植物生态学报 ›› 2010, Vol. 34 ›› Issue (4): 427-437.DOI: 10.3773/j.issn.1005-264x.2010.04.008

• 研究论文 • 上一篇    下一篇

模拟硫酸型、硝酸型及其混合型酸雨对油菜生理特性、生长和产量的影响

麦博儒1, 郑有飞1,2,*(), 吴荣军1, 梁骏1,3, 刘霞4   

  1. 1南京信息工程大学环境科学与工程学院, 南京 210044
    2江苏省气象灾害重点实验室, 南京 210044
    3广西大学农学院, 南宁 530004
    4南京信息工程大学应用气象学院, 南京 210044
  • 收稿日期:2009-07-14 接受日期:2009-12-26 出版日期:2010-07-14 发布日期:2010-04-01
  • 通讯作者: 郑有飞
  • 作者简介:* E-mail: zhengyf@nuist.edu.cn

Effects of simulated sulfur-rich, nitric-rich and mixed acid rain on the physiology, growth and yield of rape (Brassica napus)

MAI Bo-Ru1, ZHENG You-Fei1,2,*(), WU Rong-Jun1, LIANG Jun1,3, LIU Xia4   

  1. 1School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
    2Jiangsu Key Laboratory of Meteorological Disaster, Nanjing 210044, China
    3Agricultural College of Guangxi University, Nanning 530004, China
    4College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China
  • Received:2009-07-14 Accepted:2009-12-26 Online:2010-07-14 Published:2010-04-01
  • Contact: ZHENG You-Fei

摘要:

为了了解我国酸雨污染由硫酸型向硫-硝酸复合型转变所引起的环境效应, 以油菜(Brassica napus)为供试材料, 在大田试验条件下, 系统研究了模拟硫酸型(SAR)、硝酸型(NAR)及其混合型 (MAR) 酸雨对农作物生理特性、生长和产量的影响。结果表明, 3种酸雨胁迫均能抑制油菜生理、生长和产量形成, 但不同类型的酸雨间的抑制效应存在差异。当pH ≤ 4.1时, SAR、NAR、MAR能破坏油菜叶质膜系统、降低光合色素含量及光合速率, 从而抑制作物的光合作用; 当pH ≤ 3.1时, 油菜叶面积减小, 叶受害百分率明显增加。pH = 4.1可作为酸雨对油菜产量的影响阈值。在pH = 7.0-1.5的酸度范围内, 油菜叶片膜透性、丙二醛含量、叶受害百分率表现为NAR > MAR > SAR, 光合速率、光合色素含量、叶面积及产量则表现出SAR > MAR > NAR的变化特征。当pH > 4.1时, 3种酸雨处理间差异均不明显, pH ≤ 3.1时, 3种酸雨间的胁迫效应差异显著增加(p < 0.05), 且酸度越强, 差异越大, 其变化趋势为NAR > MAR > SAR。说明NAR和MAR胁迫对油菜生理、生长及产量的抑制较大。

关键词: 酸雨, 油菜, 生长, 生理特性, 胁迫, 产量

Abstract:

Aims Our objective was to investigate the effect of sulfur acid rain (SAR), nitric acid rain (NAR) and their mixture (MAR) on the physiology, growth and yield of the crop rape (Brassica napus).

Methods Fifteen 4 m × 5 m plots were distributed stochastically for exploring SAR, NAR and MAR stress, with a roughly 0.6 m spacing between plots to avoid interference. We used three replicate treatments of pH = 7.0, 1.5, 3.1, 4.1 and 5.1 and examined growth and development at 5-day intervals from budding to the end of flowering (March 10 to April 25, 2006). On April 12 for the peak period of flowering, we measured leaf cell membrane permeability, contents of malondialdehyde (MDA) and photosynthesis pigment in leaves, photosynthesis speed, leaf injury rate and leaf area as physiological and growth parameters. On May 10, we measured the yield index during the ripening stage.

Important findings These kinds of acid rains can inhibit physiology, growth and yield with effects differing among treatments. At pH ≤ 4.1, SAR, NAR and MAR damage the membrane of rape leaves, decreasing photosynthetic pigment content and photosynthetic speed, thereby diminishing photosynthesis of the crop. For pH ≤3.1, leaf area is decreased and the leaf injury rate increases greatly. The value of pH = 4.1 can be used as the threshold for impact on rape yield. Over the range of pH = 1.5-7.0, leaf membrane permeability, MDA content and leaf injury rate follow the pattern of NAR > MAR > SAR and for the photosynthetic speed, content of photosynthesis pigment, leaf area and yield the order is SAR > MAR > NAR. At pH > 4.1, the differences between these treatments of acid rain are insignificant. For pH ≤ 3.1, the stress differences become large (p < 0.05), with greater differences at stronger acidities, following the pattern NAR > MAR > SAR. This indicates the first two treatments have stronger inhibiting effects on the physiology, growth and yield of rape.

Key words: acid rain, Brassica napus, growth, physiological characteristics, stress, yield