思茅松针叶束水培生根的研究

以思茅松不同年龄母树的针叶束为繁殖材料,通过不同预处理、激素处理及不同水培营养液的3因素4水平正交试验,研究不同处理对思茅松针叶束水培生根的影响.结果表明,影响2年生3、年生母树针叶束水培生根率的主导因素是营养液,影响4年生母树针叶束水培生根率的主导因素是预处理;思茅松针叶束的生根率、生根速度具有随着母树年龄的增加而下降的趋势;本试验中以3年生母树针叶束的生根率最高,最佳营养液是9号液(75mg/kgH3BO4,20mg/kgNH4NO3,20mg/kg维生素B1)

Rooting Experiment with Needle Aquiculture of Pinus kesiya var. langbianensis

An orthogonal test with 3 factors in 4 treatment levels was carried out to study the influence of different factors including pretreatment, plant growth regulator and culture medium on the rooting from varied-aged needle-leaved bundles of Pinus kesiya var.langbianensis.It was indicated that the leading factor affecting the rooting rate of 2 or 3-year-old needle-leaved bundles was the culture medium, and the major influencing factor upon the rooting rate of 4-year-old needle-leaved bundles was pretreatment. It was also showed by the test results that both of the rooting rate and rooting speed dropped along with the increment of ages of the needle-leaved bundles. It was proven by the test that the highest rooting rate was obtained by 3-year-old needle-leaved bundles cultured by No. 9 medium with 75 mg/kg of H_3BO_4,20 mg/kg of NH_4NO_3 and 20 mg/kg of vitamin B_1.