What is the reason for the unchanged planting?

There are many reasons, but the main ones are as follows: first, the varieties of sweet potatoes are not selected well, and they should be selected for fertilizer tolerance, drought resistance, early tubing, and potato nuggets expand quickly and for a long time; Second, the choice of soil is not suitable, sweet potatoes are not very high requirements for soil acidity and alkalinity, but the soil is required to be soft, moisturizing and water retaining good, more agricultural fertilizer should be applied to poorer ridge land, and sweet potatoes should be rotated in crop rotation, and they will have to change the land next year; Third, there is no reasonable fertilization. Fertilization should be based on the fertilization principle of farmhouse fertilizer, supplemented by chemical fertilizer, base fertilizer, and top dressing; Fourth, the management is not in place, and it is better to plant reasonably densely, no more than 4 plants per square meter, so that sweet potatoes have enough light.

Do not turn over the potato seedlings, only gently lift them and put them in place, preferably on a rack. When the leaf color turns light, it is the time to grow the potato body, and it is necessary to properly apply some manure and potassium dihydrogen phosphate, which is conducive to strong potatoes. I don't know which reason you are in the middle, I hope it helps you.

: If this happens, it may be because the temperature is too low, the temperature is too low, and its growth will be relatively slow, and it must be given enough water, because it needs enough water in the process of growth, so.

Hello, if the planting does not change, it means that there is no fertilizer, or the weather is not very good. Resulting in the growth of crops that are too slow.

There are still a lot of reasons for your good friend Hongzhao to plant the same, if it is inconvenient, it may be because of the climate and other reasons, or the reason for the drawings will cause the inconvenience, I hope to help you.

The reason why he is together is because of his biological characteristics, and it is determined that it is this characteristic in itself, and wherever you are, he always holds his biological characteristics.

For example, some merchants will be busy and have no time to contact the brusher for brushing, so he will entrust the relevant things of brushing to the host, and the host will put the order to the brusher for him, and the host will rely on this to extract commissions, and the income is still very objective.

1. Seedlings. Choose the sunny, leeward soil layer deep and fertile soil as the seedbed, fine land preparation. Potato seeds are generally flat, and the surface level of potatoes is slightly lower than the soil surface and remains consistent to achieve full seedlings.

After the seedlings emerge, the two ends of the agricultural film must be uncovered in time on a sunny day to cool down, and the agricultural film must be covered at night to keep warm. After the seedlings are raised, the film is removed in time, and the top dressing is watered, mainly farmhouse fertilizer. And spray a new high-lipid film to protect moisture and prevent water evaporation, heat preservation and antifreeze, and isolate pests and diseases.

When the temperature stabilizes above 20 degrees Celsius, do not cover the film, and remove the agricultural film.

2. Reasonable dense planting, timely and early planting. Xiaoman to the summer solstice is the best season to plant red roots. Plant sweet potato seedlings on a sunny day, watering first, and then planting.

The planting density is based on the ridge width, reasonable dense planting, reaching more than 3000 to 3500 plants per mu. Then spray the new high-lipid film, which can effectively prevent the water on the ground from evaporating, the water of the seedlings from transpiring, isolate pests and diseases, quickly adapt to the new environment, and grow healthily.

3. Fertilizer and water management. Sweet potato is a potash-loving crop, especially should not be applied indiscriminately, such as a large amount of nitrogen fertilizer, so as not to cause the growth of red vine too vigorously, affecting the yield and starch content.

Note: Fertilization must be timed, preferably 15-20 days after planting, apply a water-soluble fertilizer with Israeli fertile leaves. At the same time, the spraying of new high-lipid film can prevent the infection of pathogens, improve the ability to resist natural disasters, improve the intensity of photosynthesis, and protect the growth of seedlings.

During the expansion stage of potato tubers, high-potassium water-soluble fertilizer was applied to make the nutrient transport duct of underground fruit thicker, improve the swelling vitality of ground fruit, smooth fruit surface, robust fruit shape, high quality and high yield.

Fourth, vine management. Sweet potatoes are long vine crops, suitable fertilizer and water conditions, vines can grow up to 4-5 meters, if not controlled, will seriously affect the yield. Here's how:

Timely cultivation and hoeing of grass and soil cultivation and the implementation of chopped cutting method, and spraying to promote Kao No. 3 can transform plant vegetative growth into reproductive nutrition, inhibit the crazy growth of main shoots, and promote flower bud differentiation. Note that the whole red vine should not be cut, after each short cut, the vine is lifted, put in place, the vine is not allowed to turn the vine in an all-round way, to avoid disturbing the foliar coefficient, conducive to photosynthesis, to promote high yield.

There are two ways, one is to use sweet potatoes to sprout, and the other is to cut off a section of sweet potato vines (no less than 2 petioles), dig a pit in the soil and water the sprouts or vines, and wait for the water to seep dry and bury the soil.

1.Preferably white potato seedlings, put them in a pot and soak them, so that they have just passed the seedling roots.

2.Fertilize the ground, turn the soil, and make ridges 20 cm high and 20 cm wide.

3.Use a small pickaxe to hook a ditch on the ridge surface, 15 cm deep is better, pour water into the ditch, and wipe the sweet potato seedlings in the ditch at an interval of 20 cm.

4.Bury the ditch with soil.

5.In the future, you can beat the seedlings, and when the seedlings grow to more than 10 leaves, pinch off the tips.

Soft soil is used to grow sweet potatoes, which is convenient for sweet potatoes to grow, and at the same time, it will not be too difficult to harvest in the later stage. Before planting, turn the soil over once, mash up large pieces of mud, and remove weeds inside. It is best to stir some farmhouse fertilizer and put it inside, or you can put some compound fertilizer.

Then buy a few sweet potatoes to go home, wash the soil, soak them in a basin filled with water, and change the water every 1-2 days to prevent rotting. In about 1-2 weeks, the sweet potato will have white roots.

Prepare a flower pot with a diameter of at least 25 cm or more, or a flower platform to put one end of the sweet potato root vertically, plant it into the soil, the upper end does not need to be completely buried, you can expose a little head, the soil quality is not required, and it is watered once after planting.

After a period of time, the upper end of the sweet potato will sprout, so let it bask in the sun more and keep it dry and watered.

When the melon vine grows to 5-8 cm long, you can pinch off the top of it, and new vines will grow on both sides after pinching off, and then pinch off the top when the new vine grows to 3 cm. Pinch off the sweet potato leaves, wash them and stir-fry them, which is very good for the body, and you can't eat them all while pinching.

In autumn, remove all the stems of the melon vines and pour out the potting soil, and you can harvest a full sweet potato!

[1. Sweet potato seedling technology].

1. Seed selection.

1. Soil preparation and fertilization: land preparation should be carried out on a sunny day, the soil should be broken and fine, and after leveling, the fertilizer strip should be applied to the bottom of the ridge, the ridge distance is 80 cm, and the ridge height is about 20 cm. Fertilizer can use special organic compound fertilizer, when the planting area is larger, it is required to measure the soil N, P, K and organic matter, and the soil pH value should be measured in the south, and the use of ordinary compound fertilizer is not recommended.

2. Pruning and topping: For potato fields with more branches and more vigorous growth, two or three branches can be cut off with scissors, so that the nutrients can flow back and the potato pieces can get more nutrients. Topping can adjust the nutrient operation, promote the delivery of nutrients to the roots, when the potato seedlings grow to 40 60 cm, remove the tender tips, and when the branches grow too vigorously, they should also remove the tender tips.

3. Timely top dressing.

Seedling fertilizer: about 15 days after transplanting, combined with the first tillage, 750 1000 kg of thin human and animal manure or kg of urea per mu is applied.

Potato fertilizer: top dressing in the branching potato setting stage, generally combined with the second tillage within one month after cutting, with nitrogen fertilizer as the main fertilizer, combined with phosphorus and potassium fertilizer.

Seam fertilizer: after the stem and leaf are sealed, the growth rate of the root is faster, and when there are cracks in the ground, top dressing per mu of urea, 10 kg of superphosphate leaching solution, 3 kg of potassium sulfate mixed with water 150 200 kg of nutrient solution, watering along the seam in the afternoon of cloudy or sunny days, requiring uniform topdressing.

1. Early stage: The early stage is from planting seedlings to sealing pots, spring potatoes last about 60 70 days, summer potatoes about 40 days, the stem and leaf growth is slower, the root system develops faster, and it is a period dominated by growing fibrous roots.

2. Medium-term: The middle period is the peak of stem and leaf growth from the pot to the end of the pot, the spring potato lasts about 50 days, the summer potato is about 30 days, the tuber root expansion is slower, the stem and leaf growth is fast, and it is the period when the stem and leaf are mainly grown.

3. Late stage: The later stage is from the beginning of the decline of stems and leaves to harvest, spring potatoes after late August, summer potatoes after early September, this period is the main period of root expansion.

The place where sweet potatoes are grown.

China's sweet potato planting production areas are mainly distributed in Beijing, Shanxi, Shandong, Henan, Tianjin, Hebei, the three eastern provinces, Inner Mongolia, Yunnan, Sichuan, Hubei, Gansu, Anhui, Fujian, Shaanxi, Hunan, Guangdong, Jiangsu, Jiangxi and other places, the main producing areas are Anhui Sixian (China's hometown of yams), Hebei Lulong, Fujian Liancheng, Henan Kaifeng, Dengzhou, Tanghe Tongzhaipu, Shandong Surabaya, Sichuan Nanchong and other regions.

To have a high yield of sweet potatoes, we must first do the following five things:

Clause. 1. Reasonable selection of seeds and timely planting.

Comprehensively consider land resources, product use, pests and diseases to select the appropriate high-yield and high-quality varieties, timely seedling, according to statistics, one day per night, will reduce the yield by about 3%, so, early loading, prolong the growth period of its sweet potato, early fruit, early expansion, is to ensure the basis of high yield of sweet potato.

Clause. Second, high ridges, dense planting.

High ridges are also an important measure to promote the high yield of sweet potatoes, in sunny weather, the standard of good potato ridges is short, noisy, and transparent, which is conducive to drainage, increase the voids of the soil, and promote the permeability and water retention capacity of water. The ridge spacing is 70-80 cm, the ridge height is 25-30 cm, and about 4000 trees per mu are the most suitable.

Clause. 3. Topping and vine lifting.

For the first topping, when the main vine grows to about 40 cm, remove the growth point of the main vine; The second topping is when the branches grow to 30 cm, remove the growth points of the branches, and after topping, the branches can be increased, which promotes photosynthesis, and at the same time shortens the distance between roots, stems and leaves to transport nutrients, which can quickly promote the expansion of the tuber. Vine, when the vine leaves are vigorous, lift the vine by hand, and then place it in place, can not destroy the original hierarchical structure of the leaf, can inhibit the stem node to produce adventitious roots and vine leaf growth, generally every 10-15 days to lift the vine 1 time, the vine can be significantly increased twice.

Clause. Fourth, skillfully apply foliar fertilizer and chase swelling fertilizer.

As the saying goes, "a sweet potato is a handful of ash, and the sweet potato is a big pile", it can be seen that sweet potatoes love potassium fertilizer, according to scientific analysis, the ratio of nitrogen, phosphorus and potassium in the tubers of sweet potatoes is 2:1:3, it can be seen that sweet potatoes have a very large demand for potassium fertilizer, and nitrogen fertilizer will remain in the general soil, and the focus of high yield of sweet potatoes is to apply potassium fertilizer reasonably.

Can be sprayed on the foliar surface of potassium dihydrogen phosphate, or superphosphate and urea aqueous solution, sprayed once every 7-10 days, sprayed twice, or directly sprinkled on the leaf surface with 50 kg of plant ash per mu, or 15 kg of plant ash to 50 kg of water, soaked for 24 hours after the leaching solution, sprayed on the leaf surface on a cloudy day or evening, sprayed once every 10 days.

When the sweet potato swells to crack out of the ground, at this time to apply bulging fertilizer to promote the absorption of nutrients by the roots, with potassium dihydrogen phosphate per mu, add 400 kg of water, or 10 kg of urea and 10 kg of superphosphate, add 500 kg of water, and make fertilizer to irrigate cracks. Half a month later, each mu is filled with 100 kg of plant ash and 500 kg of water (soaked for 4 hours) of leaching solution and sealed.

Clause. 5. Prevention of pests and diseases.

Sweet potatoes are prone to leaf curls in the later stage of growth, and targeted agents can be used to spray and control with 500 times of new high-fat film, and the spraying effect is best at 4 or 5 o'clock in the afternoon.

Sweet potatoes are the number one anti-cancer among vegetables and fruits, so eat more sweet potatoes.

Compared with other fruits, it is basically free of pests and diseases, and is resistant to drought and waterlogging. There are almost no diseases, the insect pests are mainly the East Asian locusts that eat the leaves, and the larvae (meat worms) of the moths, which are dealt with cypermethrin drugs, and there are several solutions to underground pests: 1. Crop rotation 2. Choose sandy loam soil, which is not conducive to pests, and the sweet potato is profitable in the later stage 3

When ploughing, highly toxic pesticides such as carbofuran, phosphine and other high-residue pesticides such as phosphine and phosphine thiophosphine are all systemic + fumigation + more than 1 year residue period. At present, the third way is widely used in potatoes and corn, you don't see potatoes are long and slippery, my own potatoes are gnawed big holes, every year, many years later, I know that the potatoes sold by people are sprinkled with carbofuran is all beautiful, alas, no way, this is a consumption-oriented society, what kind of products are pursued by people in the city, what kind of things will appear in agriculture,

Pesticides need to be applied.

In the process of growth and development of sweet potato, the leaves are harmed by the pest of "leaf roller borer", which affects the accumulation of photosynthetic efficiency products of leaves, affects the expansion of potato pieces, and reduces the yield.

In the early stage of leaf roller borer, 30-50 kg of aqueous solution such as 1% emamectin benzoate emulsifiable concentrate of 800-1000 times was sprayed on the foliar surface, and the control effect was more than 90%.

In the early stage of tuber expansion, foliar spraying of "sweet potato bulking hormone" every 7-10 days, and spraying 2-3 times in a row, the yield increase effect is significant.

Note: "Sweet potato bulking hormone" products are selected without growth hormone.

Nutrient copying sweet potatoes have strong fertilizer absorption ability and are resistant to barren and thin attacks.

However, for high yields, sufficient fertilizer must be applied. In addition to nitrogen, phosphorus, and potassium, sulfur, iron, magnesium, calcium, etc. also play an important role. Among the three elements, sweet potatoes have the highest requirement for potassium, followed by nitrogen and phosphorus.

According to analysis, every 1,000 catties of sweet potatoes contain nitrogen, phosphorus, and potassium. Therefore, the application of potassium fertilizer and the timely and appropriate application of nitrogen and phosphorus fertilizer can significantly increase yield.

The soil is a sandy loam soil and sandy soil with deep soil layer, rich organic matter, loose soil, aeration and good drainage performance. When the soil is clay and heavy, the root skin color is not good, rough, the potato shape is not neat, the yield is low, and it is not resistant to storage. However, sandy loam soil and sandy soil generally have low fertility and poor water retention capacity, so soil fertility should be gradually fertilized through fertilization and other measures to obtain high yield.

Sweet potatoes are more resistant to acid and alkali and adapt to the pH range of about, but it is appropriate. When the soil salt content is exceeded, sweet potatoes should not be planted.