In view of the short growing season of summer sweet potato, the shortage of agricultural activity, and the lack of seedlings, the following complementary technical measures should be highlighted:
(1) Accumulation of early frost and early planting is an important measure to strive for how long the summer sweet potato leaves will grow, and then make full use of the heat and light energy resources in the high-temperature period to achieve high yields. Planting one day each morning can increase the effective accumulated temperature by more than 10°C, and the effective temperature per degree can increase about 45 kg of fresh potatoes per hectare. On June 20, 29902.5 kilograms of fresh potatoes were planted per hectare, and 26,508 kilograms of fresh potatoes per hectare were planted on June 30. The average daily fresh potato 339.5 kg. We must strive to maintain good management of the nursery as soon as possible so as to prepare the source of the seedlings, so that we can cut the ridges and cut off the ridges and plant them.
(II) According to the trial of increasing grain growth, it is possible to produce 150--200 kg of fresh potatoes per 500 kg of soil manure applied, and to increase the production of fresh potatoes by 10 kg to 15 kg for each additional kg of standard nitrogen fertilizer applied. Every kilogram of ash added can increase 2 kilograms of fresh potatoes. Fertilization to deepen the ditch to concentrate, in addition to basal fertilizer can be more than a part of the shop, the rest of the fertilizer (including nitrogen, phosphorus, potassium), should be ditching 6.7 - 10 cm deep, concentrated package filling application.
(3) Promoting early delivery with strong seedlings According to the experimental planting of potato seedlings, the yield of fresh potatoes was increased by 4,500--6,000 kilograms per hectare compared with the planted warm seedlings and other potato seedlings, and the yield increased by 18.2%--24.6%. Therefore, it is an important guarantee for the summer sweet potato to achieve high yield. At the same time, we must improve the quality of planting and ensure that the top leaves do not dry out. When planting, in addition to selecting the fully robust heads of the vines and accompanying the cultivars, it is imperative that the culms be planted in depth to plant the soil, magnify the nests, and then water the leaves. After the early morning long, early potato.
(D) To achieve high yields through scientific management First, we must insist on ridges and furrows, shallow ridges and ridges, and ridges and furrows; we can also use animal pull ploughs or three-tooth rakes, ridges, and ridges to manually pull grass or small ridges. It's shallow. Do not hurt the ridge does not hurt the roots, Taiwan spraying herbicides to cover the wheatgrass, more conducive to the growth of sweet potatoes. The second is to do a good job. When ridging, we must excavate the squat trench, intercepting ditch and potato ridge ditch, so that "three ditch" matching, to ensure the timely removal of water after the rain. Third, when it is dry, it must be watered, and it is usually watered twice. Compared with the control, the yield of fresh potatoes is increased by 37,500--6,000 kilograms per hectare, an increase of 21%--38%.
(1) Accumulation of early frost and early planting is an important measure to strive for how long the summer sweet potato leaves will grow, and then make full use of the heat and light energy resources in the high-temperature period to achieve high yields. Planting one day each morning can increase the effective accumulated temperature by more than 10°C, and the effective temperature per degree can increase about 45 kg of fresh potatoes per hectare. On June 20, 29902.5 kilograms of fresh potatoes were planted per hectare, and 26,508 kilograms of fresh potatoes per hectare were planted on June 30. The average daily fresh potato 339.5 kg. We must strive to maintain good management of the nursery as soon as possible so as to prepare the source of the seedlings, so that we can cut the ridges and cut off the ridges and plant them.
(II) According to the trial of increasing grain growth, it is possible to produce 150--200 kg of fresh potatoes per 500 kg of soil manure applied, and to increase the production of fresh potatoes by 10 kg to 15 kg for each additional kg of standard nitrogen fertilizer applied. Every kilogram of ash added can increase 2 kilograms of fresh potatoes. Fertilization to deepen the ditch to concentrate, in addition to basal fertilizer can be more than a part of the shop, the rest of the fertilizer (including nitrogen, phosphorus, potassium), should be ditching 6.7 - 10 cm deep, concentrated package filling application.
(3) Promoting early delivery with strong seedlings According to the experimental planting of potato seedlings, the yield of fresh potatoes was increased by 4,500--6,000 kilograms per hectare compared with the planted warm seedlings and other potato seedlings, and the yield increased by 18.2%--24.6%. Therefore, it is an important guarantee for the summer sweet potato to achieve high yield. At the same time, we must improve the quality of planting and ensure that the top leaves do not dry out. When planting, in addition to selecting the fully robust heads of the vines and accompanying the cultivars, it is imperative that the culms be planted in depth to plant the soil, magnify the nests, and then water the leaves. After the early morning long, early potato.
(D) To achieve high yields through scientific management First, we must insist on ridges and furrows, shallow ridges and ridges, and ridges and furrows; we can also use animal pull ploughs or three-tooth rakes, ridges, and ridges to manually pull grass or small ridges. It's shallow. Do not hurt the ridge does not hurt the roots, Taiwan spraying herbicides to cover the wheatgrass, more conducive to the growth of sweet potatoes. The second is to do a good job. When ridging, we must excavate the squat trench, intercepting ditch and potato ridge ditch, so that "three ditch" matching, to ensure the timely removal of water after the rain. Third, when it is dry, it must be watered, and it is usually watered twice. Compared with the control, the yield of fresh potatoes is increased by 37,500--6,000 kilograms per hectare, an increase of 21%--38%.
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