Since the beginning of June, the planting of summer sweet potato in Huaibei of our province has gradually come to an end. In the field management period, field management of sweet potato should be strengthened. Seedlings fill the seedlings and sweet potatoes within a week to inspect seedlings to ensure seedlings. When making up the seedlings, strong seedlings should be used, and the water should be poured. After the survival, the eccentric fertilizer should be chased and the seedlings should be allowed to catch the big seedlings.
The cultivator and weed cultivator can destroy the surface crusts, loosen the soil, increase the permeability of the soil, and promote the rooting and seedling regeneration of the potato seedlings. Cut off the soil capillary after cultivating, so that the lower layer of soil water is not easy to rise along the capillary to the surface, reducing the evaporation of water. Therefore, the cultivator is conducive to drought protection while also removing weeds. The cultivator usually takes 2~3 times, the first time after replanting, the second time in the branching period, and the third time before mulching. It must be thoroughly smashed and simmered, and it should not be missed. Do not touch the potato seedlings. The third cultivator is also combined with adobe soil to restore the ridge shape. The adobe earth should be careful not to damage the yam, and do not put too much soil on the ridge surface, so as not to increase the thickness of the cover soil of the sweet potato roots, which is unfavorable to the growth of roots and the swelling of the roots.
Top dressing is due to the seedlings.
(1) The fattening of sweet-potato sweet potato group means that the main stem of sweet potato grows to about 35 centimeters, and the period of the base leaf axillary has occurred. In this period, based on the application of base fertilizer and seedlings, common or partial application of one-time available nitrogen fertilizer. Pu Shi uses 4 to 5 kg of urea per acre and applies it in two middle points. Partial application means less seedlings and weak seedlings.
(2) Foliar spray fertilizer is generally used in the late growth period of sweet potato, that is, 40 to 50 days before sweet potato harvest. 1 Potassium dihydrogen phosphate solution: 150-200 g potassium dihydrogen phosphate per acre, add 75-100 kg of water, spray after mixing. 2 sweet potato expansion agent per acre with 10 grams of sweet potato expansion, add water, 75 kg spray. 3 superphosphate solution per gram of superphosphate 2 ~ 3 kg, add water 75 ~ 100 kg, fully dissolved, filtered, sprayed with a sprayer, sunny after 4 pm after spraying better.
Drought resistance and long-term drought should be promptly filled with water, especially at the height of the root swelling. When watering, the water depth should reach 1/3 to 1/2 of the ridge height, and irrigation can also be applied across the ridges. Sweet potato is not resistant to waterlogging and should be drained in time according to the status of stagnant water in the field.
The cranberries are to be lifted gently from the ground, and the adventitious roots are broken and placed in the original place. It does not have to be done under normal conditions. However, when the leaves are soaked in the rain and the potato vines are deposited in the soil, the vines have the effect of ventilating and dispersing moisture and facilitating drainage. For fertilizer-rich and over-exploited fields, vines can pull off adventitious roots, reduce the ability to absorb fertilizer and water, and curb leggy. In the event of an impractical trend, measures such as taking care of the heart, lifting vines, cutting off old leaves, etc., all have certain inhibitory effects. In many parts of the country, the growth of sweet potatoes has been followed by the habit of turning vines. After a large number of tests have proved that the more turns, the greater the reduction in output, therefore, in addition to the previous period to facilitate fertilization, cultivator, soil cultivation, trenching and other field management measures must be turned, generally do not turn vine.
The cultivator and weed cultivator can destroy the surface crusts, loosen the soil, increase the permeability of the soil, and promote the rooting and seedling regeneration of the potato seedlings. Cut off the soil capillary after cultivating, so that the lower layer of soil water is not easy to rise along the capillary to the surface, reducing the evaporation of water. Therefore, the cultivator is conducive to drought protection while also removing weeds. The cultivator usually takes 2~3 times, the first time after replanting, the second time in the branching period, and the third time before mulching. It must be thoroughly smashed and simmered, and it should not be missed. Do not touch the potato seedlings. The third cultivator is also combined with adobe soil to restore the ridge shape. The adobe earth should be careful not to damage the yam, and do not put too much soil on the ridge surface, so as not to increase the thickness of the cover soil of the sweet potato roots, which is unfavorable to the growth of roots and the swelling of the roots.
Top dressing is due to the seedlings.
(1) The fattening of sweet-potato sweet potato group means that the main stem of sweet potato grows to about 35 centimeters, and the period of the base leaf axillary has occurred. In this period, based on the application of base fertilizer and seedlings, common or partial application of one-time available nitrogen fertilizer. Pu Shi uses 4 to 5 kg of urea per acre and applies it in two middle points. Partial application means less seedlings and weak seedlings.
(2) Foliar spray fertilizer is generally used in the late growth period of sweet potato, that is, 40 to 50 days before sweet potato harvest. 1 Potassium dihydrogen phosphate solution: 150-200 g potassium dihydrogen phosphate per acre, add 75-100 kg of water, spray after mixing. 2 sweet potato expansion agent per acre with 10 grams of sweet potato expansion, add water, 75 kg spray. 3 superphosphate solution per gram of superphosphate 2 ~ 3 kg, add water 75 ~ 100 kg, fully dissolved, filtered, sprayed with a sprayer, sunny after 4 pm after spraying better.
Drought resistance and long-term drought should be promptly filled with water, especially at the height of the root swelling. When watering, the water depth should reach 1/3 to 1/2 of the ridge height, and irrigation can also be applied across the ridges. Sweet potato is not resistant to waterlogging and should be drained in time according to the status of stagnant water in the field.
The cranberries are to be lifted gently from the ground, and the adventitious roots are broken and placed in the original place. It does not have to be done under normal conditions. However, when the leaves are soaked in the rain and the potato vines are deposited in the soil, the vines have the effect of ventilating and dispersing moisture and facilitating drainage. For fertilizer-rich and over-exploited fields, vines can pull off adventitious roots, reduce the ability to absorb fertilizer and water, and curb leggy. In the event of an impractical trend, measures such as taking care of the heart, lifting vines, cutting off old leaves, etc., all have certain inhibitory effects. In many parts of the country, the growth of sweet potatoes has been followed by the habit of turning vines. After a large number of tests have proved that the more turns, the greater the reduction in output, therefore, in addition to the previous period to facilitate fertilization, cultivator, soil cultivation, trenching and other field management measures must be turned, generally do not turn vine.
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