品种的越冬能力和产量,品质表现良好;但520A砧木不能提高"红地球"的越冬能力,且能引起"红地球"地上部分冻害甚至死亡.嫁接在520A砧木上的"梅鹿辄"、"贵人香"、"乍娜"的光合作用日变化虽存在差异,但均属于中午降低型.据此认为,520A是一种在北方地区具有推广价值的抗寒砧木.

The performances of non-hilled overwintering and fruiting of Merlot,Italian Riesling,Cardinal（Zana） and Red Globe grape grafted onto the rootstock 520A were studied and their diurnal variation of photosynthesis were measured in Lanzhou. The result indicated as follow： in the non-hilled situation, root- stock 520A could improve overwintering abilities and yield of Merlot, Italian Riesling, Zana,and not effect their friut quality. But to Red Globe,it could not improve overwintering ability. Although there existed the difference in diurnal variation, the photosynthesis of grafted Merlot Nior, Italy Riesling and Zana were all the midday-depression type.