The yield of growing sweet potato will be higher if you don't turn over the vine.

I think we are all very familiar with sweet potatoes. I remember that when I was a little editor, I often went to the fields with my grandmother to grow sweet potatoes. With the increase of age, there were fewer and fewer opportunities to work in the fields, but sweet potatoes were often eaten.

The yield of growing sweet potato will be higher if you don't turn over the vine.

The experiment shows that the yield of sweet potato (sweet potato, sweet potato) without turning vines during the growth period is about 25% higher than that of rattan fields, and some of them are even as high as 30%. The main reasons for reducing the yield of sweet potato are as follows:

Damage the rattan leaves. Practice has proved that every time you turn the vine, 667 square meters will break the vine about 10 kilograms. If you turn the seedling after overcast and rain, it is easier to break the vine because of the sufficient moisture. In addition, after turning the vine, the leaves were artificially stacked, which affected the photosynthesis, resulting in serious yellowing, dead vines, shedding and other phenomena.

Affect the growth of underground potato cubes. After turning the vine, the roots twisted seriously, some of the small roots were broken, and even the whole plant was broken, resulting in few tubers, or even completely "rooting". According to the experimental statistics in 2005, in the experimental field of 0.13 hectares, the average caking per plant was 2.7 and the weight was 0.34 kg for those who had turned vines for 4 times, while for those who had not plucked vines, the average caking per plant was 3.8, the weight was 0.56 kg, and the yield was increased by 348 kg per 667 square meters.

Affect photosynthesis. Turning the vine also causes the stem and leaf to invert, disrupting the original ingenious natural distribution of crop leaves. It takes 5 to 7 days for the stem and leaf to return to normal growth, which will affect the growth of potato.

Resulting in a cluster of new branches, consuming a lot of nutrients. The lumbar root without turning the vine is many and deep, the root system absorbs more nutrients, the seedling vine is stout, the leaf is thick, the photosynthesis is good, the drought resistance is strong, and the waist root forms some tubers, which can promote the growth of sweet potato.

Planting time of sweet potato

Sweet potato seedlings need to be raised 2 months before transplanting, that is, spring potato seedlings begin in late January, autumn potato seedlings in mid-late June, and early winter potato seedlings in the first and middle of August. One-time seedling can be used, or it can be propagated in stages.

The planting season and time of the corresponding sweet potato seedlings:

Spring sweet potato: from late March to early April.

Autumn sweet potato: around the middle and late August.

Winter sweet potato: around the first and middle of October.

The suitable time for transplanting seedlings is in the middle of April, when the temperature in early spring is basically stable, and the suitable time for planting seedlings is when the ground temperature of 10 cm is more than 15 ℃ after the end of late frost, ploughing and tanning early last winter or the beginning of the year, and then set up ridges when planting. The border belt is wide 50cm. In the first and middle of April, the seedlings were cut and planted according to the emergence speed of the seedling bed, and the line horizontal insertion method was adopted to increase the number of potato seedlings into the soil to increase the number of tubers. There are 3000 trees per mu, which is about the distance from 33cm.

The growth period of sweet potato

The growth period of spring potato is 160-200 days, and that of summer potato is about 110-120 days. According to the growth characteristics of red spring in the field and its relationship with climatic conditions, it can be divided into three growth periods:

1. Prophase (from seedling planting to basin sealing). Spring potato lasts about 60-70 days, summer potato about 40 days. In this period, the growth of stems and leaves is slow, and the root system develops rapidly, which is mainly the period of growing fiber roots.

2. Middle stage (from sealing basin to the peak of stem and leaf growth). It takes about 50 days for spring potatoes and 30 days for summer potatoes. In this period, the root expands slowly, and the stem and leaf grow fast, which is mainly the period of growing stem and leaf.

3. In the later stage (from stem and leaf decline to harvest). Spring potato is after late August and summer potato is after early September. This period is the main period of root expansion.

Fertilization skills of planting sweet potato

First, looking at the seedling situation, the amount of fertilizer needed in the sweet potato branching period is very large, and a large amount of fertilizer needs to be applied to achieve the goal of strong plants, fast and stable growth, of course, more fertilizer is not blindly applied, and scientific fertilizers are needed according to the growth of sweet potatoes. a small amount of fertilizer can be applied to fields with good growth, while those who are not optimistic about growth need to apply more. If the amount of nitrogen applied to seedlings or tuber fertilizer is large, potato fertilizer can only be applied potash fertilizer.

Second, depending on the time, potato fertilizer can be applied about 45 days after planting sweet potato seedlings, mainly by topdressing potash fertilizer. At this time, the aboveground part of the ridge has been thrown off the ridge, and the potato block has been basically stereotyped. By applying fertilizer on one side of the ridge, it can not only supplement fertilizer for sweet potato, but also improve the aeration of the soil and contribute to the expansion of the potato block.

Third, look at the water, in the high-temperature and arid areas from July to August, it is necessary to apply sufficient nitrogen fertilizer to promote the ridges of stems and leaves before drought, and in the years with more autumn rain, it is necessary to appropriately reduce the number and times of topdressing and prevent the excessive growth of stems and leaves.

Fourth, looking at the soil quality, the sandy soil generally has good ventilation, the ability of fertilizer and water conservation is relatively poor, and the effect of soil fertilizer is short and easy to be lost. We must pay attention to the application of organic fertilizer to improve the soil, reduce the use of available fertilizer as much as possible, and appropriately increase the times of topdressing; clayey soil has poor ventilation, slow fertilizer decomposition and strong fertilizer conservation power, which can appropriately reduce the number of topdressing.

In order to increase the yield of sweet potato, there are many skills. Sweet potato without tumbling can indeed increase its yield, and reasonable fertilization can also increase its yield, but there are many areas that need to be paid attention to when applying fertilization. you can share your planting experience with others.