Adubação verde com ingá (inga edulis) em solo latossolo amarelo de quintais agroflorestais na Amazônia Central
The amazonian homegardens on terra firme are in general placed on distrofic soils with aluminum toxicity, with high acidity, and progressive decline of productivity, due to low resources availability. The experiment was developed to evaluate manuring forms between five treatments: control, chemic...
| Autor principal: | Abib, Mauricio Cesar Sinicio |
|---|---|
| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
|
| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/5322 http://lattes.cnpq.br/4938454039581092 |
| Resumo: |
|---|
|
The amazonian homegardens on terra firme are in general placed on distrofic soils with
aluminum toxicity, with high acidity, and progressive decline of productivity, due to
low resources availability. The experiment was developed to evaluate manuring forms
between five treatments: control, chemical fertilization and deposition of pruned
biomass of ingá (Inga edulis) with 3,69% N, in the recommendations of 15, 30 and 45 t
ha-1, applied in plots of 40 m2. The soil’s chemical characteristics were accompanied in
three samplings, in the beginning, 4 and 6 months after the application of the treatments,
in the depths 0-10 and 10-20 cm. The chemical fertilization was constituted by N, P, K,
calcined dolomite and micronutrients in FTE form. Jucá (Libidibia ferrea var. ferrea)
were used as indicative plants, harvested in lines inside the plots with 1,5 m among
plants. The experiment was arranged in randomized blocks in factorial arrangement 5 x
3 x 2, considering manuring forms, period and soil’s depth, with three replicates. The
growth of jucá was accompanied by height measures, basis diameter and monthly
estimates of growth, with randomized block and three replicates of 4 plants. After six
months of 45 t ha-1 of inga’s pruned biomass application, it was identified an increase of
nutrients availability in the soil, with reduction of acidity and Al3+ toxicity. The C:N
ratio medium values of 10,63 supported mineralization processes. The initial benefits to
the soil’s depths of 0-10 and 10-20 cm showed normal distribution as expected. Jucá’s
growth evidenced the benefits of cover green manuring practice. In six months, the jucá
plants presented larger growth in height and basis diameter, with monthly increment of
height growth of 12,5 cm month-1 in the plots that received higher amounts of green
manure. In the succeeding months, the conventional chemical fertilization promoted
effects comparable with the 45 t ha-1 green manure of ingá biomass, although its
localized distribution when applied in crowning, disregards the potential of
homogeneous liberation of nutrients to the soil wich received organic matter. The
homegardens researched presented agrobiodiversity resources commonly maintained by
farmers, wich the most occurring botanical families were Anacardiaceae and Arecaceae,
prevailing the native ones, with emphasis to the fruit trees cupuaçu and mari. |