Application of Humus obtained from the Anaerobic Decomposition of Aquatic Plants in the Soil Fertilization of Traditional Cultures of the Amazon

This research aimed to develop a technique for the humus production from anaerobic decomposition of aquatic plants to improve soil fertility in traditional communities in the floodplain Amazon.
Texture and grain size analysis, pH, total organic matter, organic carbon, nitrogen and phosphorous, Na+,K+,Ca2+ and Mg2+ in the soils and humus were determined, and the productivity of the humus in suspended gardens was determined. A diagnosis of the riverside communities was performed.
The results confirmed that the biomass produced by aquatic plants has high nutrients concentrations. The productivity of crop tested was 240 % when using a mixture of humus-soil 1:1, and with others ratios (½:1 and ¼:1) the results were also satisfactory.
This technique of fertilization may be a good alternative, cheep, sustainable and affordable for the traditional communities of the Amazon floodplain.