Study on Absorption and Distribution of Nitrogen Phosphorus and Potassium in Super-High Yield Spring Maize

This experiment systematically studied the regularity of absorption distribution and translocation of N,P,K in spring maize under 15 435 kg/hm2 level.The results showed that the rules of super-high yield spring maize absorbing kinds of nutrient were similar.Before the grain filling period,the absorption quantity of stage and the absorption quantity of day gradually increased with the progress of the growth stage.After the grain filling period,there were some difference in the trend of absorbing nutrient.The absorption quantity of super-high yield spring maize absorbing N and P gradually increased,while the absorption quantity of K gradually decreased.The characteristics of different kinds of organs absorbing every nutrient showed that with the center of growth changing the absorption quantity of organs absorbing N and P were changed,but the change of the absorption quantity of K was not significant different.