超高产春玉米氮磷钾的吸收与分配

采用田间试验的方法,在供试玉米产量15 435 kg/hm2的超高产水平下,对春玉米氮、磷、钾吸收、分配与转移规律进行了系统研究。结果表明:在灌浆期前,超高产春玉米对氮、磷、钾养分吸收规律变化较为相似,即阶段吸收量和日均吸收量随生育时期的推进逐渐增大;而灌浆期后,植株对氮、磷、钾养分吸收趋势出现显著差异,即氮、磷吸收持续增高,钾吸收迅速下降。养分在各器官体内的分配特点体现在氮、磷分配随生长中心的转移而发生变化,而钾向生长中心的转移变化不明显。

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.