|本期目录/Table of Contents|

[1]杨君珑,李小伟.模拟氮沉降对干旱半干旱区几种杂草生长及光合特征的影响[J].江苏农业科学,2015,43(12):157-160.
 Yang Junlong,et al.Effects of simulated nitrogen deposition on growth and photosynthetic characteristic of weeds in arid and semiarid area[J].Jiangsu Agricultural Sciences,2015,43(12):157-160.
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模拟氮沉降对干旱半干旱区几种杂草生长
及光合特征的影响
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第43卷
期数:
2015年第12期
页码:
157-160
栏目:
植物保护
出版日期:
2015-12-25

文章信息/Info

Title:
Effects of simulated nitrogen deposition on growth and photosynthetic characteristic of weeds in arid and semiarid area
作者:
杨君珑 李小伟
宁夏大学农学院,宁夏银川 750021
Author(s):
Yang Junlonget al
关键词:
氮沉降杂草生物量光合特征光合途径
Keywords:
-
分类号:
S451
DOI:
-
文献标志码:
A
摘要:
以干旱半干旱区曼陀罗、顶羽菊、龙葵3种C3杂草和杂草藜、反枝苋2种C4杂草为试验材料,以清水、低氮、中氮、高氮4个氮输入水平(0、50、100、150 kg/hm2)模拟氮沉降浓度,研究了模拟氮沉降对不同功能类群杂草生长和光合特征的影响。结果表明,C3草本的株高和单株生物量对氮浓度的响应没有明显规律。在不同氮浓度处理下,C4草本的株高没有显著差异(P>0.05);但低氮浓度提高了单株生物量,中氮、高氮处理则显著抑制了单株生物量积累(P<0.05)。C3草本除了光合速率随氮浓度的增加均显著下降外(P<0.05),其他光合指标(蒸腾速率、气孔导度、胞间CO2浓度和叶绿素含量)均没有明显规律。2个C4草本植物光合特征随氮浓度的变化规律一致,即氮浓度增加提高了叶绿素含量,但不影响其胞间CO2浓度、蒸腾速率和光合速率。结果表明,C3草本对氮素的响应不同,而C4植物表现出更高的氮素耐受性,可以预测氮沉降的增加将改变草本群落的物种组成,且更有利于C4草本物种。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期:2014-12-24
基金项目:宁夏大学科学研究基金(编号:ZR1329);宁夏大学大学生创新创业训练项目(编号:14NXN30)。
作者简介:杨君珑(1980—),男,甘肃庄浪人,讲师,从事森林生态与经营方面的教学研究工作。E-mail:yangjunlong-2002@163.com。
通信作者:李小伟,副教授,主要从事草地生态学与化学计量学方面的研究工作。E-mail:272790494@qq.com。
更新日期/Last Update: 2015-12-25