川南地区引种桃品种的需冷量研究

采用室内测定与田间栽培相结合，研究了92个桃品种的需冷量；研究了川南不同海拔高度地区0~7.2℃的有效低温量。结果表明：（1）供试品种之间需冷量差异较大，介于400~1300h之间，多数介于650~950h；花芽需冷量400~1300h，叶芽需冷量400~600h，同一品种花芽需冷量高于叶芽。（2）2003年12月至2004年2月果树休眠期间，川南海拔300m（李庄）地区有效低温量508h，海拔450m（南广）地区有效低温量748h，海拔650m（屏山富荣）地区有效低温量980h。

A Study on Chilling Requirement of Peach Varieties in South of Sichuan Basin

In this experiment, chilling requirements of 92varieties of peach are studied and 0~7.2℃ teperature of different altitude in south of Sichuan Basin had been recorded. Results showed :(1)Chilling requirements of the 91varieties of peach are from 400 hours to 1300 hours. A majority of the varieties’ chilling requirements are from 650 hours to 950 hours. Flower buds’ chilling requirements are usually more than those of leaf buds’ in the same variety. Flower buds’ chilling requirements of the varieties change from 400 hours to 1300 hours, while the leaf buds’ are from 400 hours to 600 hours.(2)There are about 508 hours of 0~7.2℃ temperature in Lizhuang (300meters altitude), 748 hours in Nanguang(450 meters altitude), and 980 hours in Pingshanfurong(650m altitude) from Dec, 2003 to Feb, 2004.