Different stages of bearing branch pinching was studied ,we employed the new variety of Vitis amurensis Rupr .“Xuelanhong”as mate-rials .The results showed that different stages of pinching treatment had significant effects on fruit set ,fruit weight ,yield and downy mildew resis-tance .And the best effects of pinching treatment were flowering before the seventh day and tenth day ,these fruits set were 37.2% and 36.9%respectively ,which were better than other treatments ,and so did these fruit weight ,yield and downy mildew resistance .Therefore ,the best pinching stage for Vitis amurensis Rupr .“Xuelanhong”was flowering before the seventh to tenth day .%本试验以酿造干红山葡萄酒新品种“雪兰红”为试材，进行结果枝不同时期摘心试验。结果表明，不同摘心时期对花朵坐果率、果实重量、产量及霜霉病抗性等具有显著影响。其中，花前7d和10d摘心处理效果最好，花朵坐果率分别为37.2％和36.9％，明显优于其他处理，果实重量、产量和霜霉病抗性也明显优于其他处理。因此，“雪兰红”品种适宜的摘心时期为开花前7d～10d。
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