期刊论文详细信息
Revista Brasileira de Ciência do Solo
Differential Behavior of Young Eucalyptus Clones in Response to Nitrogen Supply
Eric Victor De Oliveira Ferreira1  Roberto Ferreira Novais1  Greice Leal Pereira1  Nairam Félix De Barros1  Ivo Ribeiro Da Silva1 
关键词: gas exchange;    growth;    nutrient solution;    nutritional efficiency;    crescimento;    eficiência nutricional;    solução nutritiva;    trocas gasosas;   
DOI  :  10.1590/01000683rbcs20140560
来源: SciELO
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【 摘 要 】

Eucalyptus requires large amounts of nitrogen (N); however, it responds in diverse manners to the application of this nutrient. The aim of this study was to evaluate the differential performance in growth, mineral nutrition, and gas exchanges of N-fertilized Eucalyptus clones. The treatments consisted of two Eucalyptus clones (VM-01 and I-144) and six N application rates (0, 0.74, 2.93, 4.39, 5.85, and 8 mmol L-1 NH4NO3) arranged in a randomized complete block design with five replications. VM-01 had greater plant height and greater height/collar diameter ratio, as well as higher leaf concentrations of all macronutrients and of Cu, Fe, Mo, and Zn. In terms of total and root dry matter production, root/shoot ratio, and collar diameter, as well as stomatal conductance and transpiration, I-144 performed better. The performance of the clones was clearly differentiated, and the growth of I-144, despite lower leaf N concentration, was in general better than VM-01.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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