The cultivation of chestnut grafted seedlings was earlier than the planting seedlings. The fruiting was early and the quality was good. It was adopted by many farmers in recent years. First, the choice of site preparation in the flat, fertile soil, loose texture, well-drained slightly acidic sandy loam, PH value of 5.5 to 6.5. In the late autumn and early winter, 7 to 80,000 kilograms of farmyard manure is applied per hectare, and deep plowing is carried out. From February to March of the following year, the seedlings are made into a 50 cm wide, 15 cm high, and a 20 cm wide path. The length of the seed bed is subject to actual conditions. Do bed crushing, bed leveling, gutters open. The soil was disinfected with ferrous sulfate or formalin for the first 3 days to 5 days. Second, the seed storage Autumn full collection of mature, full of good chestnut seeds, placed in potassium permanganate solution disinfection and sterilization. It is best to put the seed in the cellar and store it in a layer of chestnuts on a layer of wet sand. 3. Seedlings in the sand in the middle and late March will be sown in one-third to one-half of the germinating time. Two rows of small ditches will be dug first, and a suitable amount of compound fertilizer (600kg/ha) will be evenly spread in the small ditch. ), Cover the fertilizer thinly with fine soil to isolate the fertilizer from the seeds. Then the chestnuts are discharged downward into the ditch at a distance of 6 cm to 8 cm on the soil. The chestnuts are then covered with 2 cm to 3 cm of soil and covered with straw. After sowing, soil loosening, weeding, fertilization and pest control should be strengthened. IV. Grafting In the late August to early September, choose a sunny, sunny graft. 1. Spike collection: A well-grown, leaf-filled, pest-free lignified or semi-lignified shoot was used as the scion on the elite clone tree. Spikes come with scissors. 2, anvil: in the rootstock 4 cm to 6 cm from the ground with a grafting knife by 45 degrees angle oblique under the knife, cut into the xylem about 0.1 cm, and then the first knife in the upper 4 cm obliquely cutting the second knife, and finally The xylem and the cortex between the first knife and the second knife are removed. 3, cutting head: Select fresh, buds full of leaf buds for scion. First cut the cuttings at a 45-degree angle to the side of the bud 2 cm below the bud. Then, with a grafting knife, the cortex and xylem of the cuttings were removed from the top of the shoot from the top to the bottom of the shoot, and cut into the skin about 0.1 cm to expose a width of 0.3 cm to 0.4 cm and a length of 3 cm to 4 cm. . Finally, cut off at the top 2 cm of the shoot, making the cut under the scion wedge-shaped. The length of the cutting is about 4 cm. 4. Scion scion: Align the long cutting surface of the scion with the anvil incision, and make the undercut and the noodles of both sides close. Use a plastic film tape with a width of 1 cm to 1.5 cm and a length of 40 cm to 50 cm. Thread the connection from the bottom to the top, do not cover the buds, and do not injure the bud. Care should be taken to prevent the scion from moving. A 10 cm 10 cm piece of plastic film was used to wrap the interface and form a wet plastic bag. V. After the second year of management, in the next 4 minutes to 6 centimeters from the bud, the anvil will be broken. When the new buds that the scion grows touch the top of the bag, the wet bag will be released in time, and will be released from late March to early April. Banding and removing all sprouts of rootstocks to promote shoot growth, application of urea fertilizer in May, application of compound fertilizer from May to August, and watering during drought. In the third year of spring (February to March) afforestation, the cultivated chestnut grafted plants can be transplanted and transplanted.
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