Longliangyou 8612

Approval No.: guoshendao 20190010

Variety name: longliangyou 8612

Applicant: Anhui Longping high tech Seed Co., Ltd

Breeders: Yuan Longping Agricultural High Tech Co., Ltd., Hunan Longping high tech Seed Industry Research Institute Co., Ltd., Hunan Yahua Seed Industry Research Institute, Anhui Longping high tech (Xinqiao) Seed Industry Co., Ltd

Variety source: Longke 638s × Huahui 8612

Characteristics: two line indica hybrid rice. In the middle and lower reaches of the Yangtze River.

1. The maturity period is moderate: the whole growth period is 137.1 days.

2. Strong lodging resistance: moderate plant height, short basal internode, elastic stem.

3. Strong disease resistance: the comprehensive index of rice blast was 2.7 and 3.0 respectively in two years, and the loss rate of neck blast was the highest grade 3. It had good tolerance to Rice False Smut and hardly infected with bacterial leaf streak (red leaf disease).

4. High yield: large panicle, big grain, 167000 effective panicles, strong heat resistance at heading stage and good seed setting rate. In the production test in 2018, the average yield per mu was 637.67 kg, 10.59% higher than that of Fengliangyou 4.

5. Good rice quality: high yield, transparency, chalkiness 0.8%, light fragrance, good taste.

Yield performance: in 2017, the average yield per mu was 661.75kg, which was 9.19% higher than that of Fengliangyou 4; in 2018, the average yield was 659.52kg, 7.94% higher than that of Fengliangyou 4; the average yield per mu was 660.63kg, 8.56% higher than that of Fengliangyou 4 in two years; the average yield was 637.67kg in 2018 The yield of Fengliangyou 4 was 10.59% higher than that of Fengliangyou 4.

Cultivation techniques: 1. According to the local ecological conditions, timely early sowing, 0.75 kg per mu of field, 8-10 kg per mu of seedling field, sparse sowing and even sowing, to cultivate multi tiller strong seedlings. 2. The leaf age of seedlings is about 5.5 leaves, and the seedling age is controlled within 30 days; the planting specification is 20 cm × 26.5 cm, with 12500 holes per mu, 2 grains per hole, and more than 60000 basic seedlings per mu. 3. The level of fertilizer needed is medium, and the fertilization method of heavy base fertilizer, timely topdressing tiller fertilizer, and late stage seedling and ear fertilizer application should be adopted. In general, 11-12kg pure nitrogen was applied per mu, and the ratio of N, P and K was 1:0.5:0.7, and the base fertilizer (70% of nitrogen fertilizer was used as the base fertilizer and 30% as the topdressing), and the tillering fertilizer was applied in the early stage. After transplanting, deep water should be used to promote tillering in tillering stage, enough seedlings should be dropped into the field in time, from booting stage to heading stage, there should be shallow water on the field surface during the filling stage, so as to avoid premature aging and quality deterioration. 4. Insist on Soaking Seeds with strong chlorine. In the seedling stage, we should pay attention to the control of rice planthopper to prevent the southern black streaked dwarf disease; in the field, we should control the rice planthopper, false smut, sheath blight, bacterial leaf blight, southern black streaked dwarf disease and borer.

Approval opinion: the variety meets the national rice variety approval standard, and has passed the examination and approval. It is suitable for planting one season mid season rice in Hubei Province (except Wuling Mountain Area), Hunan Province (except Wuling Mountain Area), Jiangxi Province, Anhui Province and Jiangsu Province, as well as medium rice area of Zhejiang Province, northern rice area of Fujian Province and southern rice area of Henan Province.