Poplar is the main afforestation species in afforestation and returning farmland to forest in Xinjiang and even in the entire northwest region. It has been using traditional spring planting and afforestation for a long time. Because of the short spring planting time, shortage of water resources, low temperature and drought, and other factors, it restricts large-scale afforestation and its progress, and the survival rate is relatively low. However, modern intelligent greenhouse planting seedlings can fundamentally solve this problem. . It has a short incubation time (60d, height of up to 20cm), complete seedling root system, no soil damage caused by transplanting with soil transplant, high survival rate of afforestation, high yield per unit area, and not limited by afforestation season. As long as you have a good grasp of nursery time, from May to July can be afforestation, when the high growth of seedlings can reach more than 2.5m. It not only greatly prolonged the afforestation time, increased the survival rate of afforestation, but also achieved the year of planting seedlings in the year, opening up a new road for future afforestation of large areas. The Center completed and put into use the WGK-80 intelligent greenhouse in 2002. As of June 2003, it has accumulated 1 million seedlings, assisted in the complete development of 666.7 hm2 of afforestation in the summer and accumulated some nursery experience. Several technical issues in nursery work are summarized below. 1 Selection and Placement of Nutrition Fries Through our two years of production practice, the use of 8cm12cm (upper mouth width and height) plastic nutrient pods is better, with 220 or so per square meter can be placed, the survival rate is more than 90%, than the use of other The seedling survival rate can increase by 30% and the yield per unit area is higher. According to actual investigations, the larger size of the nutrition bowl causes waste, while the smaller one is not conducive to the growth of the seedlings. 2 The choice of nutrient soil and preparation of nutrient soil is the key to fast-growing and high-yield seedlings. In order to ensure that the nutrient soil is loose and transparent, the proportion of garden soil is 60% (screening), sawdust 20%, and decomposed sheep manure 20% ( Sieving) is ideal. In order to reduce the damage of weeds and pests, garden soil and sheep excrement should be piled up in the previous year, fully exposed to high temperatures and used after decomposed. 3 Selection and interception of cuttings Due to the particularity of the nutrition seedlings, the mature seedlings with full lignification in one year should be selected as seedlings, and seedlings with roots of 1 year in 2 years or 2 years in roots in 2 years should not be used as seedlings. Article usage. The species shall be placed in an open-pit burying kiln flat before wintering before the winter and the larvae shall be removed after the spring of thawing in the second year. The cutting length of the cuttings shall be 10 cm. The strips removed the roots and shoots with a high survival rate of 1.5-2 cm in the upper and middle thicknesses. 4 The cutting method can be bagged with deep nutrient soil. The soil must be filled with flat mouths, and it must not be pressed by hand to maintain a natural and loose state. Before the insertion, the water is sprayed on the container until the soil is fully saturated, and the cutting depth is 7-8 cm. Too deep causes rot in the lower part of the cuttings and the cuttings are too dry. Cuttings were treated with rooting powder before cutting, and no rooting powder was also soaked in fresh water at about 15°C. First, the cuttings are tied into the roots and soaked down to a depth of 5-6 cm. After the buds have grown, the roots can be swelled and the cuttings soaked for 1-2 days. The water is changed once a day. 5 Daily management after cutting The intelligent greenhouse's temperature, humidity, and light are all automatically controlled. In order to ensure the normal growth of seedlings, the early temperature is set at 25°C, the latter is set at 32°C, and the humidity is always maintained at 80%. The shade screen should be kept in shade before the seedlings take root. After the seedlings are rooted, the seedlings are gradually opened. Nutrient cutting seedlings are different from field seedlings. Containers cannot be loosened and soil can only be kept wet by sprinkler irrigation. The number and duration of sprinkler irrigation should be determined according to weather conditions and soil moisture conditions. Within two weeks after cutting, water sprays should be performed sooner or later. After the roots develop steadily, the amount of water sprayed can be appropriately reduced to increase soil temperature and promote seedling growth. During the whole growth period, spray water was sprayed on a 1% potassium dihydrogen phosphate solution using a fertilizer application to perform foliar dressing and promote seedling growth. 6 When the seedlings reach the certain height after they reach a certain height (generally 20cm, cultivation time 45d), the big seedlings should be moved out of the outdoor hardening seedlings to adapt to the natural environment. After the small seedlings are sorted out and continue to be cultivated, the remaining seedlings can reach the standard. All out of the garden. Intelligent greenhouse poplar nutrition cutting seedlings, there is a big difference with the conventional nursery, should be strictly in accordance with the requirements of scientific procedures, strict quality control, give full play to intelligent greenhouse modernization potential, to ensure the survival rate of seedlings and growth, to achieve high yield . China Agricultural Network Editor