摘要
报道了龙眼双芽扦插育苗的研究进展：１．采用双芽插条生根率和生长情况与多芽长插条相同，可较大限度地节省枝条。２．插条的适宜木质素含量是１７．７３％～１９．０４％，外观颜色为浅绿色、深绿色和浅褐色。３．用自行研制的ＫＧ－１型环状剥皮刀对选用的枝条进行环割（宽度为２ｃｍ）．约１５ｄ后，伤口愈合并长有白色愈伤组织时，每个枝条保留２个叶片即可离体扦插。４．扦插前枝条必须浸在１５０ｍｇ／ｋｇ吲哚丁酸溶液５ｍｉｎ。５．扦插基质以７０％泥炭土加３０％蛭石粉的混合基质为宜。扦插后置于间歇性弥雾的玻璃温室中，保持气温２０～２７℃、相对湿度８５％以上。６０ｄ后开始长根，生根率可达７１．８％，６～７个月后，每株苗留４～５个叶片移栽于营养袋，并置于间歇性弥雾的温室中６～８ｄ后开始长新根，成苗率可达８５％以上，已成活的３６０株双芽扦插苗两年后的平均高度为８０ｃｍ，最高达１５０ｃｍ，比嫁接育苗可提早１年左右出圃。
This study makes known that the progress of raising seedlings of Lonyan by cut-tings. 1. By using the Two-Bud-cutting, the root-growing rate and the growth condition are nearly as same as that of long cutting with several buds and a lot of cuttings being saved. 2. The suitable xyloid content in the cutting is 17. 73%to 19.04%and the colour of the cutting is light-green,dark-green or light-brown,accordingly.3.The Two-Bud-Cutting with a width of 2 cm should be done by KG-1 type cycle-peeling knife made by us. When the wound heals up and produces the white callus(about 15 days after peeling off),the cutting can be cut from the mother tree to raise seedling and two green leaves should be remained on each cutting.4.The cutting base should besoaked in 150 mg/kg IBA for about 5 minutes before cultivated.5. The suitable substrate for rais- ing cuttings are made of 70%peat soil and 30%vermiculite powder.The seedling bed should be in the green house with the treatment of fine spray. The air temperature should be kept between 20～27 ℃ and the relative humidity should be above 85%.According to the method as mentioned above,the cutting begins to grow roots after 60days and the seedling survival rate reaches 85%to 90%.The period of raising seedlings by this way can be about one year shorter than that by graftage.
关键词
龙眼
双芽扦插
育苗
Lonyan
Two-Bud-cutting:Raising seedling
