High-yield cultivation of Hybrid Rice

1. Seedling raising (dry seedling raising technique)

1. Seed treatment and germination

Sun the seeds for 2 days before soaking the seeds, rinse with clean water, bleach out the empty grained grains, and pack the seeds with nylon mesh bags. Soak the seeds with 50% carbendazim wettable powder 500 times solution for 24 hours, remove the seeds and wash them with clean water, cover the seeds in plastic buckets for about 24 hours, and sow the seeds when the seeds are white.

2. Finishing of seedling bed

Before raising seedlings, select plots with leeward, sunny, fertile soil, less weeds, water source and good water quality. 1000 kg of rotten fine farm manure, 40 kg of common calcium and 15 kg of potassium sulfate were applied per mu and sprinkled evenly on the soil moisture. Break the soil into small pieces, level it, and divide the soil moisture by 1.2 meters wide. the soil moisture is generally about 10 meters long, not more than 15 meters.

3. Sow at the right time and sow in the middle of March

Before sowing, select the fertile and loose soil of the same soil type or the seedling bed soil, and use a sieve to cover the seeds.

First of all, flatten the seedling bed, then spray clean water, and then pour it thoroughly. Spread the seed-treated rice seeds evenly on the seedling bed, gently press the soil into the soil with a plank, and spread the pre-prepared seed cover soil evenly on the seedling bed. The thickness of the seed cover is not available, generally 0.5rel 1 cm.

After covering the seeds, spray herbicide, spray 110 ml of butachlor EC with water evenly per mu, and then cover the film with arch frame.

4. Management

Seedling water management: after sowing, watering is carried out according to soil moisture, and the whole seedling stage is generally watered for 3 times.

Fertilization: (1) weaning fertilizer: when one leaf is one heart, 10 kg urea is applied per mu. (2) send dowry fertilizer: apply 10 kg urea per mu one week before transplanting.

Weeding: mainly by manual pullout.

Pest control: about 10 days after emergence, 50% carbendazim wettable powder was sprayed with 500 times liquid, and about 25 days after emergence, 30 grams of 75% tricyclazole wettable powder per mu plus 50 grams of 90% insecticidal raw powder and 50 kg of water were fully mixed and sprayed, three days before transplanting, 30 grams of 75% tricyclazole wettable powder and 120 grams of 20% Yakuling wettable powder were fully mixed with water and then sprayed.

Second, transplant in time, transplant in late April, the seedling age is about 45 days.

1. Field preparation: close the field water when raking the last field, and apply 40 kg ammonium bicarbonate, 40 kg calcium superphosphate, 10 kg potassium sulfate and 2 kg zinc sulfate as base fertilizer.

2, planting specifications: (1) single row planting: plant spacing 4 × 6 (inch) 25000 clumps per mu, each clump 1 Mel 2 seedlings. (2) double-row strip planting: the row spacing was 4 × (4 × 8) inch, each seedling was 25000 clumps, and each clump was planted with 2 seedlings.

III. Field management

1. Water slurry management: inch water promotes turning green, shallow water promotes tillering. Enough seedlings to sun up the field to control ineffective tillering, control to the field to crack, turn white roots to have the effect of seedling control. Frequently irrigated at booting stage, dry and wet at filling stage and mature stage, mainly wet.

2. Topdressing: (1) after transplanting, 7 kg urea per mu was used for 7 days after transplanting, followed by topdressing and tillering fertilizer, combined with chemical weeding, and 0.4 Mu 0.5 kg herbicide ether mixed with chemical fertilizer was applied per mu.

(2) 10 kg urea per mu or 10 kg ternary compound fertilizer at jointing and booting stage.

IV. Pest control

The main diseases of rice are rice blast, bacterial blight and fine stripe disease.

Rice blast: seedling blast was sprayed with 45% thiazole 1200 times solution in the seedling field. Leaf blast was sprayed with 1800 times of EC Fuji 1 and sprayed again every 7 days. When 80% of the ear was about to break, the most effective control time of panicle neck blast was sprayed with 1000 times of tricyclazole wettable powder, and then sprayed again every 7 days could effectively control the occurrence of the disease.

Bacterial blight and thin stripe disease: at the initial stage of the disease, 2000 times of 10% Yekujing wettable powder or 1000 times of agricultural streptomycin were sprayed, and then sprayed again every 7 days.

If it rains within 3-4 hours after spraying, it should be sprayed again on the same day or the next day, so that the control effect can be achieved.

Pest control: the main rice pests are rice planthopper and borer. The rice planthopper can be sprayed with 1000 times of Chongling or 10 ml of fipronil per mu. It can not be killed with pyrethroids and can be controlled again every 5 days. Chilo suppressalis is sprayed with 150 ml of 25% insecticidal double wettable powder or 200 ml mixed with sand. Rice leaf roller is a very harmful pest. It is sprayed with 1.0-1.5 kg 2.5% trichlorfon powder or 50% fenitrothion or 1000 times of trichlorfon crystal.

Fifth, timely harvest

When the rice is fully ripe, harvest can effectively maximize the collection of products, early or too late harvest will affect the yield of products.