Rice nursery five points

In the spring after some areas of the South began to prepare for the nursery rice seedlings, so I organized the five points of rice nursery, the following detailed list for users to refer to.

The five points of rice seedling technology: rice seed treatment

In order to improve the germination rate of rice, seeds should be sunshine before sowing, and then use 100 grams (25% imidacloprid) 2 ml or bad line clear (16% imidacloprid to kill fenitrothoracic acid) 15 grams of water 5 to 6 kilograms of water to soak 5-6 kilograms of rice seeds, each 5-6 kilograms of water and then add 10 grams of 10% imidacloprid WP, soak for 72 hours, the day soak! Night dew, then germination and sowing, can effectively prevent and control malignant seedling disease, dry tip nematodes and pre-emergence gray fly.

Five points of rice seedling technology: to determine the seedling period

Rice insulation dry seedling, in the temperature stabilization through the 5 ℃ -6 ℃ after the start of seedling seeding (cover the film, shed membrane after the increase in temperature to more than 12 ℃), Heilongjiang Province, generally in mid-April, late April, do not sow the May seeding, the best sowing period of April 15 -25 days between. You can also count back the number of days to determine the seeding period, Chinese medicine in the seeding 30-35 days before seeding, large seedlings in the seeding 35-40 days before seeding.

Five points of rice seedling technology: seedling water management

If it is dry seedling should be unveiled in the film should be timely watering a thorough water, to prevent the dead seedling; in the rice seedling before the 3-leaf period to keep seedlings moist, promote the rapid growth of the root system and the leaves; 3-leaf period after the control of the water dry pipe is the main thing to do is not watering the leaf rolls, the rainy days to do the rain stops the field is dry. Rice seedlings do not keep deep water layer for a long time.

Five points of rice nursery technology: rice seedling fertilization

If the dry nursery seedlings need relatively little fertilizer during the seedling period, in the case of seedbed full fertilization, the seedling period generally do not need to apply fertilizer, but fertilization is not good, the bottom of the fertilizer is not enough, the emergence of the fall of yellow rice paddies, we should promptly sprinkle fast-acting nitrogen fertilizer, 10 to 20 kg of urea per acre, and watering in a timely manner to prevent fertilizer damage. Water nursery seedlings need 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.

Five points of rice nursery technology: pest control

In rice before sowing per mu with 48% chlorpyrifos emulsifiable concentrate 150 ml and 35% phoxim microencapsulated granules 1 kg, in the nursery land before the whole ground sprinkled; in the rice sowing and then 100 grams of 40% phoxim emulsifiable concentrate mixed with bait in the evening sprinkled in the rice field around the control of underground pests.

In the control of rice seedlings after the seedling flush with the disease, green blight, per mu of seedling field to choose one of the following two formulations, add 50 to 75 kg of water 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% propylthioimidazole?) 100 grams. Polymyxin) 100 grams, add 50 to 75 kilograms of water to spray, 5 to 7 days once.

Rice nursery technology

1, seedling field selection

Seedling field requires fertile soil, easy drainage and irrigation, no saline, to resolutely overcome the use of the ditch side of the river, roadside and poor fertility of the place for the habit of seedling field.

2, seedling field fertilization

The high and low fertility of the seedling field is the key to cultivate strong seedlings. The rice field should be mu applied farmyard fertilizer 5?7 square, 50 kg of rotted cake fertilizer tilling. 3?5 days before sowing mu net seedling bed application of ammonium or diammonium 15?20 kilograms, ammonium sulfate 30?40 kilograms, potassium sulfate 15?20 kilograms, zinc sulfate 2 kilograms. Can also mu with Wo Jing brand or Wo Li brand or strong Wang brand rice seedling formula fertilizer 30?40 kg scattered in the district, and then fine harrowing, so that the soil, fertilizer mixed evenly, after finishing the sowing.

3, seed disinfection

To improve the germination rate of the seeds, before sowing to sunshine 2?3 days, and then wind selection or mud and water selection, to achieve the seed full, strong germination. In order to eliminate the seed-carrying germs, seed disinfection should be carried out after seed selection, available 5 grams of bad enemy plus 5 pounds of water to soak 3 kg of seed immersed in 3?4 days or 25% of misonidazole 4000 times liquid or 80% of 402 fungicide 2,000?3,000 times liquid or 10% soaking seedling 4,000 times liquid soaked seed for 3?5 days to kill the white leaf blight, rice blast, malignant seedling disease, dry tip nematodes and other pathogens, fished out and sowed directly, can also be fished out to germinate, to the point that the seed is full, strong germination. It can also be fished out to germinate, to break the chest white sowing. For the white fragrant japonica varieties that are susceptible to malignant seedling disease, it is necessary to do a good job of seed dipping in order to effectively prevent malignant seedling disease. Field control is only a remedial measure, and the effect is not very satisfactory. Rice stripe leaf blight area, after dipping the seed, mu with 10% imidacloprid 20 grams plus a small amount of fine soil mixed with the seed after mixing, can prevent and control the vector rice fly.

4, sowing period sowing amount

Sowing early, late are not conducive to cultivate strong seedlings, sowing too early, seedling age aging, tiller lack of position, tillering after insertion of slow tiller, tiller less. Sowing too late, seedling tender and weak, inserted after the slow return to green, according to the existing varieties of our county, wheat stubble rice May 5?10 sowing is better, seedling age 35?40 days. Seedling area according to each insertion of a mu of paddy need net seedbed 45 square meters, need quality rice seed 2.5 kilograms. The seeding quantity of about 35 kilograms per acre of seedling field, the sowing period is slightly late, the sowing quantity is slightly increased.

5, sowing method

1?2 days before sowing, put water to soak the bed, fine ground, to achieve the mud rotten, surface flat. To reach the seedbed water seepage no mud when pursed flat for fine sowing, sowing to reach the half seed into the mud, can not see the seed, in order to prevent sowing depth is not the same, the seedling is not uniform, after sowing with a shovel patting, so that the seed and mud surface level. To be covered with manure can not be wet, and then 1:2 sifted ripe manure cover, manure thickness 0.7?1 cm. This is critical. It is strictly prohibited to thin mud under the seed, mud covered with dung soil. The bed covered with dung soil is dry and breathable, which is important for promoting seed rooting. If the air permeability is poor, less rooting, weak seedlings, tillers are also less, at the same time, it can also play a role in preserving moisture and increasing temperature, controlling the rise of groundwater, inhibiting the rise of salinity, prompting the root system to go down, to achieve the purpose of rooting more than the seedling Wang.

6, watering fertilizer

Three leaves before the dry long mainly, three leaves after the period, if the nutrition is poor, easy to induce vertical blight. Two leaves a heart period, apply weaning fertilizer, mu with 45% formula fertilizer or urea 3?5 kg, watering a small water; three leaves a heart, apply tiller fertilizer, mu 10 kg of urea or formula fertilizer 12?15 kg, watering a small water, prompting seedlings tillering. Later, as long as the bed does not return to alkali or seedling leaves do not roll, should minimize the number of watering, so that seedlings dry long, promote root development, improve the quality of seedlings. To return to the alkali seedbed, seedling growth will be seriously affected, to wash the bed with water, water to water alkali, the morning full of water, the afternoon drain water, wash alkali and then watering fertilizer. Usually pay attention to the weather forecast, encounter windy and cooling weather, pay attention to irrigation to prevent low temperature and cold damage. Seedlings 35?40 days to stop water to practice seedlings, so that the seedling organization old healthy, leaf uplift, improve the ability to resist adversity.

8, chemical control spray fertilizer

Chemical regulation, you can achieve the purpose of strong seedlings, tillers, roots. In the rice two leaves and one heart period, each mu with 15% doxorubicin 120 grams of water spray. Spraying should be uniform, not miss spraying heavy spraying, so that the seedling growth is consistent. A week before rice transplanting, can mu with 5 grams of rooting agent with 15 kg of water foliar spray, prompting seedlings to grow root primordial, after transplanting, rapid growth elongation.

Precautions before dry seedling emergence

Temperature management: in order to ensure early germination, early emergence, out of all seedlings, dry seedling emergence should be done before the emergence of heat preservation work. The measure is to cover the agricultural film, the agricultural film is damaged in time to make up. Often beat off the dust and snow on the film, increase the light transmission rate of the film, improve the temperature. When there is a cold wave, the film should be covered with grass thatch and other insulation.

Moisture management: bed soil moisture is insufficient, uneven, will affect the emergence of seedlings and flush, so you should always check the bed soil moisture status of the seedbed, found that the topsoil is dry and white, it should be timely replenishment of water.