Zhongke 608

　　Certification Number: Shandong Certification No. 20226052

　　(Yi) Seed Introduction [2023] No.1 (Yu) Seed Introduction [2023] Yu040

　　Features and Characteristics:

　　Plant type semi-compact, summer-sown growth period of 102 days, 1 day later than the control Zhengdan 958, with 19 leaves per plant, purple sheath of the seedling, pale green style, green anthers, 7-8 tassels. Regional trial results: plant height 249 cm, ear position 100-108 cm, cylindrical ear, ear length 18.3-23.6 cm, ear diameter 5 cm, 16-18 rows per ear, 576.5 kernels per ear, red cob, yellow kernels, deep dent type, seed yield rate 87.2%-92.6%, weight 753.3-783.3 g/l.

　　Production Performance:

　　2018: Participated in the Shandong Joint Crop Union's summer corn variety regional trial (5,000 plants/acre), achieving an average yield of 673.8 kg/acre, a 10.8% increase over the control Zhengdan 958. 2020: Participated in the same trial, achieving an average yield of 776.6 kg/acre, a 9.4% increase over Zhengdan 958. 2021: Production trial yielded 633.0 kg/acre, a 9.4% increase over Zhengdan 958. 2023: In Shandong's key攻关 field, the yield reached 1976.8 jin/acre.

　　Cultivation Techniques Key Points:

　　Recommended density is around 4,500-5,000 plants per acre, with other management measures similar to general field crops. Suitable regions: Shandong, Henan, and Hebei summer-sown corn planting areas.