贺兰山东麓产区是我国最大的葡萄酒地理标志产品保护区。该地区属埋土越冬区，如果春季出土时期安排不合理会给酿酒葡萄生产带来重大损失：出土过早枝条容易抽干和遭遇晚霜冻害，过晚则冬芽在土内萌发，容易出现损伤和脱落。实际生产中，在葡萄出现土内萌芽前越迟出土越有利。预估葡萄出现土内萌芽的日期是合理安排出土作业的重要依据，目前这方面还以经验性判断为主，缺乏科学依据。土壤温度是影响酿酒葡萄冬芽能否顺利通过自然休眠并在土内萌发最关键的环境因素。本项目拟采用室内培养试验、大田试验、分区域野外调查等手段获取相关资料，经过对比优选，确定赤霞珠、美乐、黑比诺和霞多丽等主栽品种冬芽打破自然休眠的需冷量指标和萌发的生物学零度及需热量指标，揭示冬芽土内萌发的温度驱动机理，为利用气象资料预测土内萌芽日期，进而科学制定酿酒葡萄适宜出土作业计划提供理论依据。项目实施对保障贺兰山东麓地区酿酒葡萄产业健康稳定发展具有重要意义。

The eastern foot of Helan Mountain is the largest protection region of wine geographical indication product in China，was recognized as the optimum region for wine grape worldwide for unique soil and climate condition. The eastern foot of Helan Mountain belongs to soil-burying over-wintering zones ，and grapevine-excavation is one of the most important agricultural activities in spring. The excavation time is appropriate or not will have a significant impact on the growth and development of wine grape. On the one hand， it is easy to appear shoot shriveling harm when the excavation period is too early. On the other hand，when excavation is too late, the grape vine will germinate in the soil, which will cause the damage and withering of the sprouts. In actual production, excavation must be finished before germination occurs in soil. Predicting the date of grape germination in soil can provide basis for excavation plan. Temperature is the most critical environmental factor affecting the grape germination in soil. Based on the data obtained by field experiment, indoor simulation experiment and field investigation , the project will study the chilling requirement index of winter bud breaking natural dormancy, biological zero degree and heat requirement index of germinate on main winegrape cultivars such as Cabernet Sauvignon, Merlot, Pinot Noir and Chardonnay in the eastern foot of Helan mountain. Based the above research, we will reveal the temperature driving mechanism of winegrape germination in soil. In addition,this project will provide theoretical basis for plan grapevine-excavation scheduling、 climate suitability evaluation and introduction.