First, the field chooses the beautiful autumn light, the oxygen demand of the root system is large, afraid of earthworms, intolerance to salt and alkali. When selecting a site, pay attention to the following points: First, choose a site with a higher elevation and a lower groundwater table; second, choose a loose sandy loam soil as possible. If the soil is too viscous, plant the sand and improve it before transplanting; Or less saline-alkali land, the pH value of 6 ~ 8 is appropriate; Fourth, drainage and irrigation is convenient, such as the accumulation of water in the rainy season, must be discharged within 18 hours; Fifth, to avoid the selection of peach, apricot, plum and other stone fruit trees to build gardens.
Second, planting seedlings colonization time in the fall after the fall to the spring before sprouting, the best time before and after the autumn and winter leaves. Before planting, plow more than 25 cm deep into the garden. Before cultivating 667 m2, apply 3,000 kilograms of high-quality soil heterogenous fertilizer (sheep, chicken, pig manure etc.), potassium sulfate compound fertilizer or fruit tree special fertilizer 60 kilograms, and then start the high ridge at a row spacing of 3 meters, and the ridge bottom is 2 meters wide. It is 1 meter wide and 20 to 40 centimeters high. The specific height depends on the situation of water in the garden. Then, on the ridges, a planting hole of 50 cm in length, width and depth was dug at a spacing of 2 meters. After the seedlings are implanted with water, they are covered with a black mulch of 1 meter wide on the ridge surface to facilitate moisturizing of the soil, promote root healing and form new roots, and prevent the growth of weeds in the growing season. Under normal circumstances, do not remove the film all year round.
Third, soil and fertilizer water management and planting The same year, 5,6,7 months for 3 topdressing, each plant 50 grams of urea. 300 times per month sprayed urea and potassium dihydrogen phosphate and photosynthetic fertilizer mixture 2 to 3 times. At the end of May, 8010-6 gibberellin was sprayed to promote the rapid growth of young trees and increase the amount of foliage. From the second year onwards, each year before and after the fall of fallen leaves combined with the whole garden deep-turning early basal fertilization, 667 meters of high-quality soil-fertilizer 3,000 kg or more, while 667 meters 2 of potassium sulfate compound fertilizer or fruit tree fertilizer 100 kg. The emphasis on forced fertilization was carried out in three periods: 60 grams of urea before germination, 100 grams of potassium sulfate compound fertilizer after fruit setting, and 250 grams of nitrogen, phosphorus and potassium compound fertilizer in the mid-fruit development period. After spraying leaves in spring, spraying 300 times urea, 200 times more potassium dihydrogen phosphate and 300 times as much fruit powder as foliar spray every 15 days. In August, 250 g of compound fertilizer with NPK content of 15% was applied to promote differentiation of flower buds and increase the nutrient level of the tree.
Watering should be based on the weather and drought conditions in the orchard. Watering is usually performed before budding, after fruit setting, mid-fruit development, and before wintering.
Fourth, pruning using pruning V-shaped, the main branch 2, lateral branches 2, inserted empty arrangement, the main branch angle of 60 to 80 degrees. Planting the branches to 40 cm in the current year to pick up the heart, when the side branches grow to 30 cm, topping again. A result branch is cultivated every 10 centimeters on the main lateral branch. As a result, the branch shoots are grown to a level of 30 cm when they reach a height of 30 cm, and control their elongation and promote flowering.
Pruning mainly summer scissors. The buds and back buds were wiped off in time to reduce nutrient consumption. When the new shoot reaches 40 centimeters in length, it will be picked in time according to needs. It will continue to remove the upright branches, leggy branches, overweight branches, competition branches, and control temporary branches. After the promotion, it will prevent leggy. Over-expanding shoots can be shortened, promoting shoots and cultivating shoots. Thinning of thinning and thinning of fruits, thinning the ratio of 3 new shoots per fruit. When you are sparse, you have to stay strong. The hard core stage will pick up new shoots to promote fruit development.
For 2 to 3 year old saplings, branches are opened at an angle of 70 to 80 in early spring. During the summer cut, attention should be paid to early elimination of the strong competitive branches standing upright on the back, strong branches and the apex of the main branch, so as to ensure that the main branch extends the advantages of the branches. During winter cutting, it is necessary to adjust the relative balance between the growth potentials and branch weights of the main branches, and to control and eliminate the large branch groups and competition branches near the main branch extension branches to prevent multi-head competition. Adjust the remaining branches and sticks to make them evenly distributed.
5. Application of Plant Growth Regulators The growth of new shoots is controlled from the first year in the summer. Except for opening angles and the result of the branches, the new shoots are sprayed with 200-fold 15% paclobutrazol at a length of 30-40 cm. Powders to reduce shoot growth, shorten internodes and increase flower bud quality. At the same time can also reduce the pruning labor. For juvenile trees over 3 years old, 200 times of paclobutrazol can be sprayed once each in the middle and late June and early July to promote flowering.
Sixth, flower and fruit management Meiqiu nectarine flowers easy, but very few pollen, so when planting red hibiscus and other pollen varieties should be configured as a pollination tree, the percentage of pollinated trees can be about 10%. The ability to set up fruit in the United States and autumn is strong, and pre-harvest physiological fruit drop is light. Therefore, emphasis should be placed on fruit thinning and reasonable load in production. The first thinning of fruit begins 2 weeks after flowering, with emphasis on the removal of fruit, small fruit, and yellow fruit; the second thinning of fruit begins in late May and is based on the standard of one fruit per 20 cm. Set plastic film bags in early June to protect fruits from pests and diseases and produce green fruits. Picking time is about 20 days before picking. 10 days before the ripening of the fruit, the leaves of the fruit-pickup were removed, and the prosperous young shoots on the canopy were shaved off to facilitate the coloring of the fruit.
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