Brief introduction of a New late Japonica Rice Variety Jia991

Jia 991 was approved by the 27th Variety approval meeting of Provincial Agricultural articles Review Committee in March 2003. In the urban trial of Jiaxing in 2000 and 2001, the average yield per mu was 537.2 kg and 563.7 kg respectively, which decreased by 4.38% and 3.19% respectively compared with the control Xiushui 63 (the difference was not significant). The average growth period of two years was 158.5 days, which was the same as that of Xiushui 63. The average yield per mu in the municipal production test in 2002 was 563.03 kg, which was 2.33% higher than that of Xiushui 63, the control. In the two-year urban test, the average effective panicle was 233000, the total grain per panicle was 108.9, the seed setting rate was 89.3%, and the 1000-grain weight was 26.8g. Identified by the Institute of Plant Protection of the Provincial Academy of Agricultural Sciences, it is moderately resistant to rice blast and bacterial blight, susceptible to fine stripe, brown planthopper and white-backed planthopper. According to the analysis of the quality Supervision, Inspection and Test Center of the Ministry of Agriculture, 11 indexes such as brown rice rate, milled rice rate, head rice rate, grain length, ratio of length to width, chalkiness, transparency, alkali elimination value, gel consistency, amylose content and protein content reached the first class standard of high quality rice issued by the Ministry of Agriculture. This variety belongs to dense panicle type, with moderate growth period, stout stalk, medium tillering ability, large panicle type, better rice quality, better yield and better blast resistance than Xiushui 63. It is suitable for transplanting late rice in northern Zhejiang.

Key points of cultivation techniques:

1. Timely sparse sowing and early sowing, sowing 30-35 kg per mu, seedling age about 30 days.

two。 Appropriate age transplanting reasonable close planting: appropriate age transplanting to promote early onset, reasonable close planting to increase the number of ears. About 25000 clumps per mu and 60-80 thousand seedlings per mu.

3. Combined fertilization: full application of organic fertilizer, total fertilizer 25-30 kg urea, and combined application of phosphorus and potassium fertilizer, fertilization methods to achieve heavy pre-control, reduce the amount of nitrogen in the later stage. On the basis of the good development in the early stage and setting up the shelf, the single cropping rice was achieved in the middle of July, and the continuous cropping late rice did not apply nitrogen fertilizer after the first ten days of August, in order to improve the seed setting rate and 1000-grain weight and achieve high yield and high quality.

4. Scientific water slurry management. In the middle and later stage, dry and wet alternately, healthy roots and strong tillers, do not cut off water too early in the later stage, attention should be paid to the prevention and control of rice blast in the areas with serious occurrence of rice blast.