Photosynthetic parameters of young Brazil nut (Bertholletia excelsa H. B.) plants subjected to fertilization in a degraded area in Central Amazonia

Title:

Photosynthetic parameters of young Brazil nut (Bertholletia excelsa H. B.) plants subjected to fertilization in a degraded area in Central Amazonia

Creator:

Ferreira, M. J., Gonçalves, J. F. C., and Ferraz, J. B. S.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d40f06e4-1c89-4304-a04e-dccfae257a4c
uuid:d40f06e4-1c89-4304-a04e-dccfae257a4c
issn:0300-3604
doi:10.1007/s11099-009-0088-2

Subject:

chlorophyll a fluorescence, chloroplast pigment contents, forest restoration, green fertilization, performance index, and photosynthesis

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In an experimental site for reforestation of degraded area, three-year-old plants of Bertholletia excelsa Humb. & Bonpl. were subjected to different fertilization treatments: T0 = unfertilized control, T1 = green fertilization (branches and leaves) and T2 = chemical fertilization. Higher net photosynthetic rates (PN) were observed in T1 [13.2±1.0 μmol(CO2) m-2 s-1] compared to T2 [8.0±1.8 μmol(CO2) m-2 s-1] and T0 [4.8±1.3 μmol(CO2) m-2 s-1]. Stomatal conductance (g s), transpiration rate (E) and water use efficiency (WUE) of individuals of T1 and T2 did not differ significantly, however, they were by 88, 55 and 63%, respectively, higher in T1 than in the control. The mean values of variable fluorescence (Fv), performance index (P.I.) and total chlorophyll [Chl (a+b)] were higher in T1. Our results indicate that green fertilization improves photosynthetic structure and function in plants of B. excelsa in young phase. and M. J. Ferreira, J. F. C. Gonçalves, J. B. S. Ferraz.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

616-620

Source:

Photosynthetica | 2009 Volume:47 | Number:4

Harvested from:

CDK

Metadata only:

false