Chutuan 17 (Rice)

Chubian17 is a new mid-japonica medium-maturing conventional rice variety bred by Chujing 8 / 25-3-1 in Chuxiong Prefecture, Yunnan Province.

The whole growth period of this variety is 170-175 days, plant height is 95cm-100cm, plant type is compact, flag leaf is straight, stem is stout, tillering ability is medium, effective ear per mu is 280000-300000, panicle rate is high, panicle type is larger, the number of grains per ear is 120,150, seed setting rate is 80%-85%, 1000-grain weight is 26,28g, hull yellow, glume tip colorless, awnless, white rice, moderate shedding, high yield and stable yield.

Chutuan 17 rice is of good quality. tested by the millet chemical line of China Rice Research Institute, brown rice rate is 85.1%, milled rice rate is 77.2%, head rice rate is 74.9%, gel consistency is 80 mm, gelatinization temperature is 7.0, amylose content is 19.2%, protein content is 8.0%, chalkiness rate is 98%, chalkiness is 23.8%, transparency grade 4, grain length 5.0 mm, ratio of length to width 1.6. The first seven indicators are up to the first-grade stem rice standard issued by the Ministry. According to the identification of blast resistance of physiological races of rice blast in the plant protection line of Yunnan Agricultural University, four races Al, D1, El and G1 were resistant to blast, and three races B13, C13 and F1 were moderately resistant, which showed resistance to blast in regional trials and large-scale production. This variety participated in the regional test of Yunnan Province from 1995 to 1996, with an average yield of 650 kg per mu, ranking first among the tested varieties, increasing 56 kg per mu and 9.43% higher than that of the control variety 24, reaching a very significant level.

Cultivator Yunnan Chuxiong Prefecture Institute of Agricultural Sciences

Regional and technical Chujing 17 is suitable to be popularized and planted in the mid-altitude rice area of 1500m to 1850m in Yunnan-Guizhou Plateau. At present, the popularized area has reached 870000 mu, increasing the output of rice by 70 million kg, and it is estimated that 1 million mu can be popularized in the next two years of the Ninth five-year Plan.

Cultivation rules:

1. Sowing at the right time, the cultivation of strong seedlings is generally sown from March 15 to March 20, and transplanted in the first and middle of May. Sow 20-25 kg per mu. The tillering ability of this variety is moderate and weak, so strong seedlings with 2 or 3 large tillers should be cultivated to lay the foundation for healthy plants and large ears. At the same time, properly increase the basic seedlings and improve the panicle rate.

two。 Apply sufficient base fertilizer, apply 10-12 kg of pure nitrogen in the window of panicle fertilizer, 70%-80% of the total pure nitrogen is used as base fertilizer and tiller fertilizer, promote early growth and rapid development of tillers, and lay the foundation for large panicles and improving panicle formation rate. Proper application of panicle fertilizer and increased application of phosphorus and potassium fertilizer in order to maintain roots and protect leaves and improve seed setting rate and grain weight.

3. The leaves of Chujing 17, a rice planthopper, were controlled in time in the seedling stage, and they were vulnerable to stripe disease caused by rice planthopper. The control of rice planthopper should be strengthened from 10 days after film uncovering to 7 days before transplanting.

4. Strengthen fertilizer and water management to prevent lodging due to the slightly longer node and large ear of this variety, the high-yield field is easy to lodge in the later stage, so it is necessary to sun up the field timely after the foot seedling, control the elongation of internodes and enhance the ability of lodging resistance.