Zhongke 608

Certification Number: Shandong Audit Corn 20226052

(Ji) Seed Import [2023] No. 1 (Yu) Seed Import [2023] Yu040

Features and Specifications:

Plant type semi-compact, summer-sown growth period of 102 days, 1 day later than the control Zhengdan 958, with 19 leaves per plant, 幻苗 sheath purple, anthers light green, anther green, male spike branches 7-8. Regional test results: plant height 249 cm, ear height 100-108 cm, ear shape cylindrical, ear length 18.3-23.6 cm, ear diameter 5 cm, row number 16-18 rows, grain number 576.5, red stalk, yellow grains, deep dent type, seed yield rate 87.2%-92.6%, weight 753.3-783.3 g/l. In 2021, evaluated by the College of Plant Protection, Shandong Agricultural University: highly resistant to smut, stem rot, moderately resistant to small spot disease, leaf spot, ear rot, southern rust, and stunting. In 2021, quality analysis by the Crop Quality Supervision and Inspection Test Center of the Ministry of Agriculture and Rural Affairs (Taian): crude protein 10.79%, crude fat 5.21%, lysine 0.23%, crude starch 71.35%.

Production Performance:

In 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; in 2020, the average yield was 776.6 kg/acre in the same trial, a 9.4% increase over Zhengdan 958; and in 2021, the production trial yielded an average of 633.0 kg/acre, also a 9.4% increase over Zhengdan 958. In 2023, the Shandong key project field yielded 1976.8 jin/acre.

Cultivation Techniques Key Points:

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