A few days ago, ho jia, director of the agricultural technology station of the south gang county agricultural department, arrived in the villages of the two villages to guide villagers in planting spring potatoes. In response to a question from the villagers, ho jia said that the membrane was growing spring potatoes, which was simple and would soon be springing, and it would take time。
Spring potato membrane cultivation, usually in the first half of february, can take place about 15 days earlier if a small bow shed is used。
Soil selection: it is appropriate to choose land level, drought-fed, flood-drained, sandy, sandy, sandy soil or land blocks. If the soil is adhesive, it should be bred high, preferably with organic fertilisation in deep tillage, which is appropriate for about 30 cm。
Fertilisation: potatoes require the most potassium fattening, less nitrogen fattening, less phosphorus fattening, and absorb 10:5:2. Fertilizers are applied primarily on the basis of base fat, supported by the pursuit of fat. The application of membrane cover is subject to a one-time application of base fattening, which should be 3000 kg per acre per farmer and 60 kg of compound fattening per acre in combination with a relatively poor increase in nitrogen fertilizer in soil。
(b) ground-dwelling: 3 cm - 40 cm before winter to eliminate weeds and winter pests. Using single-line planting, the ground is 80 cm wide, 17 cm - 18 cm high and 30 cm wide。
Varieties are selected for early growth, early potatoes, high-yielding and high-quality medium- and long-pre-literate varieties such as fiuria, kato 117, mira, potato 2 and dam department 10。
Potato processing: first, we have to disinfect the pieces and remove the cassava. The size of the slices shall be evenly balanced, with each sprout having a 30-50 gram size, cutting it in half from the end of the stem with a knife, then cutting it from the end to one sprout with a sprout with a knife, and cutting it with a stubble of one sprout of 72 per cent of a kilogram of masonry powder of 0. 03 kg, 70 per cent of methyl tobuzin (or more than 50 per cent of the fungus), or placing it in the outdoor shade to dry the cut, so as to heal the knife and prevent decay。
Slices are to be sterilized. Scissor disinfection can be purified with a blade and plate with a cyanide, circulosis, with 75 per cent of alcohol or open water. In the case of late-delayed varieties that need to be sprung, the leaching time for leaching at 0. 3 to 0. 5 mg per kg of potato is 1 to 2 days before seeding。
Before sowing, the chips are graded by size and the depth of seeding is 10-12 cm, depending on the sandy state of the soil, with a gap of 40-50 cm between the lines of the two rows, watering the gutter at a distance of 25 cm, sprouts upwards into the earth, and two rows of blocks are placed in triangles, spreading between 4,500 and 5,000 cm per acre, spreading the dust behind them. The soil is then covered by a membrane to prevent weeds from growing, with 150 grams of water per acre。
(b) fragmentation in due course: the potato membrane should be covered with a suitable demoliage, the premature seedlings of the demural membrane are prone to freezing and the dim membrane is easily roasted and hot. The membrane is usually broken in time after the terminal frost, and the seedlings are lifted and then placed on soil to seal the mouth of the membranes in order to protect them。
(b) cultivation of land by china: weeding by china helps to preserve the soil, increases the temperature of the land and combines it with soil cultivation. This is another important link in the high yield of spring potatoes, which can decompress the cassava layer so as not to let the tubers out of the ground green. In general, three times are carried out by defiling the seedlings when they grow to four to five leaves (ten centimetres high), the first is cultivated soil, which is 4 cm - 5 cm thick; the second is cultivated soil, which is 8 cm - 10 cm thick; and the third before the plant is sealed, which is 10 cm - 15 cm thick。
(c) fertilizers: spring potatoes are grown with a "pre-stimulant back-control" approach, which should be followed up one or two times on the basis of the application of base-based fertilizer, mainly with fast nitrogen. The first took place at the onset of the seedlings and combined with the application of 10 kg of nhk compound fertilizer per acre, or 7. 5 kg of urea, or 30 kg-40 kg of hydrocarbon. The second took place in the early stages of either flowering or the expansion of the chips, following a long-term combination of planting, watering and cultivation of 15 - 20 kg of complex npk fertilizer per acre. Upon entering the flowering period, external fatting should be performed in a timely manner, using 0. 3 per cent urea and 0. 4 per cent potassium phosphate. The seal will minimize fieldwork so as not to touch the blades and plant the plant。
Water management: potatoes are drought- and flood-resistant and water should be watered in a timely manner, as required. Early spring temperatures are low and water is not watered, as appropriate, in order to be used for farming purposes, and when temperatures rise, soil should be kept humid. Water is drained in time after the rain. Water is stopped 10 days before the harvest, which facilitates the storage of potatoes or seed。
Controlled masters: like potato seedlings, they can be regulated by deep tillage and water control before sealing off. Leaf spray can also be carried out using potato magnesium or 50-100 ppm polypolymer, or 16 ppm condensant, with effective control of the length。
