适量施氮增强盐胁迫下高羊茅生长和抗氧化能力

为土壤盐渍地区高羊茅（Festuca arundinacea）草坪的合理施肥,该研究用NaCl浓度为0,70,140mmol/L和不同NH4NO3水平（质量浓度为0.01,0.6,1.2g/L）对盆栽高羊茅植株进行交互处理,并测定处理后其生长量和抗氧化能力。结果表明,同一水平NH4NO3相比,NaCl胁迫下高羊茅鲜质量、干质量、含水率均低于无NaCl处理;而根系脱氢酶活性、硝酸还原酶（nitratereductase,NR）活性、超氧化物歧化酶（superoxidedismutase,SOD）同工酶活性NO3-含量、质膜透性和丙二醛（malonicdialdehyde,MDA）含量均强于或高于...

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Bibliographic Details
Published in农业工程学报 Vol. 29; no. 15; pp. 126 - 135
Main Author 刘爱荣 张远兵 汪建飞 焦敏 刘晓敏
Format Journal Article
LanguageChinese
Published 安徽科技学院生命科学院,凤阳,233100%安徽科技学院城建与环境学院,凤阳,233100 2013
Subjects
NH4NO3
同工酶
土壤
抗氧化酶
根系脱氢酶
盐份
胁迫
高羊茅
抗氧化酶
盐份
stresses
F. arundinacea
高羊茅
土壤
antioxidative enzymes
NH4NO3
根系脱氢酶
root dehydrogenase
胁迫
同工酶
soils
isozyme
salts
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ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2013.15.016

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Summary:为土壤盐渍地区高羊茅（Festuca arundinacea）草坪的合理施肥,该研究用NaCl浓度为0,70,140mmol/L和不同NH4NO3水平（质量浓度为0.01,0.6,1.2g/L）对盆栽高羊茅植株进行交互处理,并测定处理后其生长量和抗氧化能力。结果表明,同一水平NH4NO3相比,NaCl胁迫下高羊茅鲜质量、干质量、含水率均低于无NaCl处理;而根系脱氢酶活性、硝酸还原酶（nitratereductase,NR）活性、超氧化物歧化酶（superoxidedismutase,SOD）同工酶活性NO3-含量、质膜透性和丙二醛（malonicdialdehyde,MDA）含量均强于或高于无NaCl处理;CAT（catalase,CAT）同工酶活性及蛋白表达量发生改变。同一浓度NaCl胁迫下,随NH4NO3水平增加,其鲜质量、干质量、含水率呈上升趋势;NO3-含量、质膜透性和MDA含量呈下降趋势;SOD同工酶增强;根系脱氢酶活性、NR活性、CAT同工酶活性和蛋白表达量增强幅度明显减弱。因此,与NH4NO30.01g/L相比,NH4NO30.6g/L改善了同浓度盐胁迫下高羊茅氮素营养、抗氧化能力和蛋白质表达量,增强了其耐盐性;而NH4NO31.2g/L能一定程度上改善其氮素营养,但根系主动吸收离子能力、清除H2O2能力和蛋白质表达量增强有限,引起根际环境NH4NO3积累,严重导致土壤次生盐渍化。该研究为盐渍土壤上的高羊茅草坪合理施用NH4NO3提供参考。
Bibliography:11-2047/S
Liu Airong 1 , Zhang Yuanbing 2 , Wang Jianfei 2 , Jiao Min 1 , Liu Xiaomin 1 （1. Life Science College, Anhui Science and Technology University, Fengyang 233100, China; 2. Urban Construction and Environment College, Anhui Science and Technology University, Fengyang 233100, China）
salts; stresses; soils; F. arundinacea; NH4NO3 ; root dehydrogenase; antioxidative enzymes; isozyme
In order to fertilize properly for F. arundinacea cultivated in the soil salinity areas, an experiment was conducted to investigate the effect of NH4NO3 on growth and antioxidative ability of F. arundinaceawas under NaCl stress. F. arundinacea plants cultured with Hoagland nutrient solution （excluding nitrate nutration） in pots was treated with nine cross combinations of different NaCl concentrations at 0, 70, and 140 mmol/L, and three nitrate nitrogen levels at 0.01, 0.6, 1.2 g/L （the nine treatments were 0＋0.01, 70＋0.01, 140＋0.01, 0＋0.6,70＋0.6, 140＋0.6, 0＋1.2, 70＋1.2, 140＋1.2） for 25 days, and then the fresh weight, dry weight
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2013.15.016