Huaidao No. 11 (Su Shen Dao 200805): Jiangsu Province's newest approved japonica rice variety

Huaidao No. 11, formerly named "Huai 276", was developed by the Huaiyin Institute of Agricultural Sciences of the Xuhuai Region of Jiangsu through systematic selection from Huaidao No. 9, and was bred in 2004. It is a medium-maturing medium japonica rice variety. It is suitable for planting under medium-to-high fertility conditions in the Huaibei region of Jiangsu Province.

I. Yield level and characteristics. From 2005 to 2006 it participated in the Jiangsu provincial regional trial, with an average yield of 578.8 kg per mu over two years, an increase of 1.9% over the control Zhendao 88; the increase in 2005 was not significant, and the increase in 2006 was highly significant; in 2007 the production trial had an average yield of 629.3 kg per mu, an increase of 5.4% over the control. Average results of the provincial regional trial: 184,000 effective panicles per mu, 123 filled grains per panicle, seed-setting rate 88.4%, 1000-grain weight 27.7 g. Plant height 103.9 cm, whole growth period 156 days, 1-2 days later maturing than the control.

Compact plant type, relatively vigorous growth, medium panicle type, medium tillering ability, dark green leaf color, good population uniformity, good late-stage maturity color, strong lodging resistance; inoculation identification: moderately susceptible to bacterial leaf blight, susceptible to panicle neck blast, highly susceptible to sheath blight; field planting identification in 2006-2007 showed the highest hill incidence rate of stripe virus disease at 24.4% (the susceptible control had an average hill incidence rate of 70.5% over two years); rice quality physicochemical indicators: according to testing by the Food Quality Inspection Center of the Ministry of Agriculture in 2005, head rice rate 72.0%, chalky grain rate 10.0%, chalkiness degree 1.0%, gel consistency 76.0 mm, amylose content 18.4%, reaching the national standard second-grade high-quality rice standard.

II. Key points of cultivation technology

1. Sow at the appropriate time and cultivate strong seedlings: generally sow in early May; for wet seedling raising, sow about 20 kg per mu of net seedbed; for dry seedling raising, sow 30-40 kg per mu of net seedbed; use 3-4 kg of seed per mu of main field.

2. Transplant at the appropriate time and plant at a reasonable density: transplant in early June, with a seedling age of about 30 days; generally transplant about 18,000 hills per mu, with 60,000-70,000 basic seedlings; fields with low fertility may be planted somewhat more densely.

3. Scientific management of fertilizer and water: generally apply 16-18 kg of pure nitrogen per mu, with the ratio of basal fertilizer to panicle fertilizer preferably 5.5:4.5. Basal fertilizer should be applied before land preparation, and panicle fertilizer should balance promoting and preserving. In water management, transplant in shallow water, keep the seedlings alive in one-cun water, tiller in shallow water, and head and flower in deep water; alternate wetting and drying in the later stage; when the total number of stems per mu reaches about 200,000, drain the field moderately in stages to control the peak tiller number at 250,000-260,000 per mu, and stop water 7 days before harvest.

4. Control of diseases, insects, and weeds: before sowing, soak seeds with chemicals to prevent seed-borne diseases such as bakanae disease and white-tip nematode disease; during the seedling stage and main field stage, pay attention to controlling small brown planthopper and rice thrips; in the middle and late stages, comprehensively control sheath blight, yellow stem borer, rice leaf roller, rice planthopper, etc. Special attention should be paid to the control of rice panicle neck blast.