1: How to determine the breeding period?
Rice seedlings were inoculated with dry and inoculated seedlings and seedlings were planted after the temperature had stably passed 5°C to 6°C (the temperature was increased to 12°C or more after covering the mulch film or greenhouse film). Heilongjiang Province was generally planted in mid-and late April, and no seeds were planted in May. The best sowing date is April 15-25. It is also possible to determine the sowing date by counting the number of days during the sowing period. The Chinese herbs should be planted 30-35 days before sowing and the big seedlings sown 35-40 days before sowing.
2: How to determine the amount of rice seedlings?
The total amount of seedlings planted in Putian is generally not suitable for dense planting. Only under the rare planting conditions, the corresponding light can be ensured in order to cultivate the strong and strong. The specific amount of sowing should be determined by the number of seedling leaves and the method of transplanting (artificial sowing or mechanical sowing) to determine if the individual's growth is affected by transplanting. General sowing seedlings in dry nursery, sowing seeds per square meter (6 plates) (germination rate above 90%) 250-300 grams. Hand-planted dry nursery seedlings broadcast 200-250 grams per square meter (6 plates), and planted in broadcast medium, 95-120 grams per plant, not too much or too little. , return to green slow, sub-cooked late, too few leaked broadcast rate increased, pay nursery work. Seedlings or seedlings are transplanted and transplanted. Seeding capacity is 300 g/m2.
3: There are several common ways to raise seedlings? Which way is advocated?
Rice seedlings include plastic film insulation and dry seedlings, such as dry land, Xuan field, grass field, Dajitai and Habitat dry seedlings, plastic film insulation and dry seedlings, plastic film insulation and dry seedlings can be divided into porous and non-porous seedlings. According to the plastic film coverage can be divided into greenhouses, sheds, small sheds, seedlings, according to the number of seedbed water can be divided into dry nursery and wet nursery. At present, the main promotion is in middle and large sheds.
4: What kind of seedlings are considered strong? What is the key to nurturing strong athletes?
1, the appearance of strong growth performance. 2. Physiologically, metabolic coordination and active life function. 3, suitable age. The performance of Zhuang Sheng after sowing is: 1. Strong hair root. 2, strong resistance. 3, turn green to survive fast. 4, high productivity. To nurture strong and rare, broadcast is the key. At present, in some areas, there is insufficient understanding of dilute-seeding, high seeding rate, thin and weak seedlings, low seedling establishment rate, and large seedlings after sowing. Therefore, we must emphasize the appropriate broadcast.
5: What are the advantages of opening and closing dry nursery?
1. The space inside the seedbed is large, the light receiving area is large, the absorption of heat is large, the heat efficiency is high, the temperature is increased quickly, the emergence is early, the seedlings are plentiful, and the rate of larvae is high. 2, seedlings neat, strong growth potential, seedlings of good quality. 3, easy to operate, easy to manage. 4, low cost and high efficiency.
6: What are the main technical aspects of opening and closing dry nursery?
1. The choice of breeding place should use garden fields, dry fields, vegetable fields, highland terraces or Honda's Gaozao. There should be no accumulation of water. The terrain should not be low, and the salt and alkali should be light. 2, dry and dry, dry bed. 3, spread nutrition soil. 4. The seedbed is well treated before sowing. 5, appropriate amount of dilute sowing. 6, spray herbicide. 7, cover the film. 8, scaffolding, cover agricultural film. 9, Miaotian management.
7: What is a floppy disk? What are the advantages?
The floppy disk breeding is a kind of dry seedling technology developed on the basis of wide-bed open-closed dry seedlings in recent years. Its outstanding feature is the use of floppy disk seedlings. The cultivated seedlings are neat, the width and width of the leaves are uniform, and the thickness is uniform, standardized and standardized. Mechanical transplanting is more suitable for manual transplanting. Because this way, the seedling bed soil is a standardized nutrient soil formulated by acidification or adding a land conditioner, which creates a good environmental condition for seedling growth. Therefore, the seedlings grow robustly and their roots develop well. Even if they encounter different degrees of low-temperature sunshine or high-temperature droughts, strong winds and other unfavorable conditions during seedling raising, the seedlings grow normally. Rough blight and bacterial wilt are rare. welcome. The benefits of floppy disk breeding: 1, seedlings of good quality, not easy to disease. 2. It can greatly increase the proportion of Honda. 3. It can promote the development of intensive and specialized education. 4, easy to manage. 5, reduce the cost of childbirth.
8: What are the main technical aspects of throwing out children?
1. The throwing tray is a specially made plastic tray. The tray can grow the seedlings of the clod, and the soil in the nursery bed is not easy to disintegrate and it is easy to transport. 2. Tossing seedlings: The seedlings cultivated in each seedling trough are empty, so don't scoop too much at the time of seeding. Otherwise, the seeding amount will be large and it will be difficult to grow into strong seedlings. Generally, 4-5 capsules per trough are sufficient. . 3. If you do not use seedling trays, it is best to force the seedlings to be cut into tofu blocks on the seedbed before throwing in order to throw them out.
9: What field management issues should be noted before the emergence of dry nursery?
1. Temperature management: In order to guarantee early germination, early emergence of seedlings, out of Qimiao, dry seedlings to do post-emergence insulation work. Measure is to cover the agricultural film, and the damaged plastic film will be repaired in time. The dust and snow on the agricultural film are often destroyed to increase the light transmittance of the agricultural film and increase the temperature. When there is a cold wave, cover the grass and other insulation on the film. 2. Moisture management: bed soil moisture deficiency, inequality, will affect the emergence and Qimiao, so the bed soil moisture status of the seedbed should always be checked and found that the topsoil dry white, it should be promptly replenishment. 3. Prevention of rodent pests and insect pests: The method of rodent control is the application of zinc phosphide on the bed, that is, 25 kg of 05 kg of zinc phosphide plus bait (corn, sorghum, etc.), spread on the bed after being mixed, and used to prevent 5%. Phosphorus 05 kg plus 50 kg of cooked high-phosphorus, mixed and sprinkled on the bed, sprinkle a small amount of each bed can receive control effect. When the seedlings were planted with needles and green heads, the mulch film covering the seedlings was timely peeled off, and the film was exposed to high-temperature burns.
10: How should ventilation seedlings be used after dry seedlings?
After the emergence of the seedlings to unmask the membranes, the technical requirements of this stage are relatively strict and it is a critical period for the success or failure of drought and seedling development. The center of management is to ensure the stable growth of the seedlings, both to prevent cold hazards and to prevent high temperatures.
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