Sweet potato planting technology and management methods

Sweet potato planting technology from the seedbed nursery, adequate fertilizer, reasonable dense planting and other aspects of the management of the management of the rooting stage of slow seedling management, branching stage management, cracking irrigation fertilizer and so on.

One, sweet potato planting technology

1, seedbed nursery: sprouting seedlings is an important part of the whole anti-season cultivation, nursery time is appropriate early in mid-February to the seed potatoes, moved into the protected nursery beds nursery. Seedbed using double film protection, seed potatoes neatly arranged, covered with a layer of fine soil after a layer of film, and then arch cover a layer of film, in order to improve the ground temperature of the seedbed.

2, apply sufficient fertilizer: choose loamy soil choose sandy plots, early spring combined with ploughing mu 2-3 tons of farmyard manure, urea 15 kg, 20 kg of phosphate fertilizer.

3, reasonably dense planting: 3500-4000 plants per mu, spacing 33cm or so. When planting seedlings to remove the "old hard seedlings" and weak seedlings, choose the strong seedlings planted, planting the best size seedlings for grading, planted separately, so that their balanced growth, in order to prevent and control the sweet potato black class disease, available 50% of the metribuzin 1000 times liquid dip seedlings at the base of 2-3 inches, 10 minutes.

Two, sweet potato planting management methods

1, rooting and slowing down the management of the stage: rooting and slowing down the stage is from the planting of new roots to the beginning of the formation of tuberous roots, lasted about 1 month. Sweet potato planting should be timely checking seedlings to ensure that all seedlings, planting seedlings, such as in the case of drought, should be timely watering seedling water, in order to facilitate the rooting of the survival. Generally after planting, to water once, and then every 10-15 days plowing in order to loosen the soil, raise the temperature, eliminate weeds, timely spraying of new high fat film to promote the rapid growth of plants conducive to the formation of roots.

2, branching potato stage management: 30-40 days after planting, as the temperature rises, stem and leaf growth accelerated, the tuberous roots continue to form expansion should be timely to strengthen the management of water and fertilizer, such as in case of drought can be followed by water mu 5-8 pounds of urea, watering to be early plowing to loosen the soil and moisture conservation.

3, crack irrigation fertilizer: sweet potato into the tuber expansion period, the topsoil layer will appear cracks. At this time, per mu with water manure 750-1000 kg, 500 grams of potassium dihydrogen phosphate, mixed in manure, the morning or evening along the cracks irrigation, irrigation with the soil to fill the cracks, while spraying the ground fruit strong tilling anti-deformed fruit, cracked fruit, can increase yields by 20% -30%.

Growth habit of sweet potato

Sweet potato likes warmth, afraid of cold, not cold, the appropriate growth temperature of 22-30 ℃, the temperature below 15 ℃ stop growing. Suitable temperature can promote the plant to grow well in all growth periods, and ensure the number of root mass and expansion.

Sweet potato likes light, is a short day crop. Plant growth process on the high light energy requirements, is intolerant of shade crops, from the stem and leaf period of light energy time long growth period is long, the higher the photosynthetic efficiency, and vice versa will reduce the photosynthetic efficiency, affecting the growth of the plant. Daily sunshine time should be 8-10 hours, sufficient light can not only promote flowering, the formation of root mass, and good light can also make more nutrients accumulated to the tuberous roots, prompting the expansion of the root mass.

The plant growth process to meet the different growth periods on a variety of fertilizer nutrient needs, applying the right amount of nitrogen fertilizer can promote the growth of leaves and stems and branches to promote photosynthesis, but should not be too much, otherwise it will cause lignification of the root cells, affecting the number of root mass, serious overdose will not be knotted root mass.