Huang Yang's growing habits:
It is resistant to shade and likes light, and can maintain good growth under indoor and outdoor conditions. In the long-term shading environment, although the leaves can remain green, it is easy to cause the branches to grow white or weaken.
Like wet, can withstand rainy weather for about a month, but avoid long-term water accumulation.
Drought tolerance, as long as the surface soil or basin soil is not completely dry, there is no abnormal performance.
Heat-resistant and cold-resistant, able to withstand summer exposure and the cold of MINUS 20 degrees Celsius, but it should be ventilated when it is hot and humid in summer.
The requirements for soil are not strict, and light and fertile sandy loam is better. Potted plants can also be made of vermiculite, peat or soil, which has strong alkali resistance.
Strong tillering ability, pruning resistance and easy molding.
Leaves will turn red in autumn after full illumination and dormancy.
The flowerpot can be changed or transplanted in four seasons. When transplanting or sprouting in summer, we should pay attention to shading to prevent the soil from getting too wet, otherwise the original leaves will fall off easily.
Cultivation management in Huang Yang;
Poplar is not strict with soil. Sandy soil, loam soil and brown soil can be planted, but it is best to be rich in organic matter.
Land: The land type should be flat during land preparation. Combined with deep tillage and organic fertilizer, the yield per mu is about 2000 kg. When applying base fertilizer, we should pay attention to the fact that organic fertilizer must be fully decomposed and deeply applied in planting holes.
The planting time is under the climatic conditions in Beijing, and the seedlings are mainly planted in spring, usually in early April? Qingming? The first two or three days will be fine.
General spacing of poplars planted in the open field: 0.5? 1.5 or 0.4? 1.2m, planting about 1000 ~ 1500 plants per mu. With the growth of tree age, seedlings can be raised every other plant in the future. The nutrition pot seedlings of poplar in Hokkaido can be planted in pits or ditches.
Before planting seedlings, mark designated points according to the planned row spacing, dig holes according to the points or ditch according to the planting row spacing, and the ditch depth should be greater than the root depth of seedlings, about 40 cm deep.
Before planting, base fertilizer should be deeply applied, and fully decomposed organic fertilizer should be mixed with soil and applied to the bottom of the hole. When planting, take out the nutrient bowl from the seedlings, ditch according to the spacing between plants, make the roots contact the soil, fill the soil and step on it. When stepping on the soil after covering it, don't crush the soil ball, but step on the gap between the soil ball and the tree hole. The depth of covering soil is slightly deeper than the original soil seal, so as to avoid soil subsidence and root system exposure after irrigation, which will affect the survival.
Watering is the main measure to ensure the survival of seedlings, especially in northern spring, when there is less rain and more evaporation. If the water supply is insufficient, the survival rate of seedlings will be seriously affected. After planting seedlings, the soil between rows can be ridged every 4 ~ 6 rows to facilitate irrigation. It is required to water the seedlings for the first time within 24 hours after sowing, for the second time every 3-5 days and for the third time every 5-7 days. After three times of irrigation, it can be decided whether to irrigate according to the weather and seedling conditions. The amount of water should not be too large or too small. If there is too much water, the soil will become soft and the seedlings will easily lodging. Too little water affects survival. After irrigation or heavy rainfall, seedlings are prone to lodging, tilting or exposing their roots. If this happens, it should be straightened, ridged and covered immediately, otherwise, with the germination and growth of seedlings, the seedlings will become bent in a few days. When supporting the seedlings, you can dig up the soil near the roots of the seedlings, straighten the seedlings, find the direction between the straight line and the plants, and then return the soil to be practical. After planting seedlings three times in a row, when the soil in the seedbed sinks and pits appear, it should be leveled and filled in time. It can also be combined with intertillage to level the ground, so that the seedlings can get the same amount of water and prevent uneven drought and flood. Poplar likes water, what should be mastered in watering? Wet is better than dry? The principle of. At seedling stage, the root system is shallow and sensitive to water. Generally, the surface soil should be kept moist, and a small amount of irrigation should be carried out many times. In the fast-growing period of seedlings, the growth is rapid and the water demand is large, so it should be irrigated with large water to make it dry and wet clearly and thoroughly. However, irrigation should be stopped in the late growth stage to prevent seedlings from growing white and promote lignification. Generally, watering should be controlled at the end of summer. Irrigation time: it is best to water it once in the morning and once in the evening, not at noon when the temperature is the highest.
Intertillage weeding is a routine work in seedling management. Tillage and weeding are two concepts, but they can be combined. Generally, intertillage weeding is best carried out after rain or irrigation. When the soil is wet, uproot the grass and loosen the soil well. Soon after the seedlings are newly planted, most of the soil surface layer is exposed to the air, which is not only extremely dry, but also easy to breed weeds. During this period, intertillage weeding should be carried out in time to promote the root development of seedlings. Generally, the root system of seedlings should be cultivated shallowly, and the rows between plants can be deepened appropriately, generally 3 ~ 5cm. Cultivation in rainy season can promote gas exchange and evaporation of gaseous water, and prevent seedlings from waterlogging. The northern area is generally dry in spring and weeds have stopped growing in autumn. During these two periods, intertillage was the main method, and weeding was the main method in summer. The fast-growing period of weeds is around the rainy season. During this period, weeding should be strengthened and the principle of early weeding, small weeding and large weeding should be adhered to. For perennial weeds, all underground parts must be dug up, otherwise it will become more and more difficult to remove.
Topdressing can timely supplement the demand for nutrients in the vigorous growth period of seedlings, promote the growth and development of seedlings and improve the quality. Boxwood in Hokkaido needs more phosphorus in seedling stage, more nitrogen in peak season and more potassium when it stops growing in autumn. After the seedlings are planted, 0.4% potassium dihydrogen phosphate solution can be sprayed on the leaves, which should be done in cloudy days or humid air in the morning and evening. Generally, potassium dihydrogen phosphate can be sprayed on leaves three or four times a month. Newly transplanted poplar seedlings in Hokkaido should be fertilized in the early stage, but the fertilizer concentration should not be too high to avoid burning new roots. In the fast-growing period of seedlings, the amount and frequency of fertilization should be increased, at least once a month. Urea can be used as topdressing nitrogen fertilizer, which can be divided into dry application and wet application. Dry application can be spread and furrow application. Spreading is to spread the chemical fertilizer evenly on the soil between seedlings, and cover the soil with shallow hoe 1 ~ 2 times after spreading; Ditching is to ditch between rows of seedlings, generally at a distance of 15 ~ 20 cm from the root of seedlings, apply chemical fertilizer into the ditch, and then cover the soil. When ditching, we should pay attention to the depth of ditching in the root distribution layer, so as to facilitate the seedlings to absorb fertilizer. Wet application is to dissolve fertilizer in water and spread it on the seedbed or between rows. It is best to water it again after application to avoid burns. The application of nitrogen fertilizer should be carried out in spring and summer, and the last application of nitrogen fertilizer should not be later than? Beginning of autumn? . Prevent seedlings from growing in vain and reduce the overwintering ability of poplar seedlings in Hokkaido. Nitrogen fertilizer must be stopped from August to September, and phosphorus and potassium fertilizer are the main ones. Promote the lignification and root growth of poplar seedlings in Hokkaido and improve the cold resistance of seedlings.
The shaping and pruning of boxwood in Hokkaido itself has a strong top advantage, strong germination and relatively weak branching ability. Through proper pruning, the ideal trunk and plump lateral branches can be cultivated, making the tree complete, symmetrical, compact and fruitful. Boxwood in Hokkaido is suitable for pruning in winter and summer. Generally, plastic pruning is mostly carried out in the summer and autumn tree growing season. Through shaping and pruning, the cut branches can be cut and propagated. Shaping is generally aimed at small trees, and pruning is aimed at big trees (or big seedlings). The pruning at seedling stage is of great significance to the tree body and posture in the future. Poplar seedlings in Hokkaido generally have obvious main stems, and most of the lateral branches are born in the middle and lower parts of the trees. Trunk is generally not used for plastic pruning. The purpose of keeping trunk is to keep the growth potential of the top, so that the tree can grow straight and tall in the future. For the lateral branches at the base of young trees, the whole branch can be cut short; Or cut it lightly and cut it short, leaving only a few buds. As an ornamental tree, boxwood in Hokkaido is mostly pointed and conical. Under normal circumstances, the pruning of adult trees is only to cut off the long branches and competing branches growing on the trunk to avoid the phenomenon of double-headed and double-dry. If there is a phenomenon of bulls, which affects the height development of the crown, we should find out the main branches or replace them as soon as possible to cultivate high growth advantages and make the lateral branches evenly distributed. Generally, when cultivating skeleton branches, only 30 ~ 40 cm trunk is exposed at the lower part, and the main branches are evenly distributed at the upper part; Depending on the future application, you can also keep the trunk high as needed.
At the seedling stage, the seedling tissue is tender, the planting time is not long, and the plant root system is underdeveloped and deeply rooted. At this time, the resistance of seedlings is not strong. Seedling protection is very important. Correct cultivation techniques must be adopted in production to promote the growth of seedlings, enhance their stress resistance, create environmental conditions that are not conducive to the occurrence and development of disaster factors, and improve the yield and quality of seedlings.