Ken 12 (formerly coded wd06) (rice)

Breeding institution: Hebei Rice Research Institute.

Approval status: approved by the Hebei Provincial Crop Variety Approval Committee in 1997, and by the National Crop Variety Approval Committee in 1999.

Variety approval number: Guoshen Dao 990004.

Variety source: Jigeng 8 / Zhonghua 8 // Guandong 100.

Characteristics: ideal plant type, plant height 100-120 cm, thick and tough stems, green and upright leaves, good light-receiving posture, high light energy utilization rate, panicle length 16-18 cm, 100-110 grains per panicle, 1000-grain weight 25-27 g, brown grain tip, a large-panicle and large-grain type variety. Brown rice rate 83.41%, milled rice rate 75.45%, head rice rate 73.04%, chalkiness rate 20%, chalkiness degree 1.5%, crude protein 7.4%, gelatinization temperature grade 7, gel consistency 85 mm, amylose 24.1%, transparency grade 1. Growth period in the Beijing, Tianjin and Tangshan region is 170 days. Strong cold tolerance, fertilizer tolerant and lodging resistant, high yield and main rice quality indicators superior to the control. Participated in the national northern rice regional trial in 1996-1997, with a two-year average yield of 539.7 kg per mu, 12.1% higher than the control Jindao 1187. Participated in the national production trial in 1998, with an average yield of 614.5 kg per mu, 10.9% higher than the control Jindao 1187. High and stable yield, wide adaptability.

Cultivation points: sowing date from April 1 to April 10 is suitable. Adopt dry-raised cultivation techniques, with row spacing and plant spacing of 30 cm x 15 cm being suitable. Generally, applying 17-20 kg of pure nitrogen per mu is suitable. Pay attention to the control of sheath blight and other pests and diseases.

Suitable range: cultivated as single-season rice in the Beijing, Tianjin and Tangshan region.