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1, choose a good variety. The key to the benefit of raising seedlings is to select good new fast-growing varieties. At present, the popular varieties that have performed well in our country include Zhongwei No. 1, Tianyan Yang, Europe and the United States Yang 107, 108 and so on.
2, choose a good nursery. The key to the success of breeding is to choose a good nursery, and the nursery should select a place with flat terrain, good irrigation and drainage conditions, loose soil, and convenient transportation. Before winter, deep-frozen 25-30 cm frozen mulberry, Mushi basal fertilizer 3000 kg, ç¿ŒDo it again in the spring.
3, mining and cuttings. This is the basis for determining the growth of seedlings. One-year-old seedlings should be selected, no pests and diseases, and vigorously growing shoots for cuttings. Cutting diameter 1-2.5 cm, length 15 to 18 cm, with 3-5 robust buds as well. Manual cutting to select sharp kitchen knife, the upper incision is flush, the lower incision into a horseshoe shape, to avoid incision chapped. Cut the cuttings immediately, so as to avoid losing the moisture and reducing the survival rate.
4, cutting. Poplar cuttings can be grown in spring and autumn. However, early in the spring, it is advisable to cut the line at a distance of 60 cm. The cuttings are at a 45-degree angle to the ground, exposing 1-2 buds, cutting 4 plants per metre, cutting 4800 plants per 667 square meters, and avoid inserting the cuttings. Cuttings of different thicknesses were cut separately to achieve uniform growth.
5, fertilizer and water management. It is a guarantee for the growth of seedlings. Immediately after the cutting, the first water was poured using a small-water flooding method. After the watering once a week, until the mid-May seedlings in the middle of the seedlings combined with top dressing and then irrigation. After every ten days and a half months, look for water again. In June and July, fertilizers are usually topped twice. Watering is about 10 times a year. At the beginning of September, the last water was poured and the irrigation was stopped to promote the lignification of the seedlings and to prevent the seedlings from being leggy so as to facilitate wintering.
6, weeds pick buds. Loose soil weeding can be done after the seedlings are settled. Generally weeding soil can be 2-3 times. Poplar can produce lateral branches in almost every leaflet. Therefore, the young shoots should be removed promptly. During the whole growth period, at least 3 times of buds were picked. For the first time in the middle or late May, in principle, only one strong seedling should remain in the double-row or more. The second time, at the end of June, all the germinating side branches were erased. The third time is in the middle of July.
7, control of pests and diseases. When planting before nursery, use 50% methyl ethyl thione granules 1.5 to 2 kg of fine soil to prevent underground pests. Before transplanting seedlings, the roots were soaked with 50% carbendazim and 15% thiophanate-methyl in a ratio of 1:1 to 200-250 times for 1 to 2 hours to effectively control root rot and black spot. During the growth period, in early July and early August, 50% phoxim 1500-fold solution and carbendazim 500-fold solution were used to prevent poisonous moth and other pests, such as brown spot disease.
Rapid Poplar Nursery
Poplar is a kind of fast-growing and high-yielding tree species. It has the characteristics of easy planting, high survival rate, fast growth, and smooth marketing, and is the first popular tree species for the construction of fast-growing and high-yield forest, farmland shelter forest network, construction of green corridors, and greening on all sides. Fengtai Guqiao Science and Technology Demonstration Park has introduced the new varieties of fast-growing Yang Tian Ye Yang and Zhong Vung 11 in the past two years. It was cut and managed meticulously. The survival rate was over 95%. The six-month seedlings were as high as 5 meters and 4800 strains per mu. The annual output of nursery is nearly ten thousand yuan. Its seedling technical experience is: