Huaidao 11, a new japonica rice variety newly approved in Jiangsu Province (Su Shendao 200805)

Huaidao 11, formerly known as "Huai 276", was systematically selected by Huaiyin Agricultural Science Research Institute of Xuhuai region of Jiangsu Province and bred in 2004. It is a medium-maturing and medium-maturing japonica rice variety. It is suitable for planting under the condition of middle and high fertility in Huaibei area of Jiangsu Province.

First, the yield level and characteristics. He participated in the regional trial of Jiangsu Province from 2005 to 2006, with an average yield of 578.8 kg per mu in two years, an increase of 1.9% over the control Zhendao 88, not significantly in 2005, and extremely significant in 2006; in 2007, the average yield per mu was 629.3 kg, 5.4% higher than that of the control. The average results of the provincial regional test were as follows: 184000 effective panicles per mu, 123 filled grains per panicle, seed setting rate 88.4%, 1000-grain weight 27.7g. The plant height was 103.9 cm and the whole growth period was 156d, which was 1-2 days later than that of the control.

The plant type is compact, the growth is prosperous, the panicle type is medium, the tillering ability is medium, the leaf color is dark green, the population uniformity is good, the late mature color is good, and the lodging resistance is strong; in inoculation identification, it is susceptible to bacterial blight, panicle neck blast and highly susceptible sheath blight; from 2006 to 2007, the highest incidence of stripe blight was 24.4% in field planting identification (the average incidence rate in two years of susceptible control was 70.5%). Physical and chemical index of rice quality: according to the food quality testing center of the Ministry of Agriculture in 2005, the rate of head rice was 72.0%, the rate of chalky grain was 10.0%, the degree of chalkiness was 1.0%, the gel consistency was 76.0 mm, and the content of amylose was 18.4%, which reached the national standard of second-class high-quality rice.

2. Key points of cultivation techniques

1. Sowing at the right time and cultivating strong seedlings: generally sowing in the first ten days of May, the net sowing amount of wet seedlings is about 20 kg per mu, the net board sowing rate of dry seedlings is 30-40 kg per mu, and the amount of seeds used in the field is 3-4 kg per mu.

2, timely transplanting, reasonable close planting: transplanting in early June, the seedling age is about 30 days, generally planting about 18000 holes per mu, basic seedlings 60-70 000, low fertility fields can be planted in the right amount.

3. Scientific management of fertilizer and water: generally, 16-18 kg of pure nitrogen is applied per mu, in which the ratio of base fertilizer to panicle fertilizer is 5.5 and 4.5. Basic fertilizer should be applied before soil preparation, and panicle fertilizer should be taken into account. In terms of water slurry management, planting seedlings in thin water, living trees in an inch of water, tillering in shallow water, heading and flowering in deep water, alternating between dry and wet in the later stage, shelving the field appropriately when the total number of seedlings per mu reached about 200000 per mu, controlling the peak seedlings at 25-260000 per mu, and the water was cut off 7 days before harvest.

4. control of diseases, insect pests and weeds: soaking seeds before sowing to prevent seed-borne diseases such as evil seedling disease and dry-tip nematode disease, pay attention to the control of gray planthopper and rice thrips in seedling and field stage, and comprehensively control sheath blight, stem borer, longitudinal leaf borer, rice planthopper in the middle and later stage. Special attention should be paid to the control of rice panicle neck blast.