Brief Introduction to the High-Quality Hybrid Aromatic Rice Variety Chuanxiangyou 2
1. Origin of the combination
Chuanxiangyou 2 is a high-quality hybrid aromatic rice developed by our institute by test-crossing the newly bred male sterile line Chuanxiang 29A with the newly bred restorer line Chenghui 177.
2. Yield and main characteristics
Chuanxiangyou 2 is a medium indica late-maturing hybrid combination, with a sowing-to-heading period 5 d longer than that of Shanyou 63. Through years of multi-site trials, the yield per mu was 573.3 kg, an increase of 7.8% over the control Shanyou 63. Chuanxiangyou 2 has a plant height of 117.2 cm, 150,000 effective panicles per mu, an average of 182 grains per panicle, a seed-setting rate of 82.2%, and a 1000-grain weight of 28.8 kg. In the 2000 provincial regional trial, it yielded 1.38% more than the control Shanyou 63. This combination has excellent grain quality, and the grains are of medium-long type. The rice grains are semi-transparent and glossy, and 1/16 of the grains have an aroma. According to the determinations by the Rice Product Inspection and Testing Center of the Ministry of Agriculture: seven indicators of Chuanxiangyou 2 - brown rice rate, milled rice rate, head rice rate, grain length, transparency, alkali spreading value, and protein content - reached the first-grade standard for high-quality rice; three indicators - length-to-width ratio, gel consistency, and amylose content - reached the second-grade standard for high-quality rice. (Brown rice rate 81.3%; milled rice rate 74.1%; head rice rate 62.7%; grain length 6.5 mm; length/width 2.8; chalky grain rate 40%; chalkiness 7.1%; transparency grade 1; alkali spreading value grade 6.2; gel consistency 46 mm. Amylose content 22.3%; protein content 8.6%.) It has a fresh aroma when cooked and good palatability.
3. Key points of cultivation technology
3.1 Timely sowing and cultivation of strong multi-tiller seedlings: late March to early April in northwest Sichuan, and mid-March in southeast Sichuan. Use two-stage seedling raising, increase the application of phosphorus and potassium fertilizers, and cultivate short, sturdy, multi-tiller seedlings.
3.2 Appropriate dense planting: for Chuanxiangyou 2, a planting density of 15,000-17,000 hills per mu is suitable.
3.3 Rational fertilization: apply heavy basal fertilizer and topdress early, with combined application of nitrogen, phosphorus, and potassium.
3.4 Timely control of pests and diseases: according to the forecasts of the local plant protection department, promptly control stem borers, rice skipper, planthoppers, bacterial leaf blight, sheath blight, and rice blast to ensure a bumper harvest.