影响桉树插穗生根的几个因素研究

通过6年的桉树扦插育苗研究，总结出影响插穗生根有6个因素：（1）母株来源，组培苗作母株的插穗比扦插苗作母株的生根状况好；（2）母株年龄，母株在1-3年生时采穗条扦插生根率高；（3）穗龄，桉树穗条上长有3-4对成熟叶时扦插成活率高；（4）穗条留叶面积，在扦插不良季节，桉树扦穗留叶至1/3面积的生根率最高，而地扦插良好季节，桉树插穗留叶至2/3面积生根率最高；（5）扦插季节，桉树扦插最佳季节为每年的11月份至次年的4月份；（6）植物生长调节剂，吲哚丁酸（IBA）作生根激素使用效果比萘乙酸（NAA）好。

STUDY ON THE FACTORS AFFECTING ROOTING IN CUTTING PROPAGATION OF EUCALYPTUS

For six years study on the cutting propagation of eucalyptus, we summed up the factors that affected eucalyptus rooting ability. The factors include: (1) The source of mother plants. It is better to using tissue culture plantlets as mother plants than using cutting plantlets. (2) The age of mother plants. The cutting have high rooting rate when mother plants are between 1 to 3 years old. (3) The age of cuttings. Cuttings with 3 to 4 pairs leaves can take more roots. (4) Reserve area of leaves on cuttings. In seasons favoring cutting propagation, leaves of cutting cut by 2/3 are better for rooting, but in seasons disadvantaging to cutting propagation, leaves of cutting cut by 1/2 are better in rooting. (5) Operation seasons. The suitable seasons for eucalyptus cuttage are from November to the next April. (6) Plant growth regulators. It is better to using IBA as plant growth regulator than using NAA in cutting propagation of eucalyptus.