摘要
采用不同的N、P肥力配比和肥力水平研究其对玉米生长和产量的影响.在不同的施肥模式下,不同的肥力水平和不施肥比较可知:在N∶P=1∶1时,千粒重都有所增加,且在中肥时达到最大值,而低肥和高肥时都有所下降;在N∶P=0.5∶1时,在低肥时千粒重达到最高值,且随着肥力水平的增加玉米产量逐渐增加.两种不同的施肥模式下,地径、苗高、叶片数增长规律相似,施肥比对照(不施肥)都有明显的增长效果.在中肥及以上水平时三项指标变化不大,两种施肥模式在低肥时差异明显.可以看出:在低的N、P比例下增加肥力水平,产量增加显著,N为限制因子.而高的N、P比时,随着肥力水平的增加,产量先增加后降低,P成为限制因子.从经济上讲两种施肥模式下中肥产量较好.本研究可为三峡地区玉米合理施肥提供理论指导.
The effects of different fertilization modes and levels on the growth and production of maize are studied.On the fertilization ratio（N∶P=1∶1） the 1000-grain weight increases on all levels of fertilization compared with the non-fertilization and increases to the maximum on the middle fertilization level,while it decreases on both the low fertilization and high fertilization levels;while on the fertilization ratio（N∶P=0.5∶1） the production increases with higher fertilization levels and the 1000-grain weight gets to the maximum on the low fertilization level.The diameter,shoot height and number of the leaves increase in the similar pattern on different fertilization modes.The fertilization has significant effects on them compared with the non-fertilization.The three indicators have little changes on the middle and higher levels.The two different fertilization modes have significant difference in the low fertilization level.It can be concluded that in low ratio of N and P the production increases with the fertilization level and the N is the limitting factor.While in the high ratio of N and P the production increases at first and decreases,the P becomes the limiting factor.To get high production the fertilization levels should be on the middle level on two different fertilization modes from the economic prospect.The study is to provide theoretical guidance for the proper fertilization of the maize in Three Gorges Region.
出处
《湖北民族学院学报（自然科学版）》
CAS
2010年第1期33-36,共4页
Journal of Hubei Minzu University(Natural Science Edition)
基金
国家科技支撑计划课题(2006BAD29B01)
关键词
玉米
施肥模式
千粒重
生长
产量
maize
fertilization mode
1000-grain weight
growth
grain yield
