Responses of the Lodging Resistance of Summer Maize with Different Gene Types to Plant Density

• DOI: 10.3390/agronomy12010010
• Publication Date: 2021-12-22T15:24:52Z
• Authors: Jinsheng Yang; Wenjie Geng; Jiwang Zhang; Baizhao Ren; Lichun Wang
• Keywords: Stalk

The appropriate increase of planting densities is the key to obtainment high-yield maize (Zea mays L.). However, lodging a major constraint limit grain yield under increased density in present production. Effects population on stalk and agronomic traits were investigated using two cultivars Denghai 618 (DH618, low with spike height) Xianyu335 (XY335, high height). Four levels treatment imposed by 1.5, 6.0, 7.5, 9.0 × 104 plants ha−1. Results showed that bending strength, rind penetration maximum dry weight, internode diameter significantly decreased density. change range XY335 was larger than DH618, showing sensitivity In addition, thickness cortex vascular bundle sclerenchyma cells reduced Compared 1.5 ha−1, above-ground third stem 9.64%, 12.72%, 20.77% for 19.26%, 30.49%, 37.45% at respectively. ha−1 7.75%, 12.44%%, 17.89% 10.18%, 15.21%, 24.73% XY335, compared those Visibly, density, cells, number bundles all decreased, resulting rate. extent variation these parameters short-plant height hybrid less high-plant hybrid, greater indicating has better resistance higher Therefore, can be improved through selection breeding strategies achieving synergistic development diameter, weight per unit, basal internodes.