Simple sweet potato seedling raising method

1. Film-covered hotbed seedling raising method

The seedbed is six to seven meters long from east to west, one and a half to two meters wide, and zero deep .5 meters, the slightly higher seedbed in the middle is in the shape of a fish spine, and the soil is dug to build a wall. The north wall is 40 centimeters high, and the south wall is seven centimeters high, in the shape of a slope. An eighteen to twenty centimeter square ventilation ditch is left in the seedbed. , thirteen centimeters away from the wall, leave a vent at both ends of the bed wall and a ventilation ditch in the bed, place straw or branches horizontally in the ventilation ditch, fill the top with fermented heat, five parts of straw (short guillotine dipped in warm), One portion of horse manure (if using cow manure, the amount should be increased appropriately). After heating the pile, fill it into the bed and compact it firmly to a thickness of not less than 25 centimeters, and spread 10 centimeters of fertile bed soil on top.

2. Cold bed double-film seedling cultivation method

The so-called cold bed double-film seedling cultivation means that in addition to laying a layer of film on the slope or small arch of the seedbed before raising seedlings, A method of raising seedlings by covering the seedbed with a layer of film to increase the temperature of the seedbed. Fully fertilize the seedbed, prepare the ground, and make a seedbed two meters wide and infinitely long. When the seedlings emerge, remove the film, otherwise leave it unchanged. This generally allows seedlings to emerge three to five days earlier and increase the number of seedlings by 20 to 30 percent. This method is also suitable for use in plastic greenhouses, but two points should be noted when applying it.

① Scatter some crop straw on the seedbed and then cover it with a film. The surrounding area should not be compacted to prevent the lack of oxygen from rotting the seeds and affecting the emergence of the seedlings.

② When the seedlings are ready, remove the film in time to prevent burning of the buds. Pay attention to timely ventilation so that the temperature in the shed does not exceed 35 degrees. Among the above seedling raising methods, no matter which method is used, the key is It is necessary to ensure that the seedbed has a high-temperature environment, and pay attention to placing seed potatoes evenly and sparsely, and tempering the seedlings at low temperature to ensure early emergence and strong seedlings.

3. Sweet potato root seedling method

The sweet potato root seedling method is to transplant the potato roots harvested in autumn to the greenhouse or building balcony, and cultivate the sweet potato vines throughout the winter, leaving As sweet potato seedlings.

① After harvesting sweet potatoes in autumn, select healthy potato vine roots that are frost-free and disease-free. Leave two to three nodes on each upper vine root from the root upward. Remove the leaves and leave one centimeter of petiole for later use.

② Select a suitable seedling location based on the amount of sweet potato seedlings. Open a small ditch in the greenhouse with a distance of 80 centimeters between the ditch centers. Plant the sweet potato roots at a distance of 30 centimeters on both sides of the small ditch. Generally, Twelve plants per square meter. Sweet potato roots can be grown in pots on the balcony of the house in the same way as in greenhouse cultivation.

③ Above the ground of the greenhouse or indoor balcony, pull fifteen wires according to the spacing between sweet potato roots, and tie some plastic ropes or twine to the wires. One end of the rope is tied to the wire, and the other end is Tie to the sweet potato root. After the vines on the sweet potato roots sprout, choose to leave three strong buds on each plant, one bud corresponding to a rope, so that the vines can climb up the rope after the sweet potato roots sprout.

④ Newly grown sweet potato vines need to be manually wound onto a rope, usually once a day or two. When the sweet potato vines grow to three meters long, and about nine days before transplanting in the field, the vines can be harvested. Remove the leaves and keep the 1 cm long petioles. Cut them into two sections and plant them on the greenhouse floor or in a pot. Water them thoroughly to a depth of about six centimeters. After about two weeks, small buds will grow on the top of the vine and a certain root system will grow on the bottom, and then it can be transplanted to the field.

This method has the characteristics of large space utilization and large amount of seedlings, and a certain yield of sweet potatoes can be harvested from potato roots in spring. When using this method to raise seedlings, the temperature in the greenhouse or rooftop should be controlled at a suitable temperature and should not be too high or too low.