Cultivation techniques of hybrid rice

Key points of hybrid rice cultivation techniques

First, cultivate strong seedlings with tillers:

1. Paddy field finishing: turning over the soil in winter and airing in slack season will loosen the soil and increase its air permeability. Combined with deep digging, apply decomposed farmyard manure1500-2,000 kg per mu, and repeatedly dig deep to make the clods fine. When sowing, the soil surface should be flat, free from weeds and sundries, dry and rotten, and free from water accumulation.

2. Seed treatment: dry the seeds for 2-3 hours before sowing to improve the germination potential of the seeds. When soaking seeds, soaking seeds for 48-72 hours (2-3 days) with 5 kspock can prevent and control seed-borne diseases, especially bakanae disease (male seedlings).

3. Precision Sowing: Sow 2 ~ 2.5 ㎏ per seedling field of hybrid rice. To reduce the number of seeds without reducing the seedling field, it is appropriate to sow one seed in the seedling field of 3 ~ 4㎏2 (matchbox size).

4. Seed coverage: Seeds must be covered with decomposed and subdivided agricultural fertilizers, and raw manure, chicken manure and urine ash are not allowed. The seeds must be covered tightly, with a thickness of 0.5 ~ 1 ㎝. Before covering the film, each paddy field should be mixed with water15ml of 30% savort EC. The film should be covered with soil moisture, the width of soil moisture is 1.7m, and the film should be covered with a little plastic film. Drainage ditches should be opened around the seedling farm to keep the drainage and irrigation unblocked.

5. Strengthen the management of seedlings: (1) Keep the surface of soil moisture in the soil moisture ditch wet after sowing and before uncovering the film, and pay close attention to the weather change, ventilate in time on sunny days to avoid burning buds and seedlings, and remove the accumulated water on the film in time on rainy days; (2) when the second true leaf of the seedling is unfolded, uncovering the film, leaving a thin layer of water on the seedbed after uncovering the film, and paying attention to the weather change at any time, and irrigating the seedling before greatly cooling down; (3) When uncovering the film, spray 3-5 kilograms of 65,438+0,000-65,438+0,500 times of Dixon liquid medicine per square meter of the bed surface to prevent wilting; (4) topdressing in time, applying weaning fertilizer at the 2-leaf stage, applying 0.5 kg urea per seedling field, applying wedding fertilizer 7- 10 days before transplanting, and applying urea 1 kg per seedling field; (5) Recently, sucking pests, represented by aphids, have become more and more harmful in Songming rice seedling stage, so it is necessary to do a good job of prevention and control, and spray insecticides and fungicides once before pulling out seedlings to avoid bringing eggs and germs into the field. Weedy paddy fields can be controlled by spraying 0.5-0.8 ㎏ copper sulfate mixed with 8- 10 ㎏ fine soil every minute.

2. Standardized transplanting: fixed-point pull-line transplanting, row spacing of 4×6 inches, 25,000 clumps per mu, multi-tiller transplanting 1 plant, and few or no tiller transplanting.

Third, scientific fertilizer and water management:

1, fertilizer field, applying high-quality farmyard manure 1000 kg, calcium superphosphate 30 kg, urea 10 kg and potassium sulfate 10 kg as base fertilizer per mu;

2. Topdressing: 5-7 days after transplanting, apply urea 10 kg (including herbicide) per mu;

3. Water management: after transplanting, properly protect seedlings in deep water, manage them in shallow water at tillering stage, and dry them naturally. When the tillering seedlings reach the expected effective panicle number, they should be drained and aired until they crack.

Four, do a good job in the prevention and control of diseases, pests and rodents with rice blast as the core.