电解质渗出率配合Logistic方程鉴定7个平欧杂种榛品种(系)的抗寒性  

Determination of Cold-Resistance for 7 Flat-European Hazel Cultivars Through Electrical Permeation Rate Combining Logistic Equation

作　　者：梁锁兴[1] 席海源[1] 王文平[1] 侯东梅[1] 孟庆仙[1] 张明丽[1] 

机构地区：[1]山西省农业科学院果树研究所,山西太谷030815

出　　处：《农学学报》2017年第4期34-38,共5页Journal of Agriculture

基　　金：山西省科技攻关项目"榛子引种驯化培育技术研究"(2007031070-1);山西省科技攻关项目"抗寒;丰产榛子新品种选育及配套栽培技术研究"(20100311021);山西省科技攻关项目"抗春旱;早果平欧榛品种选育"(20130311022-5);山西省科技攻关项目"雄花优;抗抽条平欧杂种榛新品种选育"(201603D221015-4)

摘　　要：低温冻害是影响平欧榛生长发育的最主要因素之一。为研究不同平欧杂种榛品种(系)之间抗寒性的差异性,采用人为低温胁迫诱导,对平欧杂种榛不同品种(系)休眠期成熟一年生枝进行电解质渗出率的测定,配合logistic方程进行变化曲线拟合,以计算各品种(系)低温半致死温度(LT50),鉴定7个平欧杂种榛品种(系)的抗寒性,并与田间露地越冬试验进行比较分析。结果表明,随着温度的下降,平欧杂种榛各试验品种(系)电解质渗出率逐渐增大,曲线变化趋势基本一致,但增幅有所不同,各品种曲线拐点温度(低温半致死温度)分别为‘06-21’(品系)-19.224℃、‘达维’-18.942℃、‘82-11’(品系)-16.630℃、‘金铃’-16.246℃、‘辽榛3号’-16.139℃、‘魁香’-15.859℃、‘84-572’(品系)-15.248℃。综上分析说明7个平欧杂种榛品种(系)的抗寒性由强至弱顺序为‘06-21’>‘达维’>‘82-11’>‘金铃’>‘辽榛3号’>‘魁香’>‘84-572’,与田间试验基本吻合,说明平欧杂种榛半致死温度可作为抗寒性鉴定评价的一个重要指标。Freezing injury is one of the main factors influencing the growth and development for European hazel. To study the cold-resistance for different European hazel cuhivars, artificial low temperature stress was used, and the electrical permeation rates of mature one-year-old shoots of 7 fiat-European hazel cuhivars were determined during the dormant period. Then combining logistic equation and curve-fitting, semi-lethal low temperature （LTso） and cold-resistance of the 7 cuhivars were calculated and appraised, which were compared with the results of field over-wintering test. Results showed that with the fall of temperature, the electrical permeation rate of the 7 cuhivars increased, and the changing curves were almost the same. Yet the increasing extent was different. The semi-lethal low temperature （LTso） was -19.224℃ for ＇06-21＇, -18.942℃ for ＇Davey＇,- 16.630~12 for ＇82- 11＇,- 16.246℃ for ＇Jinling＇,- 16.139% for ＇Liaozhen 3＇,- 15.859℃ for ＇ Kuixiang＇ and -15.248℃ for ＇84-572＇, respectively, which showed that the order of cold-resistance of ＇06- 21＇ 〉 ＇ Davey＇ 〉 ＇ 82- 11＇ 〉 ＇Jinling＇ 〉 ＇Liaozhen 3＇ 〉 ＇ Kuixiang＇ 〉 ＇ 84- 572＇. This result was almost the same as that of the field test, which indicated that the semi-lethal low temperature （LT50） could be used as an important index for evaluating cold-resistance of flat-European hazel cultivars.

关 键 词：平欧杂种榛 电解质渗出率 半致死温度 抗寒性 

分 类 号：S664.4[农业科学—果树学]