Chunjiang 03 stem (rice)

Chunjiang 03 stem is a new japonica rice variety bred by crossing Xiushui 11 as female parent and T82-25 as male parent.

Yield performance: in the Hubei regional trials in 1994 and 1995, Chunjiang 03 japonica had the highest average yield of 435.64kg per mu, which was 9.74% higher than that of the control Eyi 105. in the late rice variety comparison test of Xiaogan City and District from 1994 to 1996, the average yield of 468.51kg per mu ranked first, which was 16.66% higher than that of Eyi 105and 15.01% higher than that of Bing664 (CK2). In 1995, the demonstration planting in Xiaogan was more than 200mu, and the average yield per mu was 461.4kg. In 1996, the demonstration was expanded to more than 10000 quotients, with a general yield of about 450kg per mu, which was higher than that of other varieties in production by 50~100kg.

Chunjiang 03 has the characteristics of vigorous growth, strong tillering ability, high panicle rate, compact plant type, fertilizer resistance and lodging resistance, cold tolerance in the later stage, good mature color conversion and easy threshing. The plant height is about 85cm, the effective ear is about 300000 per mu, about 70 grains per panicle, the seed setting rate is 85%-90%, the 1000-grain weight is 282.29g, the comprehensive score of rice is 57 points, which reaches the first-grade rice standard issued by the Ministry, and the taste is good. The full heading stage was 1-3 days later and the whole growth period was 3-5 days longer than that of Eyi 105 sown and planted at the same time. Resistance to rice blast and leaf cutting inoculation test at booting stage showed moderate to high resistance to bacterial blight KS-6-6 and Zhe 173, but light to sheath blight and rice false smut.

Breeders China Rice Research Institute

Region and technology 1. Sowing at the right time and cultivating strong seedlings: it is suitable for double-cropping late rice to be sowed from June 15 to 20, sowing amount of 30~35kg per mu in seedling field, seed 5~6kg per mu in Honda, and applying paclobutrazol in one leaf to promote tiller. two。 Properly close planting, focusing on multi-spikes: Honda inserts 30,000 clumps per mu, each with 4-5 seedlings. 3. Heavy application of base fertilizer and supplementary application of grain fertilizer: generally, basic application of ammonium bicarbonate 60~70kg, phosphate fertilizer 20~30kg, potassium chloride 7.5~10kg per mu, and urea 2~3kg after heading. Other management is the same as the general high-yield cultivation of double-cropping late japonica.