How good is the rice variety Neixiangyou 3?
Characteristics: This variety is an indica three-line hybrid rice. Grown as a single-season mid-season rice in the upper reaches of the Yangtze River, its average whole growth period is 150.3 days, maturing 2.3 days earlier than the control Shanyou 63. Plant height is 114.2 cm, with a moderate plant-and-leaf form; the lower leaves are relatively narrow and rolled outward, while the upper leaves are medium-wide and upright. The panicle layer is neat, and the panicle and grain are relatively well coordinated. Cold tolerance is medium, and the color turns well at maturity. The rice has a delicate fragrance. The number of effective panicles per mu is 174,000, panicle length is 25.2 cm, total grains per panicle is 145.6, seed-setting rate is 78.2%, and 1000-grain weight is 30.1 g. Resistance: rice blast grade 3, bacterial leaf blight grade 5, brown planthopper grade 7. Main rice quality indicators: head rice rate 52.1%, length-to-width ratio 3.1, chalkiness rate 26%, chalkiness degree 4.1%, gel consistency 63 mm, amylose content 16%.
Yield performance: In 2002, it participated in the regional trial of the late-maturing high-quality mid-season indica group in the upper reaches of the Yangtze River, with an average yield of 565.46 kg per mu, 4.46% higher than the control Shanyou 63 (extremely significant); in the 2003 continuation trial, the average yield was 593.19 kg per mu, 2.94% higher than the control Shanyou 63 (extremely significant); the two-year regional trial average yield was 580.19 kg per mu, 3.63% higher than the control Shanyou 63. In the 2003 production trial, the average yield was 579.95 kg per mu, 5.97% higher than the control Shanyou 63.
Key cultivation techniques: 1. Grow strong seedlings: sow at the same time as Shanyou 63 according to local planting habits; because seedling age is highly flexible, transplanting medium-aged seedlings is preferable; 2. Transplanting: wide-narrow row planting is preferable, with 13,000-15,000 hills per mu, and ensure about 100,000 basic seedlings; 3. Fertilization: apply heavy basal fertilizer, topdress early, and avoid over-applying nitrogen fertilizer. For super-high-yield cultivation, the amount of superphosphate should be no less than 25 kg per mu and potassium fertilizer no less than 15 kg; 4. Water management: pay special attention to water management in the later stage; do not drain too early, as this affects quality and yield; 4. Pest and disease control: pay attention to controlling bacterial leaf blight.
Approval opinion: Upon review, this variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, relatively high yield, moderate resistance to rice blast, moderate susceptibility to bacterial leaf blight, and excellent rice quality. It is suitable for planting as single-season mid-season rice in the low- and medium-altitude rice areas of Yunnan, Guizhou, and Chongqing (except the Wuling Mountain area), the flatland rice areas of Sichuan, and southern Shaanxi.