The total content of light rare earth elements( LREEs) in the soil of navel orange orchards of Gannan area is greater than that of heavy rare earth elements( HREEs). Appropriate content of LREE can not only promote th...The total content of light rare earth elements( LREEs) in the soil of navel orange orchards of Gannan area is greater than that of heavy rare earth elements( HREEs). Appropriate content of LREE can not only promote the growth of navel oranges,and it is also conducive to human health. On the basis of exploring the correlations between the content of LREE in the soil of navel orange orchards of Gannan area and the contents of LREE in navel orange leaves and fruit,the influence mechanism of LREEs on the quality of navel oranges was revealed. In this study,with two Newhall navel orange orchards with different soil LREEs background levels in Xinfeng County as the research object,the changes in the content of LREE( lanthanum,La; cerium,Ce; praseodymium,Pr; neodymium,Nd) in leaves and fruit of navel orange at different growth stages were analyzed using Inductively Coupled Plasma-Mass Spectrometry( ICP-MS),and the correlations between the content of LREE in the soil,navel orange leaves and navel orange fruit were studied. The results showed that the contents of the four kinds of LREEs in the soil ranked as Ce > La > Nd > Pr,and there were significant differences among them( P < 0. 01). Navel orange leaves and fruit have selective and heterogenic absorption for LREEs. At different growth stages,La showed the highest accumulation amount in the leaves and fruit of navel orange; and the content of LREE in the leaves of navel orange increased first and then decreased,while that in the fruit of navel orange showed continuous decrease. During the migration of LREEs from soil to leaves to fruit,the content of LREE decreased rapidly as the migration distance increased. The accumulation amount of LREE in navel orange was positively correlated with the content of LREE in the soil. The correlation between the content of LREE in the leaves and fruit of navel orange was greatest. Among the four kinds of LREEs,the correlation of La was greatest,followed by Ce,indicating that the accumulation amount of LREE in the navel orange body was affected by the element types.展开更多
以纽荷尔脐橙为试材,于2010年测定了福建上杭县新元果业和绿然生态农庄脐橙果园区两样地种植8年和13年相应园区土壤营养状况、土壤微生物及脐橙果实品质。结果表明:随着种植年限的增加,两样地土壤中只有速效K的含量呈显著上升趋势,TN、...以纽荷尔脐橙为试材,于2010年测定了福建上杭县新元果业和绿然生态农庄脐橙果园区两样地种植8年和13年相应园区土壤营养状况、土壤微生物及脐橙果实品质。结果表明:随着种植年限的增加,两样地土壤中只有速效K的含量呈显著上升趋势,TN、水解性N、TP、速效P、有机质的含量变化趋势不一致,交换性Ca、交换性Mg、有效S差异不显著,两种植年限土壤除了pH值低于适宜指标外,其余各元素均在适宜指标范围内;除了8年种龄的样地Ⅰ外,两样地其余处理的PLFAs种类、生物标记i 16∶01,4∶02,0∶01,5∶0,a15∶0,10 Me 16∶0,10 Me18∶0等的相对生物量均显著高于对照;样地Ⅱ生态指数中优势度指数Simpson、丰富度Shannon、多样性指数McIntosh等均显著高于对照;随着树龄的增加,两样地脐橙果实总糖、还原糖、可溶性固型物含量均显著上升趋势,Vc、总酸、糖酸比、固酸比变化趋势不一致,单果重、可食率、果型指数差异不显著。展开更多
基金Supported by National Natural Science Foundation of China(31760551)Jiangxi Natural Science Foundation(20152ACB21002)Collaborative Innovation Special Funds of Jiangxi Academy of Sciences(2013-XTPH1-05)
文摘The total content of light rare earth elements( LREEs) in the soil of navel orange orchards of Gannan area is greater than that of heavy rare earth elements( HREEs). Appropriate content of LREE can not only promote the growth of navel oranges,and it is also conducive to human health. On the basis of exploring the correlations between the content of LREE in the soil of navel orange orchards of Gannan area and the contents of LREE in navel orange leaves and fruit,the influence mechanism of LREEs on the quality of navel oranges was revealed. In this study,with two Newhall navel orange orchards with different soil LREEs background levels in Xinfeng County as the research object,the changes in the content of LREE( lanthanum,La; cerium,Ce; praseodymium,Pr; neodymium,Nd) in leaves and fruit of navel orange at different growth stages were analyzed using Inductively Coupled Plasma-Mass Spectrometry( ICP-MS),and the correlations between the content of LREE in the soil,navel orange leaves and navel orange fruit were studied. The results showed that the contents of the four kinds of LREEs in the soil ranked as Ce > La > Nd > Pr,and there were significant differences among them( P < 0. 01). Navel orange leaves and fruit have selective and heterogenic absorption for LREEs. At different growth stages,La showed the highest accumulation amount in the leaves and fruit of navel orange; and the content of LREE in the leaves of navel orange increased first and then decreased,while that in the fruit of navel orange showed continuous decrease. During the migration of LREEs from soil to leaves to fruit,the content of LREE decreased rapidly as the migration distance increased. The accumulation amount of LREE in navel orange was positively correlated with the content of LREE in the soil. The correlation between the content of LREE in the leaves and fruit of navel orange was greatest. Among the four kinds of LREEs,the correlation of La was greatest,followed by Ce,indicating that the accumulation amount of LREE in the navel orange body was affected by the element types.
文摘以纽荷尔脐橙为试材,于2010年测定了福建上杭县新元果业和绿然生态农庄脐橙果园区两样地种植8年和13年相应园区土壤营养状况、土壤微生物及脐橙果实品质。结果表明:随着种植年限的增加,两样地土壤中只有速效K的含量呈显著上升趋势,TN、水解性N、TP、速效P、有机质的含量变化趋势不一致,交换性Ca、交换性Mg、有效S差异不显著,两种植年限土壤除了pH值低于适宜指标外,其余各元素均在适宜指标范围内;除了8年种龄的样地Ⅰ外,两样地其余处理的PLFAs种类、生物标记i 16∶01,4∶02,0∶01,5∶0,a15∶0,10 Me 16∶0,10 Me18∶0等的相对生物量均显著高于对照;样地Ⅱ生态指数中优势度指数Simpson、丰富度Shannon、多样性指数McIntosh等均显著高于对照;随着树龄的增加,两样地脐橙果实总糖、还原糖、可溶性固型物含量均显著上升趋势,Vc、总酸、糖酸比、固酸比变化趋势不一致,单果重、可食率、果型指数差异不显著。
