Nitrogen forms and soil properties under high plant population of coffee
Soil samples (Yellow-Red Latosol) from 0-10 and 10-30 cm layers under three densities of 4-year-old coffee trees (2500, 7400, and 2000 trees ha-1) were evaluated for their P, K, Ca, Mg and Al contents, and pH. Organic N, mineral N and volatile N evolution was measured in a 14-day incubation and C-mineralization was determined for 30 days in both layers. Results obtained from variance and regression analysis showed that C, N, P, K and mineralized C were not significantly influenced by tree density inboth layers while Al3+, Ca2+, Mg2+ and pH in the 0-10 cm layer were significantly influenced. N and K fertilizing efficiency was greater at 20000 trees ha-1. The 0-10 cm layer showed greater total N content and N-volatile loss, and lower mineral N content.
| Main Authors: | , , , , |
|---|---|
| Format: | biblioteca |
| Published: |
2001
|
| Subjects: | COFFEA, ALUMINIO, CALCIO, CARBON, FERRALSOLES, MAGNESIO, MINERALIZACION, NITROGENO, COMPUESTO ORGANICO DEL NITROGENO, FOSFORO, POTASIO, PROPIEDADES FISICO-QUIMICAS SUELO, QUIMICA DEL SUELO, PH DEL SUELO, TIPOS DE SUELOS, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|