Effect of nitrogen fertilization on the edaphic microflora and some growth indicators and yield of Coffea canephora Pierre growing in an ocric Brown soil without carbonates
Main Article Content
Abstract
activity and some Coffea canephora Pierre growth and
production gauges, cultivated at 3x1.5 m, in an ocric Brown
soil without carbonates was studied during 1996-2000. In a
randomized block design with four replications five nitrogen
fertilization systems were evaluated: No (control), N1 (30, 45
and 50 kg.ha-1.year-1), N3 (90, 135 and 150 kg.ha-1.year-1) and N4 (120, 180 and 200 kg.ha-1.year-1). Annually, 40 kg P2O5 and 50,
100 and 160 kg K2O.ha-1 were applied for the first, second and
third years, respectively. The rhizospheric zone of plants
considered as calculation of the highest nitrogen dressing
systems (N3 and N4) as well as the control (N0) was analyzed
as for the bacterial, fungal and actinomycetal behavior, basal
respiration (Rb), carbon-induced respiration (RIC) and carbon
+ nitrogen-induced respiration (RICN). In March, 1997 and
May, 1999, height (cm) and top diameter (cm) were evaluated.
During 1999-2000, the experiment was harvested and results
were expressed in coffee berry ton.ha-1. Nitrogen response
depended on planting age: for the first year, the dose of
90 kg N.ha-1 guaranteed an adequate growth; from this moment
on, N requirements increased until 135 kg N.ha-1. N
requirements increased in the first year and it was necessary
to apply 150 kg N.ha-1 to achieve 1.17 coffee berry ton.ha-1
production. The fertilization system proposed (N3) did not
provoke decrements on the microbial populations nor in its
soil activities.
Article Details
Those authors who have publications with this journal accept the following terms of the License Attribution-NonCommercial 4.0 International (CC BY-NC 4.0):
You are free to:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial — You may not use the material for commercial purposes.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
The journal is not responsible for the opinions and concepts expressed in the works, they are the sole responsibility of the authors. The Editor, with the assistance of the Editorial Committee, reserves the right to suggest or request advisable or necessary modifications. They are accepted to publish original scientific papers, research results of interest that have not been published or sent to another journal for the same purpose.
The mention of trademarks of equipment, instruments or specific materials is for identification purposes, and there is no promotional commitment in relation to them, neither by the authors nor by the publisher.