Introduction to the New Indica Rice Variety Hongliangyou 166

Characteristics and quality main indicators overall performance: head rice rate 66.5%, length-to-width ratio 2.6, chalky grain rate 36%, chalkiness degree 6.4%, gel consistency 78 mm, amylose content 23.4%. Resistance performance: weighted average grade for rice blast resistance 5.7, resistance frequency 90%; bacterial leaf blight resistance grade 5. When grown as single-season mid-season rice in the middle and lower reaches of the Yangtze River, the average whole growth period is 137.3 days, 2.8 days later maturing than the control "Shanyou 63". Strong tillering at seedling stage, vigorous growth, moderate plant type with thick and sturdy stems, erect flag leaves, plant height about 120 cm, about 9 productive panicles per plant, about 165 total grains per panicle, seed setting rate about 85%, 1000-grain weight about 28 g, relatively good grain quality.

Cultivation techniques: sow thinly for seedling raising, transplant at the appropriate age: sow early at the proper time according to the mid-season indica production season in each region, with a seeding rate of 10-12 kg per mu of seedling field, and seedling age of about 30 days. For fields with medium to high fertility, transplant 15,000-18,000 hills per mu, with 1-2 grain seedlings per hill, and control the basic seedlings at about 50,000 per mu; for fields with relatively poor fertility, transplant 18,000-20,000 hills per mu, with 70,000-80,000 basic seedlings. Reasonable fertilization and scientific management: generally apply 15 kg of pure nitrogen per mu, using the method of "promoting at the early stage, controlling at the middle stage, and supplementing at the late stage", apply sufficient base fertilizer, apply tillering fertilizer early, and increase application of

phosphate and potassium fertilizers, control nitrogen fertilizer application at the middle stage, and apply appropriate amount of panicle fertilizer at the late stage, mainly flower-preserving fertilizer. For water management, irrigate frequently with shallow water at the early stage to promote early development, and drain the field early after enough tillers to control excessive growth, preferably by light drainage in several sessions; irrigate in time at the mid-stage of panicle differentiation, keep alternating dry and wet conditions at the late stage, and stop irrigation about one week before harvest. Disease and pest control: pay attention to timely control of rice blast, rice thrips, rice planthopper, striped stem borer, rice leaf roller, and other diseases and pests.

Suitable areas: suitable for planting in single-season mid-season rice areas in the middle and lower reaches of the Yangtze River.