摘要： 利用盆栽试验，研究不同氮肥用量对春小麦中前期生长情况的影响。结果表明，施用氮肥促进了小麦的生长发育，使小麦的株高、茎基宽、分蘖数、茎叶干重等生长量提高0.05~1倍，但增长并不与氮肥用量同步。在分蘖期和拔节期，施氮处理的小麦茎叶中全N含量均高于不施氮处理，而全P、全K含量随着施氮量的增加呈现先增后减的趋势。在分蘖期和拔节期，小麦茎基部NO₃^-_N含量、叶片中叶绿素含量与施氮量之间均有显著正相关性，小麦茎基部NO₃^-_N含量、叶片中叶绿素的含量可以反映出土壤的供氮水平。

关键词: 春小麦, 氮, 分蘖期, 拔节期

Abstract: Effect of Different Nitrogen application on early and middle Growth of Spring Wheat by pot cultivation.The results showed that:nitrogenous fertilizer could promote the growth of spring wheat.Plant height,stem width,tiller number,dry weight of stem and leaf increased 5% to 100% compared with the control treatment,nevertheless it doesn't show a linear relationship between the increase of wheat and the nitrogenous fertilizer applied amount all the time.In tillering and elongating stages,compared with control treatment,applying nitrogen increases the total N content in stem and leaf of wheat.The total P,K content increased first,and then with the increasing of N applied it presented a decreasing trend in stem and leaf.In addition,both of NO₃^-_N content in stem radix and leaf chlorophyll content show a distinct positive correlation with N applied amount,so they can reflect the N supply level of soil.

Key words: Spring Wheat, Nitrogen, Tillering stage, Elongating stage

中图分类号: 

• S143.1