Rice nursery and seedling period management methods

Rice management during the seedling period is very important, how to manage the seedling period of rice? Here I introduce you to rice seedling and seedling period management methods, I hope to help you.

Rice nursery and seedling period management methods

Seed treatment in order to improve the germination rate of rice, before sowing should be sunshine seeds, and then use 100 grams (25% imidacloprid) 2 ml or the evil line of clear (16% imidacloprid to kill fenitrothion) 15 grams, add 5 to 6 kilograms of water to soak 5-6 kilograms of rice seeds, each 5-6 kilograms of water and then add 10% imidacloprid WP, soak for 72 hours, the day soak night dew! The seeds are then germinated and sown, which can effectively prevent and control malignant seedling disease, dry tip nematode disease and pre-emergence gray fly.

Moisture management dry seedlings in the uncovering of the film should be timely watering a thorough water, to prevent dead seedlings; 3 leaves before the period to keep seedlings moist, promote the rapid growth of the root system and leaves; 3 leaves after the period of water control drought management is mainly to do not roll the leaves do not watering, rainy days to do the rain stops the field dry. Water seedlings do not keep deep water layer for a long time.

Fertilizer transport dry nursery seedlings need relatively little fertilizer, in the case of adequate seedbed fertilization, the seedling period generally do not need to apply fertilizer, but fertilization is not good, the bottom fertilizer is not enough, the emergence of yellow rice paddies, we must promptly sprinkle fast-acting nitrogen fertilizer, 10 to 20 kg of urea per acre, and watering in a timely manner in order to prevent fertilizer damage. Water nursery seedlings require relatively large amounts of fertilizer during the seedling period, the amount of fertilizer is more, requiring a small number of times evenly spread, to prevent seedling burning.

Disease and pest control with 48% chlorpyrifos emulsifiable concentrate 150 ml per mu and 35% phoxim microencapsulated granules 1 kg per mu before the fall, and then 100 grams of 40% phoxim emulsifiable concentrate mixed with bait in the evening sprinkled around the rice field, to prevent and control underground pests. After seedling control, choose one of the following 2 formulas per mu of seedling field and add 50-75 kilograms of water to spray. Seedling field weeding can be in the 2 leaf 1 heart stage to 4 leaf stage, per mu with benzyl? Dichloro (32% Bensulfuron? Dichloroquinolinic acid) 30 to 40 grams, add 30 to 40 kg of water spray. Drain the water before applying the medicine, and 1 to 2 days after the medicine, 2 to 5 centimeters of water layer, and keep it for 5 to 7 days. Control of diseases and insects can be used per mu with 25% imidacloprid wettable powder 40 grams plus fungitoxin 250 ml or crop clean (50% chlorobromoisocyanuric acid) 30 grams plus Sanfushun (6% prothioimidazole?) 100 grams. Polymyxin) 100 grams, add 50 to 75 kilograms of water to spray, 5 to 7 days once.

Rice transplantation management

First, fine-tuning the field

Early crop □ the field, should strive to plow over the sun. Late crop □ field, we should seize the time to rush plowing and planting. Generally a plowing, a spinning, a flat

operations, so that the field height is less than 3 centimeters or so, to achieve flat, deep, loose, soft requirements for rice transplanted early live and promote the roots, tillers

provide good conditions.

Second, full base fertilizer

Ploughing and tilling before the ground should be full of base fertilizer, base fertilizer should be organic fertilizer, and appropriate with fast-acting nitrogen, phosphorus, potassium fertilizer. Ammonium bicarbonate as a base fertilizer, the most

Good before plowing under, according to the test, its fertilizer efficiency can reach 58%. The amount of nitrogen in the base fertilizer, hybrid indica rice should account for the total amount of nitrogen applied 3O

% ~ 4O%, 4O% of the round-grained rice, a single late rice is 4O% 5O%. In addition, such as the serious shortage of potassium fields, per mu can be applied 2OOml of raw

material potassium fertilizer, in order to improve the soil's supply of potassium.

Third, the appropriate basic seedling

General conventional japonica rice in the seedling hand-planted in the productive side of the insertion of l.8-20,000 holes per mu, the basic tiller seedlings 5-6 million. Large-scale production of about 20,000 holes per mu

, the basic stem tiller seedlings 60,000-80,000. In general, the large field of about 23,000 per mu, the basic stem tiller seedlings about 80,000. The small seedlings can be planted on the basis of the middle seedlings

appropriate down some, large seedlings can be planted appropriately increased some. The fertilizer bed dry cultivation planting, seedling planting, productive party per mu planting 4-5 million basic stem tiller seedlings, large-scale production per mu planting 6-7 million basic stem tiller seedlings.

Fourth, reasonable spacing

Dry seedling planting after? The first thing you need to do is to make sure that you have a good understanding of what you are doing. Strong, it is appropriate to take the expansion of rows (distance) shrinking plant (distance) planting, in order to increase the ventilation and light between rows, delay the time of sealing rows, coordinating groups and individual conflicts, is conducive to the formation of strong stalks, enhance the resistance to collapse, and improve the rate of tillers into spikes. Hybrid rice row spacing 3O-33 centimeters, plant spacing lO-l3 centimeters. Japonica rice yield party row spacing 28 centimeters or more, large-scale production on the row spacing of 26-28 centimeters, plant spacing are lO-l3 centimeters. Soil fertility is low, poor production conditions, row spacing can be appropriately reduced, plant spacing remains unchanged.

Fifth, shallow water shallow plug

planting to do shallow water shallow plug. Because the surface soil nutrient-rich, high ground temperature, good ventilation, so shallow plugging is conducive to the development of the root system and the absorption of nutrients, thereby promoting tillering. If the seedlings are planted too deep, it is easy to make the tiller section in poor ventilation, poor nutritional conditions, resulting in delayed tillering. General hand-planting depth to control within 3 centimeters is appropriate. Rice seedling field, to adhere to the wet casting, can not have water layer, not to mention the deep water layer. In order to improve the quality of casting, to ensure that the casting is uniform, in the casting to do: First, to throw back and forth more than two times. The second is to throw after the 2-meter throw width to clean up the sidewalk. Third, do a good job of leveling the lack of water, in order to prevent the throw after the wind and rain and drift seedlings, resulting in seedlings on one side.

Rice seedling management

1. Temperature control: rice in the process of growth, generally high temperature long leaves, low temperature long roots, so the temperature control should adhere to the measures to promote the growth of roots, strict temperature control. After sowing to 1 leaf dew tip, the temperature is mainly heat preservation. The temperature in the shed is 28-30 ℃, the optimal temperature is 25-28 ℃, the 2-leaf period to maintain 25 ℃, the 3-leaf period to maintain 20-22 ℃, the lowest temperature is not less than 10 ℃. In April 19 or so seedling farmers, due to the drop in temperature after sowing, the temperature in 8-10 ℃, night temperature is low, should be taken inside the shed to open the electric light or point to burn rice husk and other measures to increase the temperature, small shed seedling should be outside the shed covered with straw or cold-proof quilt and other measures to increase the temperature to ensure that to achieve the minimum temperature required for the age of each leaf of the seedling indicators.

2. Control of moisture: in the case of watering through the bottom of the water, in principle, in the 2 leaves before try not to water, after watering the seedbed water to do three look: a look at the morning and evening tip of the leaf with or without dewdrops; look at the high temperature at noon when the new unfolding of the leaves are curled; three look at the surface of the soil in the seedbed whether the whitening. If the morning and evening leaves do not spit water, the new unfolding leaves curled at noon, the surface of the bed soil white, the morning sun temperature should be watered at a time watering full, watering through, minimize the number of times watering, not to mention the cold water irrigation beds, which will lead to cold water stagnation, affecting the growth and development of rice seedlings. Try to do dry breeding strong seedlings, water long seedling, dry long root, in order to seedling disk root is good, must control the seedbed moisture. Seedlings can only promote root development in a dry state, especially in the 2-3 days before transplanting seedlings, it is best not to water so that the seedling roots remain dry.

3, do a good job of ventilation management: in the rice seedlings green, we have to remove the film, preferably in the morning or at night to reveal the film, the temperature difference between inside and outside the shed is small, seedlings adapt to the new environment fast, if the midday temperature is high when revealing the film, on the ground part of the seedling water transpiration fast, the root absorbs slow, easy to cause physiological water loss in the seedling. After uncovering the film can be small ventilation, according to the temperature of the shed thermometer display, ventilation to reach the minimum temperature limit of the age of each leaf, to close the shed in a timely manner. With the growth of leaf age, ventilation refining time is extended accordingly, by its 2.5 leaf period, the temperature shall not exceed 25 ℃, higher than 25 ℃, ventilation cooling to prevent the phenomenon of early spike. After the 3-leaf period gradually large ventilation, the temperature inside and outside the shed is close to the same, if there is no frost at night, there is no need to cover the film, waiting for seedlings.

4. Weeding. When the pre-closed weed effect is not good, there are still a lot of weeds can be used in the seedlings before and after the 2.5-leaf period to kill barnyard grass, fast kill barnyard or Chijin, etc., if the broadleaf weeds are more can be used with the use of benadryl.

5. Disease prevention. In the seedling 1.5-2.5 leaf period spraying Rui Miao Qing Shui agent, 1 ml per square meter spray; or the application of Liku Kexing 1 ml per square meter spray, can effectively prevent and control seedling blight and green blight disease. 5-7 days before transplanting seedlings sprayed with oxolinic acid to prevent leaf fly, and sprayed with Fuji I or tricyclazole to prevent seedling blight.

Rice seedling seedling agent use and precautions

Rice seedling seedling agent is a set of successful development of our country? It is a good way to improve the quality of the soil and the quality of the soil. The first is to make sure that you have a good understanding of the situation and the way in which it is handled. The rice planting agent is a successful combination of fertilizer, acid regulating, and fertilizing. The first is to make sure that the rice is not too heavy and that it is not too heavy. Bactericidal? Fertilizing? chemical control? Four functions in one of the strong rice-planting agent, it is suitable for the application of the bed soil ph value of 7.2 or less soil, can greatly simplify the dry rice-planting operation procedures, and the rate of rice-planting is high. The seedlings produced have broad leaves, thick green color, short and healthy seedlings, many tillers and developed root system. When used, in addition to the conventional measures (such as making seedbed, sowing, watering, management, etc.) seedling, but also can be earlier than the conventional method of sowing 2-3 days, and the film temperature below 30 ℃ can not be refining, but to increase the amount of bed soil watering 5%

1, the use of methods: (1) dry nursery seedlings: each bag (1.25 kg) of strong seedling agent plus 7 kg of sifted dry land dry soil, after sufficiently mixed evenly, evenly sprinkled on the turning of the soil, and then the dry soil, and then the dry soil, and then the dry soil. After, evenly sprinkled in the harrowing leveled 10 square meters seedbed (for 1-2 acres of field planting), with a rake to scratch well, mixed in 2 cm deep table soil, and then watered sowing. (2) throw seedling plastic tray seedling? Each bag plus prepared bed soil 80-120 kilograms, fully mixed and formulated into a nutrient soil, loaded into 40-60 seedling tray (for 1-1.5 acres of rice paddies), and then watered and sown (can also be loaded with soil, set the plate, sowing, cover the seeds, and then watered and covered with film).

2, the use of precautions: (1) a variety of seedling methods, can not be mixed with a strong seedling agent nutrient soil mix or cover the seeds. (2) The preparation of nutrient soil must be mixed evenly. (3) This agent does not contain herbicide, so weeding must be treated separately. (4) In the case of fertilizer removal in the late stage of seedling cultivation, appropriate amount of nitrogen fertilizer will be applied to ensure the normal growth of seedlings. In addition, this strong seedling agent is also applicable to corn, vegetables, tobacco and other dryland crops on the strong seedling cultivation, the effect is excellent, the specific use of concentration is not known, it is recommended to halve the use.

Rice nursery period in the cold wave defense method

First, seize the time to seed replenishment. Has not been sown in large areas of the place, must seize the current temperature rebound a good opportunity to seize the time to sow; occur rotten seed rotten seedling dead place, depending on the degree of damage to seize the time to replenish the seeding. Especially machine transplanted seedlings, rotten seed rotten dead seedlings serious seedbed, can not meet the requirements of mechanical transplanting seedlings, to timely replenishment of seedling replenishment.

Second, standardize the management of mulching. After the temperature stabilization, the principle of gradual refinement should be carried out. If the weather is cold and rainy again, the arch film should be covered tightly. The seedbed is not uncovered, do not rush to uncover the film refining seedlings. Wait for the temperature to stabilize back to about 13 ℃, choose a sunny day near noon time to start uncovering the two ends, cover the film before 4:00 p.m., and gradually refine the seedlings to adapt to the environment. When the temperature exceeds 18 ℃, the temperature inside the membrane will exceed 35 ℃, it is necessary to fully uncover the membrane to avoid high temperature burning seedlings, to be covered again after the temperature drops.

Third, scientific fertilization and water management. After the temperature stabilization and seedling growth is normal, the seedling growth deviation, should take a small amount of multi-meal approach to separate fertilizer, in order to enhance the leaf and root function. For seedbeds that have uncovered the film, should seize the time when the temperature begins to rise, reasonable fertilizer, promote the growth of strong seedlings, careful management of the stock of seedlings. For dry seedling beds, leaf age in 3 leaves or so, you can use 2 kg of farmyard fertilizer to 15 kg of water, plus urea 2 two fertilizer. For wet nursery seedling field, seize the sunny day to dry the compartment surface, promote the growth of weak seedlings. If you need to chase fertilizer, you can take the morning drainage sun field, shallow irrigation in the afternoon to chase fertilizer, through ? Keeping warm with water? The first time I saw it, it was a very good thing that it was a very good thing. Fertilizer to promote growth? The method of promoting seedling growth.

Fourth, strengthen the pest control. Dry seedling should prevent the seedbed ground water, keep the soil moderately dry; water seedling should try to ensure the stability of the temperature in the membrane. If there is a blight and green blight occurs, immediately with 42% of a net or 35% of a net of blight wettable powder, in the seedlings a leaf a heart, 40 grams per bag of water 100?120 kilograms of water poured on the seedbed for prevention and control.

On the seedbed of weak seedlings, where available, in the spirit of sterilization and physiological regulation of the principle of dual role, mu choose? Green Heng? 5 grams of oxacillin plus phytolon?1.6% aminopyralid?10 milliliters or Zhongwei?30% ethylicin?8 milliliters plus phytolon?1.6% aminopyralid?10 milliliters of water to 15 kilograms of manually foliar uniform spray to achieve the preservation of seedlings to promote growth; in the seedling after the normal growth of fertilizer in a timely manner, and at the same time pay attention to the prevention and control of one generation of borers, aphids, rice thrips and other insect pests.