The method of grafting chestnut can improve the variety, increase the yield and advance the result. To improve the survival rate of chestnut grafting, attention should be paid to the following issues during grafting.
First, choose a strong resistance varieties for rootstock real life Anvil, cone chestnut, chestnut, wild chestnut, paralysis, etc. can be grafted chestnut rootstock, but according to my many years of practice shows that use of chestnut for rootstock grafting After the growth is strong, able to withstand drought and barren, early results and high yield, strong chestnut stocks as a strong growth, the effect is also very good.
Second, early acquisition of scion scion early harvest scion should be placed in the slightly moist sand kept in the shade, keep the scion fresh, in order to avoid stems dry or high-temperature germination, chestnut grafting since the rootstock before and after germination to young leaves have been exhibited In the case of 2-3 tablets, if the scion is collected temporarily, the scion has started to germinate. On the one hand, it is easy to damage the sprouts and it is not conducive to operation. On the other hand, the survival rate of the grafted cions after grafting is low.
Third, the selection of the best grafting period of chestnut grafting is not the same throughout the region, the branch is generally in the spring when the rootstock begins to sprout, the bark easy to peel when carried out, the spring of April, mid-autumn chestnut grafting the most suitable period, grafting It is best to be carried out on a sunny day. The optimum temperature is generally 15-25°C.
Fourth, select the appropriate method of grafting autumn bud survival rate is generally poor, rarely used, spring grafting can generally be used to insert skin tongue, cut, peeled then. The rootstock diameter of 1-2 cm is generally cut; the skinning is usually used for high grafting; the large anvil with a diameter of 2-6 cm uses the skinning tongue grafting method, and the survival rate can reach 95% or more. Plug the tongue and then cut the rootstock, flatten it, and then cut the spikes to a 5-10 cm matte-shaped smooth noodles, and then select the smooth side of the stock, gently cut off the skin to expose the tender skin, the length and breadth of the noodles should be compared The scion noodles are slightly larger. After pinching the rootstock, the skin on the back of the scion noodles is pulled open. The xylem is gently inserted into the skin of the rootstock. The skin of the scion covers the tender skin outside the rootstock, which is bound. Then set of plastic tubes moisturizes.
5. After grafting, attention should be paid to the timely removal of sprouts, bagging and topping of rootstocks. After the grafting, it is easy to produce many germinating strips that need to be wiped off in time to promote the rapid growth of the buds. When the buds are long enough to withstand the waterproof bagging, the bags should be promptly removed. Bagging too early may cause the scion to dry out, but later on the buds bend to affect normal growth. When the new shoot grows to about 50 cm, it will be picked up.
6. Li-supporting columns and loosening dressings are to avoid losses caused by humans, animals, winds, etc. When the new shoots reach 30-40 cm in length, they should be erected to support pillars to remove the dressings before the rainy season to prevent waterlogging of the joints. .
VII. Pay attention to pest control Spring buds and young shoots sprouted in spring are vulnerable to harm by weevil and chafer, which seriously affect growth. Some new sprouts are even eaten, seriously affecting the survival rate of grafting. Sex inspection, timely prevention and treatment.
The grafted shoots were transplanted with 35 cm spacing and 8 cm spacing. The cover soil should be shallow so that the buds of the scion are exposed on the ground. Drenched water, take a 50 cm high plastic film low shed, shelf temperature to maintain 20 ~ 30 °C.
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