What foliar fertilizer to spray leeks in greenhouses, and what herbicides to use for leeks in greenh

Generally, when the leek seedlings are 12 15 cm high, combined with watering, the secondary fertilizer, ammonium sulfate 20 kg mu. After a hot summer, leeks enter a cool autumn. At this time, it is the most suitable growth stage for leeks, and it is a critical period for fertilizer and water management.

The overwintering ability of leeks and the growth of the next year mainly depend on the amount of nutrients accumulated by the plants before winter, and the accumulation of nutrients is determined by the growth status in autumn, so we should pay attention to the fertilizer and water management at this stage. Generally, it is necessary to chase 2 or 3 times of fat. In the northern region, the fertilizer was applied once in early and late September, and 15 20 kg of ammonium sulfate was applied with water.

In early October, apply ammonium sulfate again once (the dosage is the same as above) or apply 1 time of fecal thinning. Top dressing method: 2 3 days after the leek harvest, when the new leaves grow 2 3 cm high, combine watering to chase 15 20 kg of ammonium sulfate mu.

Do not water or fertilize immediately after harvesting, as this can easily cause rhizome rot. After harvesting, after the leeks have new leaves and grow together, neocontinental uranenin is sprayed every 20 days, which can effectively improve the yield of leeks. The foliar surface of greenhouse vegetables can be fertilized by spraying.

Potassium dihydrogen phosphate was sprayed every seven days during the growth period of foliar fertilization of leeks. During the growth period, potassium dihydrogen phosphate was sprayed once every 7 days, and the concentration was 300 times the solution.

As long as the nitrogen content is relatively high, it is fine.

Answer, weeding before germination after sowing Weeding pass. It is a new type of herbicide, ideal for newly sown leeks, good weeding effect, residual effect period of 4o 5o days, 33 weeding pass 1o0 150 grams per mu, about 5o kg of water, ground spraying. Dilomide.

A herbicide for leek field, which is basically safe for leeks and has a good weeding effect, with a residual effect of about 3o days. Nianfeng uses 200 grams of 48 dilometin emulsifiable concentrate per mu, about 5o kg of water, and sprays on the ground. 1 Post-emergence soil treatment of leeks The herbicides used in this period should be selected with no or mild damage to leeks, and the focus is on preventing new weeds from coming out.

The main herbicides used are 33 herbicide 1o0 150 grams per mu, 48 fluoralin EC 1o0 150 grams, 48 dilometin EC 200 grams, and 5o prometrium or wet powder 1o0 grams. (Choose any 1 herbicide, spray with water according to the requirements of the instructions) spraying time and ground moisture to grasp well, for soil treatment agents are used when weeds have not yet come out, spray wet ground to form a film to eliminate weeds in the bud. 2 leeks after the emergence of stem and leaf treatment or the first use of herbicides has passed, artificial weeding is too late, weeds in large quantities and the formation of grass shortage, can be used stem and leaf treatment methods, commonly used herbicides are as follows:

2o 65 1 00 grams per mu mixed with 50 kg of water can prevent some broad-leaved grasses, but it has no lethality to broad-leaved grasses (such as purslane, etc.). Stem and leaf treatment agents such as quinoxalin and high-efficiency flupyrimethoxalin can be used to control gramineous weeds, which is safe for leeks. After the weeds are dried up, they should be manually pulled out or treated according to the previous method to prevent the recurrence of weeds.

Nitrate nitrogen fertilizer, unrotted farmhouse fertilizer, plant ash, etc. are recommended for leek fertilization.

1. Sheep dung. Sheep manure has a high organic matter content and can significantly increase soil fertility after application. Secondly, sheep manure can loosen the soil, and the effect of improving the soil is obvious.

Thirdly, sheep manure is rich in potassium, which can promote the synthesis and transportation of carbohydrates, and it can be said that sheep manure is a high-grade organic fertilizer.

2. Cake fat. Cake fertilizer is the residue left after oil extraction such as rapeseed cake, peanut cake, soybean cake, etc., the content of organic matter in cake fertilizer is very high, and the calorie of cake fertilizer is very high, and it must be fully decomposed before it can be applied. The cake fertilizer needs to be stacked for 3 months under natural conditions to complete fermentation, if you want to ferment the cake fertilizer quickly.

3. Grass ash.

If you have plant ash at home, then it's best to grow leeks with plant ash. The main component of plant ash is potassium carbonate, which mainly contains potassium, and it also contains almost all micronutrients such as iron, zinc, silicon, boron, molybdenum, etc.

Precautions for leek farming

1. Seed selection.

It is recommended to choose full, no impurities, no insect mouth, cold and insect resistance, heat resistance, and strong tillering varieties.

2. Treat the seeds.

Dry it for one to two days, then put it in water about 40 degrees for cleaning, soak it for half a day when the water temperature reaches about 30 degrees, and then put it at room temperature for germination, 85% of the seeds can be sown when they begin to sprout.

3. Strengthen field management.

After planting, water twice in a row, hoe and squat seedlings in time, the soil is semi-dry and wet, and it should be drained in time when it enters the rainy season. Due to the heavy rain in summer, it is necessary to reduce the amount of watering and pay attention to drainage and timely clean up the yellow leaves and leeks near the ground according to the actual situation.

Leeks are one of the common vegetables in our lives, leeks are adaptable, cold and heat resistant, and are cultivated everywhere in China. Especially some friends in the countryside like to grow some small vegetables around the house, and leeks are one of them. In the process of planting leeks, fertilization is very important and determines its growth, so what fertilizer to apply to planting leeks?

1. Base fertilizer: Generally, farmers will have chickens, pigs, and cattle at home, so they will not lack farm fertilizer, but it should be noted that when using farm fertilizer as base fertilizer, we must use fully rotted farm fertilizer. In this way, harmful bacteria in the fertilizer can avoid invading the soil and plants, and leeks will not be free from pests and diseases.

2. Compound fertilizer: Compound fertilizer is mainly nitrogen fertilizer. In particular, the application of seedling fertilizer, nitrogen fertilizer can be used as the main nutrient, sufficient nitrogen fertilizer is conducive to the growth of leeks, after cutting a stubble, we must timely top dressing high nitrogen compound fertilizer, and at the same time can supplement trace elements, so that leeks can absorb nutrients balanced, nutrient-sufficient fertilizer.

3. Grass ash: plant ash is very common in rural areas, but often we will ignore its role, it is actually a particularly good fertilizer, there is a large amount of potassium in plant ash, the wonderful use of plant ash, can increase the yield of leeks. Grass ash can make leeks take root as soon as possible and increase yield significantly, while leeks in greenhouses are prone to gray mold, and plant ash can effectively prevent the occurrence of this disease.

Leeks can be planted before the application of base fertilizer, with the prepared human manure or ammonium sulfate, in the leek growth period, should be combined with watering, top application of nitrogen fertilizer 2-4 times, after the leeks flower, you can pinch off the young flower sprouts, reduce the loss of nutrients, in order to facilitate the root, at this time can be applied 1 to 2 times of thin human feces, autumn can harvest leeks 1-2 times, need to top dressing 1-2 times, stop harvesting in late September.

Leek topdressing time.

The best topdressing time for leeks is before and after the beginning of autumn, so as to ensure the growth needs of leeks and ensure that they accumulate and return to the camp in the future, and the leeks can start topdressing after they survive, and it is recommended to top dressing every 5-6 days, until harvesting, and then every harvest should also be topdressing once or twice.

What fertilizer is used for leek top dressing.

Leeks can be planted before the application of base fertilizer, with the prepared human manure or ammonium sulfate, in the leek growth period, should be combined with watering, top application of nitrogen fertilizer 2-4 times Xiangtong.

Leek top dressing with urea or compound fertilizer.

Leek top dressing should use compound fertilizer, leeks themselves are very adaptable to the soil and the environment, but it is best to choose loose tillage, fertile soil planting, and leeks in the growth process, need a large amount of nitrogen as a supplement, but also with an appropriate amount of phosphorus and potassium fertilizer, the purpose of this is to improve the yield and quality of its main edible parts of the leaves and leaves.

Leek topdressing method.

Leek seedlings height in 12-15 cm need to be combined with watering for top dressing, ammonium sulfate or a human feces, top dressing during the growth period pay attention to the combination of trace elements and large elements, organic fertilizer plus inorganic fertilizer combination, but also add spray high lipid film, to ensure the survival rate of leeks, but also effectively improve the effective ingredient rate of fertilizer.

Precautions for leek top dressing.

Leeks are not tolerant of thick fertilizer and raw fertilizer, pay attention to the principle of thin fertilizer when fertilizing, apply the base fertilizer to be fully rotted, but also dilute with water, the temperature is higher, the light intensity can not be fertilized at noon, otherwise the heat generated by the fertilizer will burn the roots, resulting in the death of the whole plant.

After the leeks flower, you can pinch off the young flower sprouts, reduce the loss of nutrients, in order to facilitate the root, at this time can be applied 1 to 2 times of thin human feces, autumn can generally harvest leeks 1-2 times, need to top dressing 1-2 times, in late September can stop harvesting and top dressing.

Planting leeks should avoid applying these three fertilizers.

1. Nitrate nitrogen fertilizer.

Leeks like nitrogen, nitrogen fertilizer for the growth of leeks has played an important role in promoting, but in the application of nitrate nitrogen fertilizer should be noted, the concentration is too high easy to burn roots and fertilizer damage, so if the application of nitrate nitrogen fertilizer should be controlled, not too much at one time, even on cloudy days to reduce the amount of use, can not be mixed with compound fertilizer and water soluble application.

2. Undecomposed farmhouse fertilizer (also known as organic fertilizer).

1) Farm fertilizer includes human manure, manure, livestock and poultry manure, etc., its advantage is that the nutrients are relatively comprehensive, abundant, easy to take materials, low production cost, and also has a very large ability to improve soil fertility, which is a very ideal fertilizer for crop planting. The fertilizer effect of farmhouse fertilizer is slow and lasts for a long time, and it has an irreplaceable role as a base fertilizer.

2) But the use of farmhouse fertilizer needs to be fully decomposed, on the one hand, the nutrients in it can be effectively absorbed, on the other hand, the unrotted farmhouse fertilizer will release a lot of heat in the process of fermentation, if directly applied will burn the roots of crops and even burn the crops, at the same time, there are many harmful bacteria and pests and diseases in the unrotted farmhouse fertilizer, which will cause harm to crops.

3) Therefore, the farmhouse manure can only be used after it is fully decomposed, that is, it is piled up for more than 60 days, it becomes black and rotten, there is no big lumps, and it feels loose and soft when grasped by hand.

3. Ammonium carbonate (ammonium bicarbonate).

Ammonium carbonate is also often used as a nitrogen fertilizer, which can promote the photosynthesis of crops and promote seedling growth. But it has a disadvantage, that is, it is volatile, the utilization rate of nitrogen is relatively low, and if it is not properly disposed of, there is too much residue on the surface, and the ammonia formed by volatilization will smoke the leaves of leeks, so it should be applied in a ditch and covered with soil in time.