After many years of growth and harvesting, the mulberry tree has lost its tree vigor, its character has been degraded, its disease resistance has decreased, and its yield has been low. At this time, it is possible to improve the variety and renew the old tree by changing the roots. This grafting method is easy to operate and has a high survival rate of grafting. Mulberry trees are put into production soon after changing the seed, which has little effect on the yield.
First, the treatment of scion is generally from late March to early April, select high mulberry varieties with high leaf yield, good leaf quality, and strong disease resistance, such as 71-1. Twenty days before grafting, cut one year old robust, disease-free mulberry branches and store them in a cool place. Before grafting, scion 15-20 centimeters long. The upper part of the scion cut 0.7-1 centimeters above the bud. Lightly cut a knife just below the bud. It is about 1 centimeter long. The deep skin coat forms a small bevel. Cut the mouth; on the back of the first knife and re-cut a knife, length 4-5 cm, cut l / 3 around the xylem, forming a large beveled cut mouth.
Second, grafting and digging need to change the roots of the old mulberry soil, in the smooth root near the upper part of the trunk with a knife cut "eight"-shaped incision, deep to the xylem and split the skin with a bamboo slice, will cut a small oblique slant inward. With the large incline facing outwards, obliquely insert the "∧" shaped incisions of the mulberry tree, sew tightly with wet soil, press around the real interface, and cover the top of the scion with warm soil. Be careful to keep the cut noodles clean during operation. More than two heads can be grafted on the tree as needed.
Third, after management, when the weather is dry, after grafting, the grafted parts can be covered with wet grass after grafting. After the scions germinate, pick the buds according to the soil conditions. After the new shoot grows, take care to prevent wind blows or artificial damage. After the new bar has grown into the original trunk, saw the original trunk, and strengthen the management of fertilizer and water, to promote the growth of new technologies. The leap year is cut according to the requirements of the tree.
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