Abstract:

This breakthrough was conventional only heavy use N, P, K fertilizer, through the effects of different levels of P, K, Si fertilizer in the corn seedling cryogenic environment pot experiment, again through the laboratory analysis method was preliminarily studied, identified the different fertilizer levels on the corn seedling various cold-tolerance index effects. The results showed that low temperature stress and nitrogen content, application of P fertilizer fixed, superoxide dismutase (SOD) activity gradually strengthened, which could reduce the membrane permeability, increased dry matter weight. Application of K fertilizer could reduce the average rate of electrolyte, improved oozy and content of soluble sugar. And Si fertilizer could improve the chlorophyll content and reduce absolute electrolyte leakage quantity. Thus at the different content of P and K and Si fertilizer could play a role of corn cold-resistant.