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首页> 外文期刊>Brazilian Archives of Biology and Technology >N sources affect growth, nutrient content, and net photosynthesis in maté (Ilex paraguariensis St. Hil.)
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N sources affect growth, nutrient content, and net photosynthesis in maté (Ilex paraguariensis St. Hil.)

机译：氮源影响遮罩的生长，养分含量和净光合作用（巴拉圭冬青树）

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The influence of different N sources on the growth of maté (Ilex paragurariensis St.Hil.) seedlings grown in greenhouse was studied. All seedlings received a base fertilization of 10 mg N.kg-1 soil as NH4NO3, 60 mg P2O5.and 40 mg K2O.kg-1 soil as KH2PO4 15 days before treatments application. Treatments were as follow: Control, with no extra N added; Urea = 100 mg N.kg-1 soil as Urea; NO3- = 100 mg N.kg-1 soil as Ca(NO3)2; and NH4+ = 100 mg N.kg-1 soil as (NH4)2SO4. It was concluded that: 1) increasing N content in leaves alone was not able to promote gain in biomass production of maté seedlings; 2) seedlings receiving N-NH4 showed a higher accumulation of P and Mg on shoot biomass; and 3) an increase in leaf area, leaf number and net photosynthesis observed at the N-NH4 treatment was coincident with an increasing absorption of P and Mg.
机译：研究了不同氮源对温室温室maté（Ilex paragurariensis St.Hil。）幼苗生长的影响。在施药前15天，所有幼苗均需以10 mg N.kg-1土壤作为NH4NO3、60 mg P2O5。和40 mg K2O.kg-1土壤作为KH2PO4的基础施肥。处理如下：对照，不添加额外的N;尿素= 100毫克N.kg-1土壤作为尿素; NO3- = 100 mg N.kg-1土壤，以Ca（NO3）2表示; NH4 + = 100 mg N.kg-1土壤，形式为（NH4）2SO4。结论是：1）仅叶片中氮含量的增加并不能促进哑光幼苗生物量的获得。 2）接受N-NH4的幼苗在茎生物量上表现出较高的P和Mg积累; 3）在N-NH4处理下观察到的叶面积，叶数和净光合作用的增加与P和Mg吸收的增加同时发生。

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