Dry Matter Production and Photosynthesis Characteristics of Three Hybrids of Maize (Zea mays L.) with Super-High-Yielding Potential Effects of seed dressing with imidacloprid on the seedlings growth and protective enzyme activities of high-yielding summer maize. Effects of DA-6 on leaf photosynthetic carboxylase and protective enzyme activities and grain yield of high-yielding summer maize.