How much fertilizer does poplar apply throughout the year?

According to the fertilizer requirement of poplar fast-growing and high-yield forest, soil nutrient content of woodland, fertilization experimental research data and production practice experience, the fertilization of poplar high-yield forest can generally be made as follows

First, the amount of fertilizer.

In addition to considering the fertilizer demand of poplar itself and the soil nutrient conditions of afforestation land, the influence of poplar species, tree age, stand density and groundwater level should also be comprehensively considered. As far as top dressing is concerned, nitrogen fertilizer and phosphorus fertilizer should be the mainstay, and potassium fertilizer should be applied less, and the ratio should be as follows: n p k = 1 1.

40kg of urea, 40kg of superphosphate and 30kg of potassium chloride can be applied per mu. In addition, the necessary nutrients must be added according to the results of soil analysis. Afforestation can be applied less and later, and more can be applied after the canopy closure of young forests.

Top dressing should be combined with watering to ensure that the fertilizer efficiency is fully exerted.

Second, the number of fertilization.

Poplar fertilization is better in April, May and July and August every year, and half of the annual fertilizer amount is applied each time.

3. Fertilization method.

According to the age of the poplar tree, within the range of root distribution, 4 holes were evenly dug around the poplar tree, and the fertilizer was evenly applied and covered. The fertilization depth is about 15 to 30cm according to the age of the tree.

4. Auxiliary measures.

Apply basal fertilizer before afforestation. More than 1500kg of soil and miscellaneous fertilizer are applied per mu, and about 50kg of superphosphate is mixed in, and the main distribution area of the root system in the tree planting hole is intensively applied. \

Agroforestry intercropping can be implemented during the young forest period, and the fertilizer can be applied to the intercropping crops, which can not only ensure the yield of intercropping crops, but also promote the growth of young forests.

The effect of increasing green manure in poplar fast-growing and high-yield forests is obvious, and it should be actively advocated in places where conditions permit. The specific method is that the annual growth period of the forest tree is 20 30 kg of fresh grass for each poplar, and the position is located at the outer edge of the canopy projection, and the depth is 40 50 cm.

Nitrogen-fixing tree species such as sea buckthorn, black locust and purple locust are reasonably mixed with poplar and used as fertilizer trees, which is beneficial to promoting poplar growth and improving soil fertility.

Straw mulching of forest land, forest birds, and forest fungi polyculture have many benefits. In addition, the fallen leaves of poplars also contain a lot of nutrients, which can be combined with the cultivation of the forest land in late autumn and early winter every year, which is conducive to maintaining soil fertility and increasing the growth of forest trees. <>

The healthy growth of poplars requires a suitable environment, including temperature, soil, moisture, light, biological factors, etc. Fertilizer is not necessary, because the root system of the tree species is well developed, which can make full use of the nutrients in the natural soil, and can ** the nutrients in the fallen leaves after the formation of the forest. If you want to fertilize, ordinary compound fertilizer or organic fertilizer can do.

First of all, it is necessary to choose a suitable site, poplar is hardy and can grow all over China. When afforestation, choose plots with sufficient sunlight, deep and fertile soil, and sufficient precipitation or groundwater.

Secondly, robust seedlings should be selected, the root system should be developed, and the vitality of the seedlings should be high.

Third, the planting density should be appropriate, poplar is a strong light-loving tree species, which needs a large growth space, and the planting density should be more than 3 meters and 4 meters.

Fourth, do a good job in daily management, poplars are resistant to stress, and generally can grow well without care, but if supplemented by artificial loosening, watering, fertilization, pruning and other measures, it will grow faster. Especially in arid areas, young trees need irrigation in winter when the soil is dry.

Finally, do a good job in disaster prevention and control, including fires, pests and diseases, snow disasters, man-made illegal logging, etc. <>

Reasonable fertilization: Fertilization of poplars in the early years can increase the growth base and promote the growth of subsequent years. In the first year after planting, the first fertilizer is applied at the end of May and early June, with kilograms of urea per plant, sprinkled in the base area of 1 2 square meters before the rain, and the second fertilizer can be applied at the end of July, and the amount and method of fertilization are the same as the first time.

In early and mid-May of the second year, kilograms of superphosphate and kilograms of urea were applied to each plant; In early May of the third year, kilograms of urea were applied per plant. The fertilization method is to make a 20 cm deep annular furrow near the outer edge of the canopy projection, or dig a 20 cm deep hole at no less than 3-4 places on the outer edge of the canopy, apply the fertilizer and cover the soil immediately. The latter method should ensure that the holes are evenly distributed in all directions to avoid uneven growth and cracking of the poplar trunk in all directions.

If it is a seedling planted in the same year, the distance of fertilization is twenty or thirty centimeters from the tree, because the root system of the seedling is not developed at this time, so it can be closer.

If it is a poplar tree that has been planted for several years, it must be far away from the root system when fertilizing, because the root system of the tree is developed at this time, and it is necessary to avoid burning the roots. When fertilizing, dig a ditch first, sprinkle an appropriate amount of fertilizer in the ditch, but do not concentrate on sprinkling, you must mix the fertilizer with the soil.

Precautions for fertilization of poplars

When poplars are seedlings, their root system is not very developed, so we need to fertilize it every year to replenish nutrients, but avoid fertilizing too often. In the first year of planting, fertilizer needs to be applied three times, twice in the second year, and once in the third year, because as it grows, the root system will become more and more developed, and more and more nutrients will be absorbed from the soil.

With the continuous growth of poplars, the frequency of fertilization needs to be gradually reduced, but it also needs to be decided according to the quality of the soil. The poplar tree loses its leaves every winter, and its leaves can be absorbed by itself after they are ripe, and if the poplar grows well, it does not need to be fertilized.

In terms of growth years, the best time to fertilize poplars is the second and third years after planting. In terms of a year's time, the best time to apply fertilizer is May to June, and it is enough to apply Bika water-soluble fertilizer once a year. In order to achieve reasonable fertilization, it is necessary to understand the nutrient needs of poplars, and then carry out scientific and reasonable fertilization on this basis.

Apply basal fertilizer before planting, 1500 kg of farmhouse fertilizer and 50 kg of superphosphate per mu. When planting, first dig a 60 * 60 * 50 planting pit, first fully mix the base fertilizer with the topsoil, backfill the height of about 20 cm, and then cover the soil layer with a thickness of 20 cm, and then plant the seedlings, do not let the fertilizer and poplar seedlings root direct contact, easy to burn seedlings, affect the survival rate.

Methods of fertilizing poplars.

Poplar fertilization should be based on nitrogen fertilizer, and the soil with low organic matter content should be used as base fertilizer with farmhouse fertilizer, and then nitrogen fertilizer and phosphorus fertilizer should be applied to promote the growth of poplar. Nitrogen, phosphorus or a combination of nitrogen, phosphorus and potassium applied had better effects than single application.

Therefore, it is best to apply two or three fertilizers in combination, with nitrogen fertilizer as the main fertilizer. According to the soil conditions to determine the dosage and the ratio of nitrogen, phosphorus, potassium, the amount of nitrogen is generally 250 500 grams per plant, nitrogen phosphorus pentoxide potassium oxide = 3 (2) 1. At present, most poplars in various places are fertilized with nitrogen fertilizer, and the tendency to ignore phosphorus fertilizer should be corrected.

Hello dear. The first fertilizer is applied from the end of May to the beginning of June of the first year after planting, and each plant is applied with kilograms of urea, which can be sprinkled within 1-2 square meters of the base of the poplar tree before the rain, and then applied again at the end of July, and the amount and method of fertilization are the same as the first time. In early and mid-May of the second year, each plant is applied with kilograms of superphosphate and kilograms of urea, which can not be applied to the surface, but can be applied in a 20 cm deep annular furrow near the outer edge of the crown projection.

Poplar fertilization in the early years, can increase the base of growth, but also conducive to promoting the growth of subsequent years, at the end of May to early June of the first year after planting, the first fertilizer, urea per plant, can be sprinkled within 1-2 square meters of the base of the poplar before the rain, the second fertilization can be carried out at the end of July, and the amount and method of fertilization are the same as the first time.

Questions. When is the best time to plant poplars.

Poplar trees are generally planted in spring (late March to early April) and late autumn and early winter (late October to mid-November). When planting, try to plant with the seedlings and with the transport. If the seedlings that cannot be planted in time should be properly planted, they can also be soaked in water for 1 2 days if conditions permit, so as to facilitate the survival of seedlings.

Questions. Is there any effect on me soaking for about 7 days?

Not more than 3 days.

It's been 7 days, and it's not much of a problem.

As the saying goes, the plan of the year lies in spring, and the growing season should also lie in spring, so I think we should use compound fertilizer in spring and dilute it with water.

The application of nitrogen, phosphate and green manure to poplar had a significant effect on growth. Mainly nitrogen fertilizer, low organic matter content of the soil, with farmhouse fertilizer as the base fertilizer, and then nitrogen fertilizer, phosphate fertilizer, can significantly promote the growth of poplar.

If poplars want to grow quickly, nitrogen-based fertilizers should be applied.

Poplar Tree Growing Fast Method:

Those who require obvious growth: you can remove the lower branches of the poplar, leaving only the upper and middle branches, so that the plant will grow taller and faster, and you can also spray gibberellin or apply gibberellin solution on the upper branches, which has a good effect. It is also possible to increase the planting density, and when the density is high, the phototropism of the plants helps.

The application of nitrogen-based fertilizers is also effective.

If you need to thicken obviously: you can adjust the planting density first, and under sparse planting conditions, the growth rate of poplars will be slowed down, and the thickening ratio will be more obvious. It can also be sprayed on the leaves or upper leaf shoots:

paclobutrazol, mequartin, etc., inhibit the momentum of upward channeling of branches and increase the thickness. When fertilizing, it is better to use the compound fertilizer of Trim.

Poplar** judgment:

Phosphorus deficiency. The plants are shorter; The leaves are small, the veins and margins are slightly purple-red, and the leaf surface is densely covered with long hairs; The amount of roots is less.

Magnesium deficiency. Plant height, leaf area and leaf number were close to normal plants; In the early stage, the leaf surface is wrinkled and uneven, and the veins are yellowish-green, and in the later stage, there are green spots near the leaf margin, which quickly change from yellow to yellow-green necrotic spots, but the upper young leaves are more normal. There was no significant decrease in the amount, and the root system was longer.

Iron deficiency. The high growth was less inhibited, and the green loss phenomenon began to appear in the 3rd and 4th leaves from the base upwards, and the green around the leaf veins did not disappear, and the green loss of young leaves became more serious the higher up, and the green around the leaf veins became lighter, but the lower old leaves never showed green loss.

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The type of top dressing is generally based on fast-acting nitrogen fertilizer, and 15 kg of urea and 30 kg of ammonium carbonate can be applied per 667 square meters (1 mu) per year, and half of the annual fertilizer amount is applied each time. In spring, the top dressing is mainly ammonium carbonate and binary compound fertilizer, and the ground temperature is low at this time, and the urea fertilizer is slow and the effect is poor.

If you want poplars to grow quickly, it is essential to apply nitrogen-based fertilizers. Poplars themselves have a high demand for nitrogen fertilizer, and if there is a lack of nitrogen fertilizer during the growth process, the trunk will be short. Urea, compound fertilizer, potash or zinc fertilizer can be applied when fertilizing.

2. You can also cut off the branches of the lower part of the poplar tree, leaving only the upper and middle branches. In this way, the nutritional burden of the poplar is not so heavy, and the plant will grow taller faster, and at the same time, applying some gibberellin solution to the branches on the upper part of the poplar tree also has a good growth effect.

Nitrogen fertilizer is good for top dressing of poplars, with low organic content and insufficient fertility in the soil, which can be applied farmhouse fertilizer as base fertilizer. Nitrogen and phosphorus fertilizers can promote the growth of plants.

The time of poplar fertilization is generally when the base fertilizer, seedlings, and mature trees are used, and poplars can choose nitrogen fertilizer, green manure, and phosphorus fertilizer for fertilization.

The best time to fertilize poplars is in May-June, and the fertilizer is mostly urea, and kilograms should be applied per plant. At the end of July, I will give it another time.

1. Poplar fertilization in the early years, can increase the base of growth, but also conducive to promoting the growth of subsequent years, at the end of May to the beginning of June of the first year after planting, the first fertilizer is applied, each plant is applied urea, which can be sprinkled within the range of 1-2 square meters of the base of the poplar tree before the rain, and the second fertilization can be carried out at the end of July, and the amount and method of fertilization are the same as the first time.

2. In the early and middle of May of the second year, each plant can be applied superphosphate urea, and in early May of the third year, urea can be applied to each plant, during which a 20cm deep annular ditch can be opened near the outer edge of the crown projection, or no less than 3-4 places on the outer edge of the canopy, dig a 20cm deep hole, and then apply fertilizer and cover the soil immediately, and ensure that the hole is evenly distributed in all directions.

Second, the method of poplar fertilization:

1. When afforestation, the application of base fertilizer in the tree planting hole has a better effect, jujube can not be used for a long time to provide fertilizer and improve the physical and chemical properties of the soil, the base fertilizer is generally the use of farmhouse fertilizer and slow-acting fertilizer, during which soil miscellaneous fertilizer, cake fertilizer and green manure can be used to press green.

2. Soil miscellaneous fertilizer can be applied 10-20kg per plant, rapeseed cake or cottonseed cake can be applied 2-5kg per plant, applied after crushing, green manure pressed green, 10kg per plant, generally in the year of afforestation do not need to top dressing, because the seedling root system is in the recovery period, the ability to absorb nutrients is relatively weak.

3. Apply 150g of nitrogen, 150g of phosphorus pentoxide, 25g of potassium oxide, 10kg of green manure of purple locust per young tree, and the height growth of young poplar forest can reach 2-3m.

4. Poplar fertilization is generally based on nitrogen fertilizer, and the soil with low organic matter content can be used as basal fertilizer, and then nitrogen fertilizer and phosphorus fertilizer can be applied to significantly promote the growth of poplars. Therefore, it is best to apply two or three kinds of fertilizers together, mainly nitrogen fertilizer, and determine the amount according to the soil strip reed.

5. The dosage of nitrogen is generally 250-500g per plant, nitrogen: phosphorus pentoxide: potassium oxide = 3 (2): 1:, the general urea contains 46% nitrogen, and superphosphate contains P2O514%.

6. During the application of nitrogen fertilizer, phosphate fertilizer and green manure, the growth of poplar with rock balance has a very obvious promoting effect, the volume growth of the fertilization area can be increased compared with the control area, the DBH is higher than the control, the tree height is increased by 69% compared with the control, the effect of green manure is more obvious, and then the effect of phosphate fertilizer and nitrogen fertilizer, and the effect of potassium fertilizer is not good, and chemical fertilizer should be used in combination with green manure.