2.3 Timely transplanting, reasonable close planting

In order to establish a good high-yield seedling frame, He 50A and B were selected for transplanting on sunny days. Transplanting leaves aged 50A was 5.0-6.0 leaves, and He 50B was 4.0-4.5 leaves.

Breeding parent parents ratio of 2:8, female parent spacing is 16.5cm ? 6.5cm, parental spacing 20.0cm, parental spacing is 16.5cm ? 6.5cm, female parent inserted two or three gluten per hole, father This book is inserted one or two grains per hole.

2.4 Scientific management of fertilizer

Scientific management of fertilizer is the key to promoting the balanced growth of rice populations. In terms of water management, keep the shallow water live. After the seedlings return to green, the seedlings will be lifted to promote tillering. When the seedlings are enough, the fields will be properly cultivated, the late-stage tillering will be controlled, and the 4 to 5 cm deep water layer will be maintained during the heading and flowering period. Mature, avoid dehydration prematurely. Apply enough base fertilizer on fertilization, apply fertilizer in a suitable amount in time, and then apply Zhuang wolfberry fertilizer as appropriate at the later stage. Fertilizers are dominated by organic fertilizers. Nitrogen, phosphorus, and potassium fertilizers are used in combination to appropriately control the amount of nitrogen fertilizers. The total amount of fertilizer for general mu is 80kg for cooked cakes, 20kg for urea, 60kg for superphosphate, and 30kg for potassium chloride.

2.5 timely and appropriate application of ninety-two, scientific rush

In the breeding and seed production, the proper spraying of the 90% is one of the important technical links for winning high yields. He-50A has a strong ability to deliver, the size of the main and branch panicles is basically the same, and the spraying of Jiu-200 should be timely and appropriate in order to create an ideal panicle structure. Under normal circumstances, the amount of mu is 13 ~ 15 g, generally three sprays, female heading 10% 1t inch spray the first time, sprayed for 3 days. When spraying, follow the principle of “pre-light, medium-heavy, and post-supply”. Spray time is before 09:00 in the morning.

After 9200 spraying, artificial pollination was timely. Using a smooth surface rope to pollinate can not only reduce the labor intensity, but also reduce the damage to the flower. It also has the same advantages as the bamboo raft. Due to the strong stigma of He 50A, as long as the male parent loose powder during pollination, it should be powdered to avoid wasting pollen.

2.6 Comprehensive Prevention and Control of Pests and Diseases

Adopting comprehensive measures to prevent and control pests in a timely manner can effectively increase the reproductive yield and seed quality.

2.6.1 Strict seed disinfection. Soaking seeds combined with cleaning seeds remove turfgrasses, and soaking seeds with strong chlorine for 10 to 12 hours.

2.6.2 Management of scientific fertilizers to cultivate stable populations. Mainly organic fertilizer, combined use of nitrogen, phosphorus, and potassium fertilizers, control nitrogen levels, timely control seedlings drying field, and cultivate stable populations.

2.6.3 Chemical control. In the maternal flowering period and flowering period, each spraying of the black net or R & F library once, can effectively prevent the occurrence of rice smut. According to the pest control information of the plant protection department, the prevention and control of diseases and pests such as rice blast horses, aphids, planthoppers, rice blast, and sheath blight are mainly carried out.

2.7 strictly prevent miscellaneous insurance

2.7.1 Choose a good breeding base. Strict selection of breeding bases according to reproductive isolation requirements, time isolation requirements for more than 25 days, and space isolation requirements above 700m.

2.7.2 Strict impurity removal. During the seedling stage and the tillering stage, weeds and alien strains were removed, and the maintenance strains, mutant strains, and different strains were removed in time before and after the spraying of the 90.2 and before harvesting.

2.7.3 The father is removed promptly. After the pollination was completed, the father was removed promptly and the fields were cleared. It is not only helpful to clean up the father's trip and Daejeon's removal of impurities in the later period, but also helps the fields to be air and light, mature earlier, reduce the occurrence of diseases and insect pests, increase the seed plumpness, and increase the seed yield and quality.

2.74 Prevent mechanical clutter. The seeds are harvested immediately after maturity to prevent mechanical mixing during harvesting, sun drying, and selective processing to ensure seed quality.

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