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四倍体刺槐是我国于1995年从韩国山林厅林业育种研究所引进的刺槐新品种。其特性比普通刺槐有更强的适应性、耐干旱瘠薄、耐烟尘和耐盐碱力,生长快,是水土保持、防风固沙、退耕还林的优良品种,从部分地区引种的实际情况看,是荒山造林的先锋树种。其育苗要点如下:1、根插繁殖春季选取0.5-2cm 的根,截成15-20cm 长的小段,插入苗床,用塑料薄膜覆盖,以提高发芽率。2、扦插育苗秋冬季采条沙藏,选取1cm 以上的1年生萌条的中下部,剪成长25cm 的插穗,剪口剪在芽的附近,并做到剪口平滑。翌春,对少数没有形成愈伤组织的种条,可用浓度为2000ppm 的萘乙酸溶液浸条5-10分钟,插入沙中并覆塑料薄膜增温催根,大约15天左右可形成愈伤组织。3、嫁接繁殖早春砧木未发芽前可用劈接或靠接法;砧木已开始发芽的(但要接穗不能萌动)可用袋接法;8月下旬-9月上旬可用芽接。4、苗圃地在雨季要及时排水,以免圃地积水受涝,此外,8月下旬以后一般不再灌水施肥.以防苗木陡长。
Tetraploid Robinia pseudoacacia is a new species of Robinia pseudoacacia introduced in 1995 by Forestry Research Institute of Korea. Its characteristics than ordinary Robinia has more adaptability, tolerance to drought infertility, resistance to dust and salt tolerance, fast growth, is the soil and water conservation, wind and sand, fine varieties of returning farmland to forest, from the actual situation in some parts of the introduction, Is the pioneer tree afforested barren hills. The nursery highlights are as follows: 1, root breeding propagation Select the roots of 0.5-2cm, cut into small segments of 15-20cm long, inserted seedbed, covered with plastic film to increase germination rate. 2, cuttings seedlings autumn and winter mining streak sand, select more than 1cm in the lower part of the 1-year-old sprouts, cut 25cm cuttings cut, cut in the bud near the cut, and to make the cut smooth. The next spring, for a few did not form callus seed, the concentration of 2000ppm naphthalene acetic acid solution soaking 5-10min, insert the sand and plastic wrap plastic film warming up, about 15 days to form callus . 3, grafting Early spring stocking can not be used before the splitting or docking method; rootstock has begun to germinate (but to spike can not sprout) available bag connection method; late August - early September available budding. 4, Nursery to timely drainage in the rainy season, in order to avoid waterlogging poo in addition, in late August after the general irrigation is no longer fertilize.