Before and after collecting the seed frost, when the beginning of the fruit is brass or brown, the seeds are harvested. During this period, the seed oil content is the highest. The collected tung fruit should be piled in the damp and damp place, covered with straw, and be peeled off immediately after the skin is softened and matured. Excavate the seeds and solve them with a little solution; if spring sowing, the seeds must be dried and mixed with sand; during storage, they should be inspected regularly and water should be added in a timely manner to prevent moldy deterioration.
Afforestation techniques Tung tree seeds have large grain size, high germination rate, fast growth, and more live afforestation, and can also be planted by afforestation; live afforestation, winter sowing in December - January; spring sowing usually in late February to early March; More sowing in the spring; the method is: in the entire good afforestation ground, according to the spacing of 5050 cm, dig a 30 cm hole, cave base pad base fertilizer, sowing seeds 2-3 per hole; cover soil 5-7 cm, cover A layer of hay to prevent top soil consolidation; May and June seedling height 10 cm seedlings, leaving 1 seedling per hole.
Planting and afforestation can be carried out in the spring and late fall and early winter. When the seedlings sprout in early April but the leaves have not yet been planted, the survival rate is the highest. When planting, the top buds are full, the height is 90-120 cm, and the diameter is 1.5-2.5 cm. Seedlings; their roots were soaked in 0.5% polymer water absorbent solution or 500ppm ABT3 rooting powder solution, and thereafter planted at a height of 11 meters and a depth of 0.8 meters.
Within 1-3 years after tending and afforestation, every year tillage, weeding, application of two fertilizers, and pruning to cultivate "table lamp-shaped" harvest tree; tung tree annual seedlings often suffer freezing injury, to do a good job of cold protection; in seedling growth In the cultivation stage, in addition to applying the base fertilizer, weeding and weeding should be done in time from May to September, and no quick-effect fertilizer should be applied. In the autumn, stagnant watering should be done to prevent new shooters. For the annual seedlings, the wintering water can be filled before and after the “Little Snowâ€. Root and neck soil 30-40 cm, with the backbone of the hay bandage, after the frost in late March the following year to release the tied objects, open the mound; for the 2-year-old seedlings, only in the root and neck around the mound can; for the results tree, White antifreeze can be applied.
Prevention and control of pests mainly include bituminous coal disease, Ulmus ulmoides, and six-spotted leafhoppers. The prevention and control method for the tung oil bituminous disease is: timely prevention and control of aphids and scale insects. When such pests are found, 40% Leko emulsion 1000-2000 times solution or 50% dichlorvos EC 500-1000 times can be used to spray; control bituminous coal Phosphor can be used for stone disease, and it can be used in summer with Baume 0.3, winter with 3 degrees, spring and autumn with 1 degree lime sulfur spray, both the role of insecticidal treatment; the chemical control of the tung tree ulnar is, before the 4th instar With 20% speed kill Ding 4000-6000 times liquid, or 90% of trichlorfon 800-1000 times spray.
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