11种红千层田间耐寒试验及综合评价

Field Cold Tolerance Test and Comprehensive Evaluation of 11 Species of Callistemon

为了进一步在舟山地区绿化中推广红千层,选择引进多年的11个红千层品种,取3a生扦插苗进行本地冬季露地越冬试验,验证不同品种的耐寒性。在低温天气过后和翌年春季调查红千层叶、枝、主杆、根系等部位,统计受冻部位数据并进行计算分析,划分冻害等级,制定冻害指标计算公式,按照冻害等级对11个品种的耐寒性进行综合评价。通过试验结果可知,其抗寒水平由强到弱依次为:高山、刚直、李维斯粉、多花、帝王、马索蒂、光彩照人、美花、串钱柳、火焰、小约翰,该试验结果为红千层的选择提供了理论依据。

In order to further popularize Callistemon in the greening of Zhoushan area,11 varieties of Callistemon introduced for many years were selected,and 3a cuttings were taken for the local winter open field overwintering test to verify the cold resistance of different varieties.After the low-temperature weather and the following spring,investigate the leaves,branches,main stems,roots and other parts of Callistemon,count the data of frozen parts,calculate and analyze them,divide the frost damage grade,formulate the calculation formula of frost damage index,and comprehensively evaluate the cold resistance of 11 varieties according to the frost damage grade.According to the test results,the cold resistance level from strong to weak is:Gaoshan,Gangzhi,Levi’s powder,Duohua,Emperor,Masotti,Guangcaizhaoren,Meihua,Chuanqianliu,Flame,Little John,the test results provide a theoretical basis for the selection of Callistemon.