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当前位置: 首页 > 文章 > 外源氮对盐胁迫下库拉索芦荟幼苗生长和养分含量的影响 园艺学报 2005,32 (4) 663-668
Position: Home > Articles > Supplemental Nitrogen Effects on Growth,Nutrient Content and Quality of Aloe vera Seedlings under Salt Stress Acta Horticulturae Sinica 2005,32 (4) 663-668

外源氮对盐胁迫下库拉索芦荟幼苗生长和养分含量的影响

作  者：
宁建凤;郑青松;刘兆普;邵晶
单  位：
南京农业大学资源与环境科学学院
关键词：
芦荟;盐胁迫;硝酸铵;抗盐性;生长;养分;品质
摘  要：
研究了外源不同浓度硝酸铵对盐胁迫下库拉索芦荟幼苗生长和养分含量的影响。结果表明,外施硝酸铵(3.75~18.75 mmol.L-1)能够显著增加NaC l 200 mmol.L-1胁迫下植株的干质量。随着供氮水平的增加,叶片中氮、磷、钾、游离氨基酸、可溶性糖、可溶性蛋白质和总蒽醌的含量均明显增加,并在外施11.25~15 mmol.L-1硝酸铵时达到最大值;而外施硝酸铵浓度增至18.75 mmol.L-1时,各指标均表现出不同程度的下降。不同叶位叶片各指标含量存在较大差异,上位叶全磷、总蒽醌及可溶性蛋白质的含量较高,中位叶可溶性糖的含量较高,全氮在下位叶积累较多。氮、磷、钾、游离氨基酸、可溶性糖及可溶性蛋白质等含量的增加在某种程度上是外源氮提高了芦荟植株抗盐性的重要原因之一。
译  名：
Supplemental Nitrogen Effects on Growth,Nutrient Content and Quality of Aloe vera Seedlings under Salt Stress
作  者：
Ning Jianfeng,Zheng Qingsong,Liu Zhaopu~*,and Shao Jing (College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China)
关键词：
Aloe vera;Salt stress;Salt tolerance;NH_4NO_3;Growth;Nutrient;Quality
摘  要：
The plant growth reduced in salinity by inhibition in nitrogen,phosphate,potassium uptake,but little study of supplemental nitrogen effects with plant was available.Plant growth and the contents of several nutrient ingredients which included nitrogen,phosphorus,potassium,free amino acids,soluble sugar,soluble protein and total anthraquinone in leaves of Aloe vera seedlings by 200 mmol·L~(-1) NaCl stress with different concentrations of NH_4NO_3 were studied.The results showed that the plant dry mass was increased with the application of NH_4NO_3(3.75-18.75 mmol·L~(-1))under salt stress,i.e.supplemented nitrogen promoted salt tolerace of Aloe vera seedlings. Increased with nitrogen level,content of nitrogen,phosphorus,potassium,free amino acids,soluble sugar,soluble protein and total anthraquinone in leaves were increased obviously and reached the maximum value at 11.25-15 mmol·L~(-1) NH_(4)NO_(3) level while the excessive NH_4NO_3 application(18.75 mmol·L~(-1))led to the negative effect.It appeared distinct difference among different-site leaves for the content of nutritional ingredients.Content of total P,anthraquinone and soluble protein in the upper leaves were higher and the same with soluble sugar in mid leaves,total N in down leaves.Nitrogen,phosphate,potassium increase in Aloe vera leaves with supplemental NH_4NO_3 in salinity played an important role in maintaining ion homeostasis,nutrient content and cell potential,while free amino acids,soluble sugar and soluble protein was significant organ osmoticas in plant responsing to salt stress.In some extent,high salt tolerance of Aloe vera was improved by supplemental N was main caused by the enhancement of N,P,K,free amino acids,soluble sugar and soluble protein content in leaves.

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