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Sweet potato is a kind of crop that is easy to plant to harvest roots, and new plants can be propagated directly with sweet potato seedlings, but after planting, the existing sweet potato seedlings appear, the roots are less and the roots are slow, and even the phenomenon of planting can not survive, which has a great impact on the yield of planted sweet potatoes, what causes it?It is commonly found in the following:
1, high temperature and drought, sweet potatoes like to grow in warm conditions, generally wheat stubble sweet potatoes, is the crops planted in summer, if the planting simply encounters high temperature, survival is no problem, if it coincides with drought at this time, high temperature and drought, soon the sweet potato seedlings will be roasted and dehydrated, the sweet potato seedlings have not yet taken root, resulting in a gap between the sweet potato seedlings and the soil, there is not enough water, the sweet potato seedlings do not take root, and even die of drought, therefore, when planting sweet potato seedlings in summer, it is necessary to water enough planting water, after the water seeps down, the outside is covered with a thick layer of soft soil to play the role of moisture and water retention, so that the sweet potato seedlings can quickly take root and survive。
2. The soil is poor, and the sweet potatoes are planted in the poor soil, and the sweet potato seedlings do not get enough nutrients, and the growth is slow and the roots are few. Poor soil, often showing salinization, soil compaction, poor air permeability, etc., will affect the normal rooting and survival of sweet potato seedlings.
3. Burning seedlings, in order to improve the yield of sweet potatoes, some friends fertilize a large number of sweet potato fields, and the organic fertilizer is not fully decomposed, and after being implanted in the soil, heat and organic acids are generated in the process of secondary decomposition, resulting in sweet potato seedlings can not be rooted normally and suffer. When chemical fertilizers are applied in the field, too much nitrogen fertilizer will also affect the rooting of sweet potato seedlings, not to mention to survive, fertilization, burning roots and seedlings, which are more common in the process of planting sweet potatoes.
4. Improper application of herbicides, sweet potatoes have relatively strict requirements for herbicides, and special herbicides can be selected for sweet potato fields to control weeds in the field, such as potato worry-free, potato Lyspor, diphenyl ether oxate, potato Daan, etc. However, some long-term high-residue herbicides may cause harm to sweet potatoes, resulting in disadvantages such as no rooting, less rooting, and poor growth of sweet potato seedlings. The crops planted in the previous stubble used chlorsulfuron-methyl, and herbicides containing chlorsulfuron-methyl, and the next stubble should not be planted with sweet potatoes, because after the use of this herbicide, planting sweet potatoes within 40 months may cause damage to sweet potatoes, sweet potato seedlings have poor rooting, slow growth, and even cannot be planted to survive. Sulfasulfuron herbicides, nicosulfuron herbicides, thiasulfuron herbicides, etc. are herbicides that have a good control effect on broad-leaved weeds, and also have a good killing effect on sweet potatoes, so the use of this kind of herbicide in sweet potato fields will also cause sweet potato seedlings to be damaged and unable to grow.
5, excessive use of plant ash, sweet potato likes potassium fertilizer, and plant ash contains more potassium elements, generally fresh plant ash contains about 1% potassium, if a large number of plant ash is concentrated in the small area of planting sweet potato, it will cause the soil alkalinity is too large, sweet potato seedlings are not rooted after planting, rooting is slow, and even can not be planted to survive, seriously affecting the yield and quality of sweet potato. Well, that's all for the sharing of this chapter, welcome to follow, like friends who like it and then go.
The author Mu Yu listens to the wind, has many years of technical experience in agricultural production, and has accumulated rich experience in how to achieve high quality and high yield in planting crops, if you have related questions, please feel free to consult me, click on the card below to ask me questions.