Introduction to the Huayou 838 Rice Variety and Its Characteristics

Characteristics: The full growth period is 122-125 days for the early crop and 118-120 days for the late crop, with a plant height of 107-122 cm. It has strong tillering ability, a compact plant type, uniform heading, fresh green leaf color, and good color at maturity. The effective panicles per mu are 180,000-210,000, with about 135 total grains per panicle, a seed-setting rate of around 85%, and a 1000-grain weight of 25-27 g. The brown rice rate is 78.2, the milled rice rate is 70.4%, the head rice rate is 50.4%, the grain length is 6.0 mm, the length-to-width ratio is 2.6, the chalkiness rate is 49%, the chalkiness degree is 4.2, the transparency is grade 1, the gelatinization temperature is grade 5.5, the gel consistency is 49 mm, the amylose content is 20.6%, and the protein content is 7.8%. The rice quality is noticeably improved compared with the Teyou combination, and field planting shows high resistance to rice blast.

Key cultivation techniques: 1. Sow and transplant early at the right time. For the early crop, sow in early March and transplant at the 5-5.5 leaf stage; for the late crop, sow in early July and transplant at 20-25 days of seedling age. 2. Plant at a reasonable density. Use a planting spacing of 7 x 3 (cun) or 7 x 4 (cun), with two seedlings per hill. 3. Apply sufficient basal fertilizer, topdress early, and cultivate and weed early. Use balanced fertilization, increase phosphorus and potassium fertilizer, control nitrogen fertilizer at the mid stage, and skillfully apply a final boost fertilizer at the late stage.