[1]黄保崴,王国君,司东霞,等.黄瓜幼苗根系生长对氮素用量及氮形态的响应[J].黑龙江农业科学,2017,(10):31-36.[doi:10.11942/j.issn1002-2767.2017.10.0031]
　HUANG Bao-wei,WANG Guo-jun,SI Dong-xia,et al.Root Growth of Cucumber Seedlings Response to Nitrogen Application Rates and Nitrogen Forms[J].HEILONGJIANG AGRICULTURAL SCIENCES,2017,(10):31-36.[doi:10.11942/j.issn1002-2767.2017.10.0031]
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黄瓜幼苗根系生长对氮素用量及氮形态的响应

《黑龙江农业科学》[ISSN:1002-2767/CN:23-1204/S] 卷: 期数: 2017年10期 页码: 31-36 栏目: 出版日期: 2017-10-10
Title:
Root Growth of Cucumber Seedlings Response to Nitrogen Application Rates and Nitrogen Forms
文章编号:
1002-2767（2017）10-0031-06
作者:
黄保崴; 王国君; 司东霞; 吕福堂; 李海云
聊城大学 农学院，山东 聊城 252059
Author(s):
HUANG Bao-wei; WANG Guo-jun; SI Dong-xia; LYU Fu-tang; LI Hai-yun
College of Agricultural Sciences,Liaocheng University,Liaocheng，Shandong 252059
关键词:
施氮量; 氮形态; 黄瓜幼苗; 根系
Keywords:
nitrogen application rate;  nitrogen forms;  cucumber seedling;  root system
分类号:
S143；S642.2
DOI:
10.11942/j.issn1002-2767.2017.10.0031
文献标志码:
A
摘要:
为明确黄瓜幼苗根系生长与不同氮素用量及氮形态间的关系，采用盆钵培养的方法，以硝酸铵磷为供试肥料（NO3-N∶NH+4-N为0.9∶1.0），研究不同氮素用量及氮素形态对黄瓜幼苗根系生长的影响。结果表明：不施氮肥的黄瓜幼苗根长高于各施氮处理，施用氮肥植株根系的生长受到抑制，氮素用量100 mg?株-1的情况下，根系生长受到的抑制更为明显；施用氮肥主要降低了根系直径在1.0~1.3 mm和2.3~2.6 mm范围内的根长比例。黄瓜幼苗的根长与播种前和移栽期基质无机氮的含量与形态显著相关。播种前基质NO3-N含量为382 mg?kg-1、NH+4-N含量为373 mg?kg-1、无机氮总量840 mg?kg-1时，根长最小；移栽期，幼苗根长随基质NO3-N含量的增加逐渐降低，基质NH+4-N含量为88 mg?kg-1、无机氮总量为455 mg?kg-1时，对根长的抑制作用最大。播前基质NO3-N/NH+4-N的比值为10.7时，根长最大；移栽期NO3-N/NH+4-N为3.8时，则显著抑制根系生长。
Abstract:
In order to clarify the relationship between root growth of cucumber seedlings and nitrogen application rates and nitrogen forms,ammonium nitrate phosphorus fertilizer as tested material (NO3-N∶NH+4-N0.9∶1.0),a pot experiment was employed to determine the effects of different nitrogen (N) application rates and N forms on root growth of cucumber seedlings.The results showed that the root length of cucumber seedlings without N fertilizer was higher than that of N applied treatments.The growth of plant roots was inhibited with N application,and the inhibition was more obvious when N applied at the rate of 100 mg?plant1.Nitrogen fertilizer mainly reduced the root length in the range of 1.0~1.3 mm and 2.3~2.6 mm root diameter.The root length of cucumber seedlings was significantly correlated with the content of mineral N and N forms in the substrate before sowing and at transplanting.Before sowing,when the content of NO3-N was at 382 mg?kg-1,NH+4-N at 373 mg?kg-1 and total mineral N at 840 mg?kg-1 in substrate significantly reduced root length,and at transplanting,the root length decreased with the content of NO3-N increasing,and when the content of NH+4-N was 88 mg?kg-1 and the total mineral N at 455 mg?kg1,the inhibition of root length was the highest.When the NO3-N/NH+4-N ratio before sowing was 10.7,the root length was the highest,and NO3-N/NH+4-N ratio at transplanting was 3.8,the root growth was inhibited significantly.

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备注/Memo

收稿日期：2017-08-19

?基金项目：山东省自然基金资助项目（ZR2011CM007）；聊城大学大学生创新资助项目（26312158810）
第一作者简介：黄保崴（1994-），男，山东省巨野县人，在读学士，从事园艺工程研究。E-mail：1723538069@qq.com。
通讯作者：司东霞（1969-），女，山东省东阿县人，博士，副教授，从事养分资源管理与植物营养研究。E-mail: sidongxia@126.com。

更新日期/Last Update: 2018-01-31