Recently, Yang Yongtao, a reader of Zhanghua Town, Pingyuan County, reported that: This year, he introduced new varieties of willows and prepared to cultivate strong seedlings. He hoped that the newspaper will introduce in detail directional seedling technology of willows. For some, the reporter invited Jiao Chuanli, a willow breeding expert, to write the manuscript, so please refer to the readers for reference.
With the development of science and technology and the strengthening of awareness of improved varieties, new varieties of willow will continue to be introduced. The author believes that good breeding methods are very important, that is, requiring a good breed to have a set of corresponding cultivation methods, so as to reflect the characteristics of improved varieties. Therefore, according to the experience of willow cultivation in the past few years, the author summarizes the directional seedlings with the new willow variety 9901 as an example. The process is discussed with everyone.
First, the cultivation of garden seedlings
1. Cultivation objectives: height 450 cm above, breast diameter 3 to 8 cm.
2. Cultivation Density: In the first year, 120 centimeters and 40 centimeters, 1387 per mu, about 700 at the end of the year, 120 centimeters and 80 centimeters at the second year, and at the end of the year, about 600 canopies of 6 to 8 centimeters in breast diameter can be planted out of the garden.
3. Post-insertion management: 1Covering of soil after water cover: regardless of years or years after cutting, the first water may cause some species to be in cracks (especially clay soil) after being inserted into the ground. The water is dead, so after the watering, it is found that the section of the storm has to be covered with soil in time, but do not loosen the soil. Once the seed is shaken, this section will become a waste product. 2 Stubbles: Because the main buds and buds of willow buds are particularly strong, germination of 2 to 3 strips is normal. When the sprouts grow to 15 to 20 centimeters, a strong reserve is selected and the rest are cut off. During the growth process, the variety does not require pruning and has good natural pruning ability. If the height of seedlings is less than 200 cm, it is found that insect pests have harmed the top of the seedlings. When 2 or 3 tops occur, they must be trimmed in time to retain only one end bud. 3 Topdressing: According to the growth characteristics of the 9901 willow, it is better to top-dress in the late May, mid-June, early July and late July and early August. The first application of 20 kg urea per acre, the second 25 kg urea, the first Three times 35 kg of urea, followed by 40 kg of N, P and K compound fertilizers for the fourth time. In the fertilization can be combined with the weather and watering, generally 4 to 5 days after fertilization watering. 4 Watering: Willows usually require soil moisture, so depending on the weather conditions, the drought will be poured, while the oysters will be ranked. Watering can be combined with fertilization, which is usually done 4 to 5 days after fertilization. 5 Cultivating and weeding: In order to maintain a good growth of seedlings, artificial tilling is performed at appropriate times during the growth of seedlings, and weeding is performed with loose soil to ensure the highest utilization rate of fertilizers and water for seedlings. 6 Pest Control: According to the author's observations, from the middle of April, we must pay attention to the damage of the blue leaf beetle, spraying trichlorfon, pyrethroid drugs can be controlled. 7 In the second year, except for 12 steps, the management of seedlings was the same as the management measures in the first year.
Second, the cultivation of high-quality afforestation seedlings
1, cultivation specifications: height 350 to 400 cm, diameter 2.5 to 3 cm.
2. Planting density: 100 centimeters and 20 centimeters, with 3330 strains per acre. In the current year, more than 3,000 afforestation seedlings with a height above 350 centimeters and a diameter above 2.5 centimeters can be produced.
3. Post-insertion management: In addition to topdressing, other management measures are the same as those for garden seedlings. In late May, mid June, early July and late July and early August, it is better to top-dressing. The first application of 25 kg urea per mu, the second 30 kg urea, the third 40 kg urea, and the fourth recovery Contains N, P, and K each 15 kg of compound fertilizer. In the fertilization can be combined with the weather and watering, generally 4 to 5 days after fertilization watering.
Third, the quality of species cultivation
In order to cultivate the willow species, separate production areas must be established to ensure that the fine varieties do not deteriorate. The author believes that the use of seedlings as a cutting seedlings, do not use lateral branches as cuttings, in order to cultivate a fast growth, dry shape, good quality seedlings, maintain a high quality characteristics.
1. Cultivation objectives: height 350 cm above, DBH 1.5 to 2 cm.
2. Cultivation density: 100 cm 10 cm, 6660 per mu.
3. Post-insertion management: Post-insertion management, with the exception of topdressing, other management measures are the same as for garden seedling cultivation. In late May, mid June, early July and late July and early August, it is better to top-dress the crop. The first time, 30 kg urea is applied per mu, the second 40 kg urea, the third 50 kg urea, and the fourth It contains 50 kg of N, P and K compound fertilizer. In the fertilization can be combined with the weather and watering, generally 4 to 5 days after fertilization watering.
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