Chaoyou No. 1 (Rice)

[basic situation] Chaoyou 1 (also known as Jindao 1229) is bred by Tianjin Rice Research Institute by three-line crossing and conventional breeding. Its parent combination is (FH-541A/ Jinzhu 1) F1 × 84-11.

[characteristics] all the indexes of this variety meet the national first-class standard of high quality rice, including 10.32% crude protein (brown rice), 17.34% amylose (milled rice), 84% brown rice, 75.64% milled rice, 74.34% head rice, O chalkiness and heavy whiteness, gel consistency 80mm, gelatinization temperature (alkali elimination value) 7, transparency 0.83, length-width ratio 1.9. Grain length 5.2mm, wide 2.8mm. Rice is the egg color, the rice grain is complete and shiny, not only the appearance is glittering and translucent, but also the rice is fragrant and delicious. Cultivated as middle rice or late rice in Beijing and Tianjin, the whole growth period is 145 days, with per unit yield of 7500~900Okg/hm2, plant height 110cm, large panicle and large grain, panicle length 22cm, average 116grains per panicle, 1000-grain weight 26,27g, seed setting rate 91%. Resistant to rice blast and false smut, the yield of medium fertility cultivation was higher than that of the control and had better yield. Chaoyou 1 has a restorer gene and has a good resilience to the stem-type male sterile line.

[breeder] Tianjin Rice Research Institute

[region and technology] the sowing rate in the seedling field is 450kg / hm2, and the suitable seedling age is 30~4Od, sowing in the middle of May and transplanting in the middle and last ten days of June. After emergence, before one leaf, 3kg/hm2 paclobutrazol was used to spray water 150Okg/hm2 evenly after drying, which could effectively control overgrowth and increase tillering. Topdressing early, applying full-layer fertilization in medium fertility, applying diammonium 187.5kg/hm2262.5kg/hm2 urea to Honda, and then fertilizing the soil to promote fast fertilizer efficiency and early tillering. The first fertilizer was applied 10-15 days after transplanting, generally 150Kg/hm2 urea plus 4.5Kg/hm2 insecticidal double. After 1Od, 75kg/hm2 urea was used to find and supplement the weak seedlings. 20% of the amount of weight loss can be appropriately increased and reduced in drought and waterlogging years. Soaking seeds with Caochongqing for 2 to 3 days before sowing, and paying attention to control diseases and insect pests such as Chilo suppressalis, Chilo suppressalis, Rice planthopper and Rice blast during the growth period. The growth period of this variety introduced to the south tends to be shortened, which is about 115-120 days in Luoyang, Henan Province, with developed root system and strong drought resistance, so it can be used for dry planting of rice and water cultivation of wheat stubble rice, and it is 107 days in Jianghua County, Hunan Province. The yield of throwing seedlings per unit area is 7200kg/hm2.

The base fertilizer was applied with urea 225kg/hm2 and diammonium 75kg/hm2, spread evenly and rotary ploughed into the soil. When sowing, the soil moisture should be sufficient, and the head water can also be irrigated, but the effect is not as good as that of the former. Sowing amount is 150kg/hm2, soaking seeds with Chong Chong Qing for 48h, row spacing 25~3Ocm, sowing width 10cm. It is appropriate to sow deep 1~2cm, and broadcast along with repression. Use Nongsi to seal off weeds. Water should be replenished during drought in the early stage, and flooded irrigation should be changed as far as possible at the tillering stage. The whole growth period is dry for a long time, and there is a danger that the growth period will be prolonged and immature. All fertilizers should be applied before July 15 to strictly prevent excessive nitrogen fertilizer in the later stage.

Chaoyou No. 1 is suitable for planting in medium fertility areas of Beijing, Tianjin, Hebei, Shandong, Henan, Shaanxi, Shanxi, Liao and Ningxia. It is mainly used as medium rice or wheat stubble rice in Beijing, Tianjin, Hebei and other areas, high-quality rice varieties are widely planted in Liaoning and other areas, and dry varieties are widely planted in Henan and other areas.