Grafting method of Robinia pseudoacacia

Grafting method of Robinia pseudoacacia

Way of use

Ornamental value: Robinia pseudoacacia is widely used in landscaping, and it is one of the colorful leaf trees in roads, scenic spots and other landscaping. It not only has the ornamental value of the landscape of the four seasons, but also can improve the stability of the population and good landscape effect in mixing with other tree species because of its ecological characteristics. Especially in winter, this kind of golden yellow is thicker, more gorgeous, unique style, quite rich in garden woody flowers, with high ornamental value.

Medical and health value: the fruit of Sophora pseudoacacia can cool blood and stop bleeding, clear liver and purge fire, and can also be used for hematochezia, hemorrhoids, dysentery, metrorrhagia, hematemesis, bleeding, headache and vertigo; it also has a variety of health care functions, such as reducing blood pressure, reducing blood lipid, anti-inflammation, anti-ulcer and so on. Fructus Sophorae is also an excellent raw material for extracting food pigment; at the same time, it is the main raw material of industrial medicine rutin.

Over the years, locust rice sells well, supply exceeds demand, and the planting prospect is quite good. For example, Quanzhou County in Guangxi focuses on golden locust trees as its economic development. statistics show that by 2015, more than 35000 mu of golden locust forest had been planted, and more than 14000 mu had been planted in the spring of 2016. The average output value of golden locust reached 8000 yuan per mu in 2015, and the average benefit per mu was more than 7000 yuan. Golden locust industry has become a new bright spot for farmers' income and county finance and tax growth in this county.

Planting

The method of grafting propagation of Robinia pseudoacacia is generally used as rootstock: sowing Robinia pseudoacacia as rootstock in spring in the first year, leaving 5000-6000 seedlings per mu. When the seedlings of Robinia pseudoacacia grow to 0.5 meters high, grafting of Robinia pseudoacacia is carried out, and the specific standard is determined by the diameter of the scion of Robinia pseudoacacia. It can be grafted in spring, summer and autumn, and the survival rate of grafting in late spring and early spring is the highest, and the survival rate of "T" bud grafting is more than 98%.

With general Robinia pseudoacacia as rootstock, embedded bud grafting or split grafting is used before spring germination. If the grafting technology is skilled, the survival rate can reach about 90%.

Grafting method rootstock selection and grafting method

The rootstock can choose not only one-year-old seedlings with root neck diameter of 0.5 cm, but also perennial seedlings with breast diameter of 3 cm and 5 cm. However, different grafting methods should be adopted for different rootstocks.

The growth rate of Robinia pseudoacacia is faster than that of Robinia pseudoacacia, and it is easy to form the phenomenon of "big head and small feet" in the grafting site. Using perennial seedlings as rootstocks and adopting the method of high branch grafting, the formation is fast and the time to get out of the nursery is short. However, when multiple scions are pieced together in the same section, the opening angle of the branches is small, which is easy to cause the phenomenon of neck pinching, and the binding position is not firm, so it is vulnerable to wind damage. In addition, the shaping, renewal and rejuvenation of this kind of seedling are limited, and the color of the trunk and upper branches are not the same. Using one-year-old seedlings as rootstocks and budding at 10 cm above the root and neck, although the shape is slow, the time to get out of the nursery is long, and there are some shortcomings such as "big head and small feet", but before the trunk epidermis is completely corked, the color of the whole plant is the same and the ornamental is good. And strong wind resistance, plastic surgery, renewal and rejuvenation of the flexibility. If the root neck and the grafting part of the rootstock are buried in the ground together when transplanting, it is not only beautiful, but also does not affect the seedling growth, but also can play the role of seedling fixation. Therefore, in the long run, the method of budding at the base of one-year-old rootstocks has more advantages.

Grafting time the time of grafting of Robinia pseudoacacia mainly considers the following factors:

(1) requirements for seedling specifications and arrangement of production batches

(2) the phenological phase of bud growth of local rootstocks and scions.

(3) avoid disastrous climate

(4) different grafting methods.

Take the middle and lower reaches of the Yellow River as an example, in March or April every year, when the buds are full and are about to sprout but not germinate, annual rootstocks can be used for bottom budding. The scion is used whenever it is picked, and the bud hole with xylem is used for bud grafting. Unused scions should be stored in a cool and ventilated place in time with wet sand for use. From late May to June and July, the sap is exuberant and easy to peel, so it is appropriate to use T-shaped bud grafting, that is, "hot sticky skin" method. After the bud grafting survived in August, due to the short growth period, it can "sprout" overwintering to the following year. Cut off the upper rootstock before bud germination in the second year and carry out normal management and protection. Branch grafting can be carried out from mid-late March to early May, and the key is to harvest and store the scion in advance. However, if the storage time is too long, the vitality of the scion becomes weaker, so the branch grafting should be done sooner rather than later. No matter which method is adopted, the scion branches are required to be robust and free from diseases and insect pests, and the grafting operation should avoid rainy days to prevent Rain Water from infiltrating and affecting survival.

Flos Sophorae

Fructus Sophorae

Interplanting

Chinese herbs and crops such as honeysuckle and peanuts can also be planted under the tree, which can not only rationally use and effectively protect resources, but also bring significant economic benefits to farmers, broaden the channels to increase farmers' income, and quickly help farmers shake off poverty and become rich.