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Introduction to the Conventional Rice Variety Liaojing 371

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Characteristics: This variety is a conventional japonica-type rice variety. In the late-maturing rice regions of Northeast and Northwest China, the average whole growth period is 154.7 days, 3 days later than the control Qiuguang. Plant height is 100 cm, tillering ability is relatively strong, plant type is loose, leaves are drooping, panicle type is loose, grain setting is relatively dense, glumes are yellow-white, and awns are absent. Total grain number per panicle is 80.5 grains, seed setting rate is 82.4%, and 1000-grain weight is 26.2 g. Resistance: seedling blast grade 3, leaf blast grade 5, panicle blast grade 5. Main rice quality indicators: head rice rate 69.6%, chalky grain rate 3.3%, chalkiness degree 0.2%, gel consistency

Characteristics: This variety is a conventional japonica-type rice variety. In the late-maturing rice regions of Northeast and Northwest China, the average whole growth period is 154.7 days, 3 days later than the control Qiuguang. Plant height is 100 cm, tillering ability is relatively strong, plant type is loose, leaves are drooping, panicle type is loose, grain setting is relatively dense, glumes are yellow-white, and awns are absent. Total grain number per panicle is 80.5 grains, seed setting rate is 82.4%, and 1000-grain weight is 26.2 g. Resistance: seedling blast grade 3, leaf blast grade 5, panicle blast grade 5. Main rice quality indicators: head rice rate 69.6%, chalky grain rate 3.3%, chalkiness degree 0.2%, gel consistency 88 mm, and amylose content 16.7%.

Yield performance: In 2001, it participated in the national rice variety regional trial in the northern rice region, with an average yield of 584.1 kg per mu, 8.3% lower than the control Qiuguang (significant); in the 2002 continued trial, the average yield was 573.1 kg per mu, 14.1% lower than the control Qiuguang (highly significant). In the 2002 production trial, the average yield was 584.3 kg per mu, 10.1% lower than the control Qiuguang.

Key cultivation techniques: 1. Timely sowing: sow in early April, with a sowing rate in the seedling field of 150-200 g per sq m, ventilate in a timely manner to harden seedlings, and cultivate strong seedlings with tillers; 2. Reasonable sparse planting: transplanting spacing is 29.7 x 13.2 or 29.7 x 16.5 cm, with 3-4 seedlings per hill; 3. Fertilizer and water management: for fields with medium fertility, apply 50-55 kg of standard nitrogen, 10 kg of diammonium phosphate, 15 kg of potassium fertilizer, and 1-1.5 kg of zinc fertilizer per mu. For water management, achieve shallow-water transplanting, 1 cun of water for seedling recovery, shallow water for tillering, and sun-dry the field when enough tillers are reached; do not cut off water too early in the later stage to prevent premature senescence; 4. Pest and disease control: pay attention to controlling rice blast, sheath blight, rice false smut, and Asiatic rice borer and other pests and diseases.

National Variety Approval Committee approval opinion: After review, this variety meets the national rice variety approval standards and has passed approval. This variety is moderately susceptible to rice blast. The rice quality is excellent, reaching the national standard grade 1 high-quality rice standard. It is suitable for planting in the late-maturing rice region of Jilin Province, northern Liaoning, the rice blast lightly occurring areas in central Shanxi Province, as well as the Ningxia Yellow River irrigation area and the ** rice region.

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