Jiudao 23 (formerly codenamed 99423) (Rice)

Breeding unit: Academy of Agricultural Sciences, Jilin City, Jilin Province.

Examination and approval: examined and approved by the National Crop Variety Examination and Approval Committee in 2000.

Variety approval number: Guoshen Rice 20000013.

Source of variety: Qingxi 96/Tengxi 138.

Characteristics: japonica conventional varieties. Plant height about 100 cm, leaves slightly longer, leaf color moderate, plant compact moderate, strong tillering ability, panicle larger. The average number of grains per panicle is about 100, the green stalk is yellow, the panicle length is about 19 cm, the total number of grains per panicle is 96.6, the seed setting rate is 82.9%, the 1000-grain weight is 25.7 g, the grains are oval, there are sparse awns, and the glumes and glumes are yellow. Head rice rate 61.8%, chalkiness 9.2%, chalkiness rate 66%, gel consistency 84 mm, amylose content 18.6%. The whole growth period was 147 days, 4 days later than that of Jiyujing. High yield and stable yield, weak resistance to rice blast, medium rice quality. In 1998, the average yield per mu was 587 kg, 9.9% higher than that of Jiyujing. In 1999, the average yield per mu was 633.2 kg, 4.0% higher than that of Jiyujing. In 1999, the average yield per mu was 631 kg, 11.1% higher than that of Jiyujing.

Cultivation key points: adopt sparse seeding strong seedling technology, 60g germinated seeds are sown in each tray of seedling, 200g germinated seeds are sown in each square meter of dry seedling, transplanting specifications are generally 30cm X16.5cm or 30cm X20cm, and 3-4 plants are planted in each hole. On the basis of increasing phosphorus and potassium fertilizer, pure nitrogen is generally applied 10-11 kg per mu, which can be divided into base fertilizer, tiller fertilizer, supplementary fertilizer and ear fertilizer. Water management is based on shallow irrigation and combination of dry and wet. Pay attention to the prevention and control of diseases, insects, weeds and rats during the whole growth period.

Suitable range: Jilin, Liaoning, Heilongjiang, ** effective activity accumulated temperature above 2850℃, rice blast light area planting.