The latest time and method of controlling the growth of sweet potato

In sweet potato production, due to the influence of external factors such as too much nitrogen fertilizer, too much water and fertilizer, high temperature and heavy rain, it will lead to more and more prosperous growth, and even the phenomenon of growing seedlings without tuber. Therefore, to control the prosperity of sweet potatoes is to increase production and improve quality is the ultimate goal. So how to control the prosperity of sweet potatoes? Come and have a look with the editor.

1. Control boom time

When the sweet potato expands for the first time, the length of the vine is about 35-45 cm, when the sweet potato is in the period of branching and tuber formation, the above-ground branches and underground potato lumps are formed, so it is necessary to control them moderately. The second prosperity control is generally 65-70 days after planting, when it is the season of high temperature and humidity, and it is also the period of vigorous growth of sweet potato stems and leaves, but the expansion of potato lumps is slow, so we should focus on controlling prosperity at this time. The second boom control is about 85-90 days after planting, when the stem and leaf growth of sweet potato reaches its peak and prepares for the second expansion period.

2. Tito controls Wang

Generally speaking, when the sweet potato vine is 40cm to 50cm long, the vine control effect is the best, its main purpose is to prevent the sweet potato rattan root growth, control the loss of nutrition, but also effectively prevent the sweet potato vine from growing. Just lift the sweet potato vines gently so as not to hurt the stems and leaves, as long as you prevent the fibrous roots from growing, and if you turn the vines to control prosperity, it is the reverse of the vines, which is very easy to cause damage to the sweet potato stems and leaves, and if the stems and leaves face the ground, it may also affect the photosynthesis of sweet potatoes, resulting in a reduction in yield.

3. Cutting vines to control prosperity

Cutting vines and controlling prosperity is a common method of controlling prosperity in small-scale planting in rural areas. in the past, sweet potato vines were mainly used to feed pigs. In the case of high temperature and rainy summer, sweet potato vines grow very fast, so sweet potato vines will be cut to feed pigs. Not only control the growth of sweet potato vines, but also feed sweet potato vines to pigs to save feed and kill two birds with one stone.

4. Drug control

If it is large-scale planting people will use drugs to control prosperity, so as to achieve the effect of increasing production and income, the commonly used agents are paclobutrazol, dwarf and so on. If the nitrogen fertilizer of sweet potato is too high, in the case of high temperature and heavy rain, the effect of drug control is poor, so if we want to increase the yield of sweet potato, we should apply less nitrogen fertilizer and more potassium fertilizer.

The above is the introduction of sweet potato control time and methods, hope to help you, want to know more related knowledge, please follow us.