Sweet potato cutting planting method

Early soil preparation: ridging according to topography in winter or early spring, appropriate amount of organic fertilizer, ammonium bicarbonate, calcium superphosphate and potassium sulfate can be applied per mu. Select potato varieties: choose potato nuggets that weigh 100-150 grams. Cut up and soak the seeds: soak the potato pieces in carbendazim solution. Sowing and plastic mulching: avoid frost damage. Breaking the membrane and releasing seedlings: the seedlings were broken artificially when they reached 3cm. Scientific seedling replenishment: replanting should be carried out where there is a lack of seedlings. Clear the trees in time: leave 2 strong seedlings in each tree, and cut off the rest.

First, prepare the land as soon as possible.

The main results are as follows: 1. The deep turning of 30cm in winter or early spring is beneficial to increase the ground temperature and water content, and the low temperature in winter and spring can be used to kill underground diseases and insect pests.

2. During this period, ridges can be made according to the north-south line or according to the topography, the ridge distance is 60cm, the ridge height is 20cm, and the ridge shape is generally high and fat, while the ridge is deep and narrow, which is not only convenient for drainage and drought prevention, but also can promote root expansion.

3. When ridging, the ridge soil should be kept loose and the ridge surface should be pulled and raked flat, and then organic fertilizer 4000kg-6000kg, ammonium carbonate 50kg, calcium superphosphate 50kg, potassium sulfate 20kg or plant ash 100kg can be applied per mu.

Second, selected potato species

Select the high quality varieties suitable for local planting, the size of the potato pieces should be uniform, and the potato pieces with a weight of 100g-150g are better, and then the potato chips with frost injury and diseased insects are removed, and the seed consumption per mu is 50kg.

Third, slicing and soaking seeds

1. Cut into pieces on a clear and windless morning, and then according to the characteristics of dense buds at the upper end and sparse buds at the lower end, cut the potato pieces smaller in the upper part and larger in the lower part, and each piece needs to retain 2-3 buds.

2. Put the cut potato pieces into the carbendazim solution and soak the seeds for 10-20 minutes. The general solution temperature should be 5 ℃ higher than the temperature at that time. After soaking the seeds, they are removed and dried for planting.

Fourth, sowing and plastic film mulching

1. After getting out of the cellar, seed potatoes should be sowed as soon as possible to avoid freezing injury. The seeds can be cut and soaked in the morning, and then sowed in the afternoon. Before sowing, a ditch with a width of 15cm and a depth of 5-6cm can be opened on the back of the ridge, and then watered through the ditch.

2. Wait until all the water is seeped, and then put the mother bud eye face south up in the ditch, according to the plant spacing of 25-30cm, the potato seeds will be deep into the soil for 1cm, and covered with soil 2cm, immediately after sowing, film mulching is needed, and the surrounding soil is pressed tightly.

5. Breaking the membrane and releasing seedlings

After 25 days of sowing, the buds on the sweet potato will be unearthed one after another, and then complete seedlings will emerge in 35 days. When the seedlings reach 3cm, the seedlings can be artificially broken to avoid burning the seedlings, and then sealed with soil at the broken membrane to prevent ventilation, cooling and moisture running.

VI. Scientific seedling replenishment

After the introduction of seedlings, the emergence rate should be checked in time, and the lack of seedlings should be replanted. When replanting, the strong potato seedlings should be dug out with a shovel from the edge of the direct seeding plot, and then transplanted to the lack of seedlings.

Seventh, clear the tree in time

The main results are as follows: 1. In order to avoid the expansion of the potato mother itself, promote the root to take root and form a melon block, so you can remove part of the soil around the potato mother after emergence, and then let the potato mother expose 1 prime 3, so that its root system can grow normally in the shallow soil layer.

2. This method is also called Qinggu. The suitable time for Qinggu is when the root system of sweet potato has been fully formed, and when the upper seedling grows to 15-20cm, clear the plant twice again. Most of the soil around the seed of sweet potato should be removed, causing the seed of potato to expose more than 2pm. When the plant is clear, each tree should retain 2 strong seedlings, and the rest can be cut off.

VIII. Field management

The main results are as follows: 1. When the daytime temperature is more than 30 ℃, the temperature under the plastic film can rise to 40 ℃, and the sweet potato has entered the same period of time, so the requirement of soil permeability is higher, so the plastic film should be removed in time.

2. The management during the period from film uncovering to harvest is the same as the traditional way of planting and cultivating sweet potato, mainly to protect the stems and leaves and not to turn the vines, but for the land where the growth is too prosperous and there are too many weeds, it is necessary to raise seedlings and remove weeds in time.

3, during the growth period, topdressing should not be too much, generally can be extra-root topdressing, per mu can be sprayed with 1% urea, or 0.5% potassium dihydrogen phosphate solution 50kg, while paying attention to insect control and waterlogging.