New Rice Variety Examination and Approval ---- Zhong Jia Zao 2
2019-03-06 15:11:27
Zhongjiazao 2 is a conventional early rice variety selected by the Chinese Rice Research Institute and hybridized with Jefferson and Zhou 903. In January 2005, it was approved by the Jiangxi Provincial Crop Variety Approval Committee. Characteristics: The whole growth period was 107.0 days, 2.0 days earlier than the control Zhejiang 733. The variety of the field grows neatly, grows vigorously, has strong tillering power, and has more effective panicles. The seed setting rate is high, but the number of grains per panicle is small. The plant height is 83.6 cm, the effective ear is 208,000, the total grain number per panicle is 112.8, the grain number is 92.4, the seed setting rate is 81.9%, and the grain weight is 26.3 g. The roughness rate was 79.8%, the polished rice rate was 67.4%, the whole polished rice rate was 52.0%, the chalkiness rate was 9%, the chalkiness was 0.9%, the amylose content was 15.00%, the gel consistency was 74 mm, the grain length was 7.3 mm, and the aspect ratio was 3.3 , Transparency level 3, the basic elimination of 7 levels. The quality of rice is up to the national standard 3, and the standard is 2. Natural resistance identification of rice blast resistance: Grade 0 of seedling mites, Grade 3 of leaf mites, Grade 0 of panicle-neck defects. Production performance: From 2003 to 2004, they participated in the regional rice experiment in Jiangxi Province. In 2003, the average yield per mu was 454.21 kg, which was 1.98% higher than the control Yuzao No. 53. In 2004, the average mu production was 465.93 kg, which was 1.58% less than the control Zhejiang 733. Cultivation Techniques: Seed sowing at the end of March to the beginning of April, with a seeding volume of 25-30 kg per mu. About 30 days old, planting specifications 55-inch or 56-inch, 2-3 seedlings per hole. Apply 10-12 kilograms of pure nitrogen per acre, and the ratio of N, P, and K is 1:0.5:1. During the period of childbirth, the field is promptly sun-dried, and moist irrigation is used at the later stage to ensure adequate grouting. Pay attention to pest control. It is suitable for planting in the north of central Hebei.
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