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首页> 外文期刊>Revista Brasileira de Fruticultura >Diagnóstico do estado nutricional de N em porta-enxertos de citros, utilizando-se de teores foliares de clorofila
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Diagnóstico do estado nutricional de N em porta-enxertos de citros, utilizando-se de teores foliares de clorofila

机译：利用叶绿素含量诊断柑橘砧木中氮的营养状况

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The objective of this work was to evaluate chlorophyll content (a+b) on 'Cravo', 'Cleópatra', 'Sunki', 'Volkameriano' and 'Tangelo Orlando' rootstocks in tubes using as indicator on diagnosis by increasing N doses (0; 400; 800; 1,600; 3,200; 4,800 mg N/dm3 of substrate). The chlorophylls content presented righ positive correlation to height, diameter, aerial portion and roots dry matter mass, foliar area and NO3-N content for aerial portion, indicating that the total chlorophyll content can be used as indicator to diagnose N in citrus rootstocks cultivated in tubes. The maximum chlorophylls content estimated in rootstocks 'Tangelo-Orlando', 'Cravo', 'Volkameriano', 'Cleópatra' e 'Sunki' occurred in doses 1,461; 2,386; 2,494; 1,444; and 2,284 (mg N/dm3 of substrate), respectively. Total foliar chlorophyll content adequate for rootstocts of 'Tangelo Orlando' showed to be placed between 1.80 to 3.00 mg of total chlorophyll/dm2 of leaf at 120 days after sowing, for lemon 'Cravo' between 2.46 to 3.94 while the 'Volkameriano' showed to be placed between 2.27 to 4.23 mg of total chlorophyll/dm2 of leaf. Adequate values for foliar contents for total chlorophyll for Cleopatra tangerine showed to be 3.29 to 4.00 mg of total chlorophyll/dm2 of leaf while for 'Sunki' tangerine the values showed to be 1.80 to 3.16 mg of total chlorophyll/dm2 of leaf.
机译：这项工作的目的是评估试管中'Cravo'，'Cleópatra'，'Sunki'，'Volkameriano'和'Tangelo Orlando'砧木的叶绿素含量（a + b），作为通过增加N剂量进行诊断的指标（0 ; 400; 800; 1,600; 3,200; 4,800 mg N / dm3底物）。叶绿素含量与身高，直径，地上部分和根系干物质质量，叶面积和地上部分NO3-N含量呈显着正相关，表明总叶绿素含量可以作为诊断栽培柑橘砧木氮的指标。管。砧木“ Tangelo-Orlando”，“ Cravo”，“ Volkameriano”，“Cleópatra”和“ Sunki”砧木中估计的最大叶绿素含量为1,461; 2,386; 2,494; 1,444;和2,284（mg N / dm3底物）。播种120天后，足以满足“ Tangelo Orlando”根茎的叶面总叶绿素含量在叶片总叶绿素/ dm2的1.80至3.00 mg之间，柠檬“ Cravo”在2.46至3.94之间，而“ Volkameriano”显示放置在叶片总叶绿素/ dm2的2.27至4.23 mg之间。埃及艳后蜜桔的叶绿素总含量的适当值显示为叶片总叶绿素的3.29至4.00 mg / dm2，而'Sunki'蜜桔的叶绿素含量的适当值显示为叶面总叶绿素的1.80至3.16 mg。

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