Sweet potato control time and skills, when to play the right time

The first growth control is the expansion period of sweet potato, the second is about 65-70 days after planting, and the third is about 85-90 days after planting. Generally, it can be controlled by raising vine, cutting vine or medicine, in which cutting vine can not only effectively control the growth of sweet potato vines, but also feed sweet potato vines to pigs, which is helpful to save feed cost.

First, the time of controlling the prosperity of sweet potatoes

1, the first time to control prosperity: in the first expansion period of sweet potato, the vine length is about 35-45cm, the potato vine has begun to hang down from the ridge, commonly known as "Xialiangzi", elegantly known as "two ridges like holding hands without holding hands", at this time is the sweet potato branching period, aboveground branches, underground potato blocks formed, so it is more critical.

2. The second time to control prosperity: generally, about 65-70 days after planting, it is entering the "rainy season", high temperature and humidity, and it is also the season of rapid growth of sweet potato stems and leaves, which is in the common period of sweet potato vines, but the expansion of potato pieces is slow, so we should pay attention to controlling prosperity at this time.

3. The third time to control prosperity: generally, about 85-90 days after planting, when the growth of stems and leaves of sweet potato reaches its peak, in order to prepare for the arrival of the second expansion period of sweet potato, it is also necessary to control prosperity in time, while in the second expansion period of sweet potato, the vine length is about 60-80cm, which is basically closed, and this is the golden period of sweet potato development, so we need to focus on controlling prosperity.

Second, the method of controlling the growth of sweet potato

1. Tito controls Wang

The main results are as follows: (1) generally, when the rattan length of sweet potato is 40-50cm, the effect of vine control is better, its main purpose is to prevent the growth of sweet potato rattan fibrous root, help to control the loss of nutrition, but also effectively prevent the overgrowth of sweet potato vine.

(2) only need to lift the sweet potato vine gently, but to avoid harming the stem and leaf, it is helpful to prevent the fibrous root from growing. If the vine is turned over to control the growth, the vine can be reversed, which is very easy to cause damage to the sweet potato stem and leaf. If the stem and leaf face the ground, it may also affect the photosynthesis of sweet potato, resulting in a reduction in yield.

2. Cutting vines to control prosperity

The main results are as follows: (1) 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. When the summer is high temperature and rainy, the stems and leaves of sweet potato vines grow faster, then sweet potato vines will be cut to feed pigs.

(2) it can not only effectively control the growth of sweet potato vines, but also feed sweet potato vines to pigs, which is helpful to save feed cost.

3. Drug control

If it is large-scale planting, drugs will be used to control prosperity, so as to achieve the effect of increasing production and income. the commonly used growth control agents are paclobutrazol and dwarf. if the nitrogen fertilizer of sweet potato is too high, in the high temperature and rainy season, 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 potash fertilizer.