Effect of nitrogen fertilization and shade type in soil quality and nitrogen assimilation in Ecuadorian Amazon Coffea canephora agroecosystems
| dc.contributor.author | Ibarra L., Rosa E. | |
| dc.contributor.colaborator | Parrado, Carmen | |
| dc.contributor.colaborator | Margenot, Andrew | |
| dc.coverage.spatial | Zamorano | |
| dc.date.accessioned | 2020-11-25T15:05:46Z | |
| dc.date.available | 2020-11-25T15:05:46Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | In the Amazon basin, Robusta (Coffea canephora) is produced in contrasting agroecosystems of low input, shade-based smallholder production, or in intensively managed monoculture plantations that differ in nitrogen (N) availability and productivity. This study aimed to determine whether the shade trees and proper addition of N-fertilizer in coffee plantations may provide soil fertility benefits and contribute to soil quality and crop productivity. Full sun had a positive effect on enzyme activities, potentially mineralizable N (PMN), available ammonium (NH4-N), leaf %N and leaf N:P. Enzyme activities as well as NH4-N were greater under low input, whereas high input yielded greater PMN, leaf N and leaf N:P. Protease was positively associated with PMN (R = 0.60, P = 0.003) but unrelated to the activities of the aminopeptidases, and carbon (C) mineralizing enzymes. Permanganate oxidizable C (POXC) and nitrate (NO3-N) were similar across input and shade managements but more variable under shade relative to full sun. Low input offers limited improvements in soil N cycling increasing by 53% the enzymatic activity and N availability by 31% relative to high input under Robusta coffee production in this region. Whereas, high input improves PMN and Robusta N uptake (Leaf N). Relatively lower response in enzymatic activities, C and N stocks, and leaf N under shade management suggests that although it is a common smallholder practice in this region, leguminous tree-based agroforestry may not close N needs of Robusta as effectively as higher N inputs. | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | https://bdigital.zamorano.edu/handle/11036/6770 | |
| dc.language.iso | eng | |
| dc.publisher | Zamorano: Escuela Agrícola Panamericana, 2020. | |
| dc.relation | 27 p. | |
| dc.rights | Copyright Escuela Agrícola Panamericana, Zamorano, 2020 | |
| dc.rights.accessrights | openAccess | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es | |
| dc.subject | Carbon and nitrogen dynamic | |
| dc.subject | Enzymatic activities | |
| dc.subject | N-mineralizing | |
| dc.subject | Shade-based | |
| dc.title | Effect of nitrogen fertilization and shade type in soil quality and nitrogen assimilation in Ecuadorian Amazon Coffea canephora agroecosystems | |
| dc.type | Thesis |