The method of raising Poplar seedlings in Summer

Before planting, we are prepared to select varieties with fast growth, high quality and high yield and strong adaptability, such as 80351, 72 poplar, 69 poplar and so on. From the end of July to the end of September, the cuttings began to breed when the cuttings were semi-lignified. Mass propagation is mainly based on the twigs and weak shoots of the same year's seedlings in the nursery. The width of the bed is 1 meter, the length is based on the number of cuttings, and the height is 20 centimeters. The matrix is composed of river sand, fine cinder, etc., accounting for 70%, soil accounts for 300%, and soil fungicides are evenly mixed and set aside. Pruning of ear strips usually starts at 16:00 in the afternoon, especially on rainy and cloudy days. Adopt the method of picking cuttings, cutting ears and cutting at the same time. The cuttings take 3 leaves as the ear, each branch is cut 3-4 segments, do not want the tender branches, the upper and lower cutting mouth is 2cm away from the stalk base, the upper and lower leaves are slightly oblique, the upper leaves are cut in half, and the lower two leaves are cut off. After cutting, the panicle strips were inserted into the border bed according to the row spacing of 20 cm × 10 cm, reaching the base of the upper leaf. After inserting the management after inserting the ear strips, immediately pour enough water, shade for 10-12 days, spray water frequently during the day, naturally exposed in rainy days. Spray 25% carbendazim 250 times 3-5 days after insertion. Take root and sprout at 8-10 days after cutting. after that, the times of spraying water should be reduced, and the light should be increased gradually in the morning and evening until the mulch is removed. The decrease of moisture and light should be based on the non-wilting of young shoots. When the new shoots of seedling management were about 5 cm long, the artificial fertilizer was mainly mature liquid fertilizer, the ratio of water to fertilizer was 1 ∶ 12, and then applied once every 7 to 10 days, the ratio of water and fertilizer gradually increased to 1 ∶ 8. During the period, foliar fertilizer was sprayed for 2 times and 0.2% urea solution was sprayed or. 0.1% potassium dihydrogen phosphate solution. And pay attention to drought prevention, sunburn at noon, spray 25% carbendazim 250 times liquid every 10 days. As long as the water and fertilizer are well managed, the early seedlings can grow to about 1.5 cm.