Introduction to the Characteristics of the Cotton Elite Variety Xinqiu 2

Characteristics: A mid-maturing first-generation hybrid variety with introduced insect-resistance genes. In the Yellow River basin cotton region, the spring-planted growth period is 120 days. Emergence is relatively late, seedling vigor is weak, mid-season vigor is strong, and late-season vigor declines, with average leaf function. The plant type is compact, plant height 100 cm, leaves medium-sized and dark green, the first fruiting branch node at 7.5 nodes, 17.6 bolls per plant, bolls oval, easy boll opening, single boll weight 6.0 g, lint percentage 41.6%, seed index 10.1 g, pre-frost flower rate 96.5%. Tolerant to fusarium wilt, tolerant to verticillium wilt, resistant to cotton bollworm; HVICC fiber upper half mean length 30.4 mm, breaking strength 31.2 cN/tex, micronaire value 4.5, breaking elongation 6.3%, reflectance 74.6%, yellowness 7.2, uniformity index 85.4%, spinning consistency index 155.

Key cultivation techniques: 1. Use plastic film mulching or seedling transplanting. When the 5 cm soil temperature stably passes 15°C, sow direct-seeded cotton fields in mid-to-late April; for seedling transplanting, raise seedlings in early April. 2. For cotton fields of average fertility, plant at a density of 2000 plants per mu. 3. Apply sufficient base fertilizer, heavily apply flower and boll fertilizer, and spray foliar fertilizer as appropriate in the later stage; base fertilizer should be mainly organic fertilizer, apply nitrogen fertilizer steadily, appropriately increase phosphorus and potassium fertilizer, supplement micro-fertilizer as appropriate, and implement balanced fertilization. 4. According to cotton growth and appearance, follow the principle of small amounts applied multiple times, and carry out chemical regulation at the appropriate time. 5. In normal years, the second generation of cotton bollworm does not need control; when the third and fourth generations of cotton bollworm reach the control threshold, control as appropriate; control other pests promptly. 6. Under adverse climatic conditions, integrated control of fusarium wilt and verticillium wilt should be strengthened.

Approval opinion: This variety has obtained the agricultural genetically modified organism production and application safety certificate (the genetically modified organism name is sGKz32 (Xinqiu 2)), meets the national cotton variety approval standards, and has passed approval. It is a mid-maturing first-generation hybrid variety with introduced insect-resistance genes, suitable for spring planting in the Yellow River basin cotton region of southern and central-southern Hebei, Shandong, northern and central Henan, and Jiangsu and Anhui north of the Huai River. Promotion should be carried out strictly in accordance with the scope permitted by the agricultural genetically modified organism safety certificate.