K you 5 (Rice)

Breeding unit: Rice Sorghum Research Institute, Sichuan Academy of Agricultural Sciences.

Approval: approved by Sichuan crop Variety approval Committee in 1996, Guizhou crop Variety approval Committee in 1998, and the National crop Variety approval Committee in 1999.

Variety approval number: national examination and approval rice 9900ll.

Variety source: K17AX Duohui 1.

Characteristics: it belongs to the medium indica late maturing combination of three-line hybrid rice. The plant height is 110mi 115 cm, the seedling stage is prosperous, the plant type is compact, the ligule and leaf margin are colored, and the total leaf number of the main stem is 16 leaves. The tillering ability is medium to high, and the highest seedling is about 270000 per mu. The effective panicle is about 180000 per mu. The ear is spindle-shaped, the ear length is to cm, the ear is filled with 130Mel 140 grains, the seed setting rate is 85%, the heading is neat, and the color is good in the later stage. Yellow grain, colored tip, oblong, a small amount of necklace. The weight of 1000 grains is 28ml / 30g, the rate of brown rice is 80%, the rate of milled rice is 70%, the transparency is good, the rice quality is medium and high, and the yield is good. The whole growth period is 144 days, which is 2 days earlier than that of Shanyou 63. Moderate susceptibility to bacterial blight and moderate resistance to rice blast. From 1995 to 1996, the average yield per mu was 574.13 kg and 539.33 kg respectively, which was 3.57% and 4.93% higher than that of Shanyou 63, the control.

Key points of cultivation: the sowing time in the southern rice area is the same as Shanyou 63; the suitable seedling age is 35 days, and the seed consumption of Honda is 1.25ml 1.5 kg per mu; the planting specification is 26.6 cm x 16.7 cm, with 2 seedlings per hole; before transplanting, apply sufficient base fertilizer, generally applying 10 kg pure nitrogen per mu, 25 kg calcium superphosphate, 100 kg plant ash, and 2 kg topdressing per mu 710 days after planting. K17A has high stigma exsertion rate and good outcrossing habit, so it is required to be strictly isolated in reproduction and seed production. K17A is light in neck and sensitive to gibberellin. The dosage of "920" is 70% of that of Shanyou combination, and when heading is 10%-15%, the leaves are gently cut and sprayed twice, and the amount per mu is strictly controlled within 12 grams. The impurity should be removed strictly and should be carried out at the initial heading stage.

Suitable scope: Sichuan, Chongqing, Guizhou Province and the same ecological type areas for medium rice cultivation.