四倍体刺槐扦插繁殖技术  

Reproduction Techniques for Tetraploid Robinia pseudoacacia Cuttings

作　　者：王小玲[1] 高柱[1] 赵忠[2] 张博勇[2] 

机构地区：[1]江西省科学院生物资源研究所,南昌330029 [2]西部环境与生态教育部重点实验室(西北农林科技大学)

出　　处：《东北林业大学学报》2012年第10期7-11,共5页Journal of Northeast Forestry University

基　　金：国家自然科学基金项目(30972352);江西省科学院省级重点实验室开放基金资助

摘　　要：从3 a四倍体刺槐嫁接采穗圃中剪取1 a硬枝和当年生半木质化嫩枝为材料,研究了外源激素种类、质量浓度和处理时间对插穗生根的影响,以及基质积温对硬枝插穗和扦插时间对嫩枝插穗生根的影响;并研究了采穗圃母株年龄为1、3和5 a时分别对四倍体刺槐硬枝和嫩枝插穗生根的影响。结果表明:硬枝扦插以IBA1 000mg.L-1处理6 h为宜,最高生根率和平均生根量分别达55.56%和11.74条;硬枝插穗不定根发生的最低基质积温为121.32℃;当基质积温升高98.26℃时,生根率可提高13.17%,平均生根量可增加1.48条。嫩枝插穗生根率高于硬枝插穗,且嫩枝插穗以IBA1 400 mg.L-1处理4 h为宜,最高生根率和平均生根量分别达77.63%和8.70条。随着母树树龄的增加,四倍体刺槐硬枝和嫩枝扦插生根能力下降。嫩枝扦插随着扦插时间的推迟,生根能力也下降。Annual branch （ hardwood and softwood cuttings） in 1-, 3-, 5-year-old parental plants of tetraploid Robinia pseud- oacacia were used as experimental materials. Effects of the exogenous hormones （ type, concentration and soaking time） on rooting, the effective accumulated temperature on rooting of hardwood cuttings, and the planting time on rooting of softwood cuttings were systematically studied with the 3-year-old parental plants. Then, the effect of parental plant （ 1 -, 3-, 5-year- old cutting orchard） on rooting was studied. Result showed that hardwood cuttings pre-treated with 1 000 mg · L-1 IBA so- lution for 6 hours produced the best rooting rate （55.56%） and number of roots （11.74）. The lowest effective accumula- ted temperature was 121.32 degrees C for root initiation of hardwood cuttings. Rooting rate and number of roots improved by up to 13.17% and 1.48 when the effective accumulated temperature was 98.26 degrees C. The rooting rate of softwood cuttings on tetraploid R. pseudoacacia was higher than that of hardwood cuttings. The highest rooting percentage and num- ber of roots were 77.63% and 8.70 for softwood cuttings treated with 1400 mg · L-1 IBA solution for 4 hours. Rooting ability of hardwood and softwood cuttings decreased with the age of parental plant, and that of softwood cuttings also decreased with the delayed planting time.

关 键 词：四倍体刺槐 外源激素 硬枝插穗 嫩枝插穗 生根率 

分 类 号：S722.81[农业科学—林木遗传育种]