Nanjing 5055

Variety type: Japonica conventional rice

 

Approval number: Su Shendao 201114

 

Characteristics: compact plant type, vigorous growth, strong tillering power, darker leaf color, good population uniformity, medium ear shape, skewed upright, denser grain, and strong lodging resistance. The effective ears per mu are 204,000, the number of grains per ear is 121, the seed setting rate is 91.4%, the thousand-grain weight is 24.7 grams, the plant height is 96.5 cm, and the whole growth period is about 160 days.

 

Resistance performance: moderately susceptible to bacterial leaf blight, sheath blight, and stripe leaf blight.

 

Quality performance: According to the inspection of the Food Quality Inspection Center of the Ministry of Agriculture: the whole rice rate is 71.4%, the chalky grain rate is 10.0%, the chalkiness is 0.8%, the gel consistency is 87.0 mm, and the amylose content is 10.1%. It belongs to the yin waxy type and is of high quality Eating variety, was named "the best rice in Jiangsu Province".

 

Yield performance: The average yield per mu in the two years of the Jiangsu regional trial was 614.5 kg, which was an increase of 4.8% compared to the control Ningjing No. 1; the average yield per mu in the production test in 2010 was 637.7 kg, which was an increase of 6.0% compared to the control.

 

Adaptation range: Suitable for planting along the Yangtze River and southern Jiangsu Province.

 

Cultivation technology points:

 

1. Sow seeds at an appropriate time and cultivate strong seedlings. Generally, the seedlings are planted in mid-May. The sowing rate of moist seedlings is about 25 kg per mu of net seedling board, and the sowing rate of dry seedlings is about 35 kg per mu of net seedling board. Machine-transplanted seedlings are planted on May 20-25. Kilogram.

 

2. Transplant at the right time and plant closely. Transplanted in early and mid-June, the seedling age is about 30 days, generally 15,000-18,000 holes are planted per acre, and the basic seedlings per acre are 60,000-80,000.

 

3. Scientific fertilizer and water management. Generally apply pure nitrogen 18-20 kg per mu, master the principle of “weight before, medium stability, and make up afterwards”, apply tillering fertilizer early, apply nitrogen fertilizer stably during jointing stage, increase phosphorus and potassium fertilizer, and apply ear fertilizer to seedlings in later period. The ratio of basal tiller fertilizer to ear fertilizer should be 7:3, and the nitrogen, phosphorus and potassium should be used in combination; in order to maintain the high-quality taste of this variety, it is advisable to apply less nitrogen fertilizer and more organic fertilizer, especially in the later period, try not to apply nitrogen fertilizer as much as possible. . In the management of water slurry, we should master shallow water and frequent irrigation in the early stage to promote early onset.

 

4. Prevention and treatment of diseases, pests and weeds. Before sowing, use chemicals to soak seeds to prevent seed-borne diseases such as bakanae and dry tip nematodes. Pay attention to the prevention and control of Laodelphax striatellus and rice thrips during the seedling and field stages. In the middle and late stages, comprehensive control of sheath blight, stem borers, and rice worms should be carried out. Leaf rollers, rice planthoppers, etc., pay attention to the prevention and treatment of panicle-neck rice blast and bacterial blight.