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。
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.