New hybrid indica rice combination K You 818: high yield, good quality and disease resistance

K You 818 is a new hybrid indica rice combination with high yield, good quality and disease resistance, bred by the Institute of Agricultural Sciences of the Lixiahe Region of Jiangsu, and produced and distributed exclusively by Nanjing Shenzhou Seed Industry Co., Ltd. This variety has applied for national new variety protection and patent, with the announcement number: CNA000548E. It passed the Jiangsu provincial approval in 2001, and in the same year entered the national southern rice region high-yield group regional trial, with a yield of 660 kg per mu, ranking first among the tested combinations. In 2002, it exceptionally entered the national southern rice region production trial, with a yield increase of 10.65% per mu compared with the control, ranking first, making it a veritable national champion. It is currently the new variety with the highest yield in China and the most outstanding combination of high yield and good quality, and is the preferred leading new hybrid rice variety for achieving high yields and helping farmers get rich. In 2003, it passed the national approval as the first place, with the national approval number: Guoshendao 2003055.

When cultivated in Jiangsu, the whole growth period is 145 days, 3-4 days later than Shanyou 63. The plant height is about 125 cm, the plant type is moderately compact, the leaves are upright, the tillering ability is relatively strong, the spike-forming rate is high, the panicle-grain structure is coordinated, and the late-stage ripening appearance is good. Generally, the effective panicles per mu are 170,000-180,000, the total grains per panicle are 160-170, the seed-setting rate is about 85%, and the 1000-grain weight is 30 g. The grain quality is good, with a quality index of 83 points, ranking first among the tested combinations. It is highly resistant to bacterial leaf blight, lightly affected by rice blast and sheath blight, has strong lodging resistance, and is tolerant to high temperature.

In cultivation, thin sowing or dry raising should be used to cultivate strong seedlings, sufficient base fertilizer should be applied, tillering fertilizer should be applied early to promote early growth, and after transplanting 15-20 days, when the seedling number is sufficient, the field should be drained in time; panicle fertilizer should be applied lightly or not at all, and water should not be cut off too early in the later stage. From the initial heading stage to the full heading stage, carbendazim and similar agents should be used to control rice false smut, and in areas prone to rice blast, good control work for rice blast should be carried out.