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金叶国槐插皮枝接嫁接方法

作者: 雪松价格 浏览次数: 时间:2018-12-03 16:27
  1 金叶国槐品种介绍
  金叶国槐(sophora japonica cv.jinye)为落叶乔木,蝶形花科槐属,系国槐变种,金叶国槐具有叶片金黄鲜艳,叶色从春季萌芽直到秋季落叶前始终保持金黄色叶片,娇艳醒目,树冠丰满,枝条下垂,极具观赏效果,且观赏期长,萌芽力强,耐修剪,适应范围广等特点,从3~7月,金叶国槐叶色亮丽,甚至到9月底,金叶国槐二次抽梢,新生叶色依然亮丽,远远优于其它黄叶树种,是园林绿化中“红、黄、绿”三个主色调可以广泛地应用于城市园林、绿色通道等工程。
  2 插皮枝接嫁接方法
  将砧木锯断,剪口毛茬削平,挑选保存良好的接穗,把基部削成马耳形斜面,削面要平滑,长5cm以上,厚度要小于穗粗的1/2,然后再从削面背面两侧各轻削一刀,使其成箭头状;用刀将砧木皮层撬开,将接穗大削面向木质部,垂直插入接口,深度以接穗削面在砧木切口上微露为宜,最后用透明塑料袋从上罩下,用厚 0.08mm的高弹塑料薄膜从下至上绑紧。
  3 嫁接时期的确定
  不同的嫁接时期成活率及新梢生长效果差别很大,导致不同时期嫁接成活率、接穗新梢生长粗度、长度不同的原因是多方面的,主要原因是不同嫁接时期的温湿度不同,而且砧木的发育程度不同,4月5日~4月20日是国槐砧木展叶盛期和春梢旺盛生长期,细胞分裂最活跃,嫁接后伤口愈合快,成活率高,接芽萌发后生长旺盛,是金叶国槐嫁接的最佳时期。
  4 后期管理
  嫁接当年的金叶国槐在生长到一定高度后,容易被风刮折,要及时修剪砧木疯长单枝。在生长过程中,若出现生长不良的现象,要通过修剪多余枝条来平衡树势。树体的造型修剪主要使龙爪槐的枝条弯曲下垂,树冠修剪成伞状,金叶国槐的枝条向上生长形成树冠,这样整株树上部枝条金黄,下部枝条翠绿且下垂,远观似蘑菇造型。嫁接成活后适时进行接穗放风锻炼,及时抹去砧木上的萌芽。
  在整株树具有一定的枝叶量后,亦可根据树体造型的需要以及人们不同的欣赏角度,因势作形,做出各种形状的树体,如龙头、龙身、龙爪或凤凰的形状,这种造型在园林绿化上比较罕见,用作行道树,别具一格,标新立异,可大大提高观赏价值。
  1 Introduction of Varieties of Sophora japonica
  Sophora japonica cv. Jinye is a deciduous tree. Sophora japonica cv. Jinye is a variant of Sophora japonica. The leaves of Sophora japonica are golden and bright. The leaves of Sophora japonica keep golden yellow from sprouting in spring to falling in autumn. The crown is full and the branches are drooping. It has a very ornamental effect. The ornamental period is long and the budding period is long. From March to July, the leaves of Sophora japonica were bright, and even at the end of September, the new leaves of Sophora japonica were still bright, which was far superior to other yellow-leaved trees. It was the three main hues of "red, yellow and green" in landscape greening and could be widely used in urban gardens and green passages. Other projects.
  2. Grafting method of cuttings
  Saw the rootstock, cut the stubble flat, select the well-preserved scions, cut the base into a Maltese inclined plane, cut the surface smoothly, more than 5 cm long, less than 1/2 of the ear thickness, and then slice one knife from each side of the back of the cutting surface to make it arrow-shaped; pry the rootstock bark with a knife, and cut the scions to the xylem, and droop them. Direct insertion of the interface, the depth of scion cutting surface in the rootstock incision is appropriate, and finally with transparent plastic bags from the top, with 0.08mm thick elastic plastic film from bottom to top.
  3. Determination of Grafting Period
  The survival rate and growth effect of new shoots vary greatly in different grafting stages. There are many reasons leading to different survival rate, thickness and length of new shoots. The main reason is that the temperature and humidity of different grafting stages are different, and the development degree of Rootstocks is different. From April 5 to April 20, the development of leaves of Sophora japonica rootstocks is different. In the peak and vigorous growth period of spring shoots, cell division is the most active, wound healing is fast after grafting, survival rate is high, and growth is vigorous after germination, which is the best time for the grafting of Sophora japonica.
  4 late management
  Grafted locust trees are easy to be broken by wind when they grow to a certain height. It is necessary to prune rootstocks in time. In the process of growth, if the phenomenon of poor growth occurs, it is necessary to balance the tree potential by pruning excess branches. The shape pruning of the tree mainly makes the branches of Robinia pseudoacacia bend and droop, and the crown is pruned into umbrella shape. The branches of Robinia pseudoacacia grow upward to form a crown, so that the upper branches of the whole tree are golden yellow, the lower branches are green and droopy, and look like mushroom shape from a distance. After the grafting survived, the scions should be ventilated and the germination on rootstocks should be erased in time.
  After the whole tree has a certain amount of branches and leaves, it can also be shaped according to the needs of the tree shape and people's different appreciation angles to make various shapes of the tree, such as the shape of the tap, the Dragon body, the dragon claw or the phoenix. This kind of shape is relatively rare in landscape greening. It is used as a street tree, unique and unique. It can greatly improve the ornamental value.
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