This project has by objective the quantification of water and nutrient fluxes in an experimental plantation, which is composed of different monoculture and polyculture systems with mainly perennial crops, as well as in primary and secondary forest at EMBRAPA-CPAA (Manaus, AM, Brasil). The flux measurements are expected to provide information about the efficiency with which the different land use systems exploit the available resources (water, nutrients) on the infertile soils of the area and minimize unproductive losses, e.g., through leaching. Efficient resource utilization is seem as a procondition of sustainable land use on this site.bitstream/item/180848/1/ID-4004-2.pdfAnnual Report 1995. BMF N.00396641 5

SHIFT PROJECT ENV 45 (Manaus-AM).

English

This project has by objective the quantification of water and nutrient fluxes in an experimental plantation, which is composed of different monoculture and polyculture systems with mainly perennial crops, as well as in primary and secondary forest at EMBRAPA-CPAA (Manaus, AM, Brasil). The flux measurements are expected to provide information about the efficiency with which the different land use systems exploit the available resources (water, nutrients) on the infertile soils of the area and minimize unproductive losses, e.g., through leaching. Efficient resource utilization is seem as a procondition of sustainable land use on this site.Annual Report 1995. BMF N.00396641 5

Infoteca-e

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.

This is the third annual report of the project summarizing the results of 1997. The results of the biomass determination and nutrient uptake are included which were conducted during 1996/97. First results from stand hydrology (stemflow, throughfall) and soil nitrogen dynamics are incorporated. The report is devided into two parts. In the main part, the project team is presented and is activities throughout the year 1997 are briefly summarized. The annexes give detailed information on selected research activities of the project. The research programme could be conducted according to the schedule outlined in previous report. This detailed and integrated analyses of the soil nutrient and water dynamics is yet to be done. This will involve mathematical procedures which can only be employed after thorough data analyses. First organisational and scientific steps were made towards implementing the new project phase starting in 1998.Annual Report 1997. Ed. by Johannes Lehmann

The experiments started during the first year of the second phase of this project were continued, such as studies about the effect of trees on soil phosphorus and sulfur abailability, dissolved organic nutrients in rainfall, throughfall, stemflow and soil solution. Additionally, we focussed on the effects of cover crops on tree nutrition, soil nutrient and water dynamics. Soil nitrogen and phosphorus uptake was investigated using different N-15 and P-32 tracer experiments. The fate of fertilizer nitrogen was studied with N-15 labelled ammoniumsulfate in plant, soil, soil extracts and soil solution. In laboratory incubations, the effect of leaf quality on decomposition and incorporation of nutrients into soil organic matter was studied as affected by soil microbes and soil fauna.Annual Report 1999. Compiled by Johannes Lehmann and Klaus Kaiser

SHIFT PROJECT ENV 45/2.

This second annual report of the project summarizes the activities between January and December 1996. During this year, the project left the preparotory stage of purchasing, importing and installing equipment and entered into the stage of routine data collection and analysis.The report is divided into two parts. In the main part, the project team is presented and its acitivities during the year 1996 are briefly summarized. The annexes give detailed accounts of selected research acitivities of the project. Despite numerous problems, all project activities were in principle successful, and there were no major changes to the time plan of the project. The root distribution studies were completed. Significant progress was made in soil physical studies, soil solution and rainwater analyses and stand hydrology (stemflow, throughfall). The laboratory analysis at Manaus faced no major problems. Two visiting scientists carried out supplementary studies (role of invisible leaf wetness films in nutrient uptake) and gave technical and scientific assistance in the equipment of the soil physics laboratory, software installation and use and in the development of the soil physical field measurement program.SHIFT Project ENV 45. Annual Report 1996

SHIFT PROJECT ENV 45.

In this study, we present the effects of different fruit and timber tree species in a multistrata agroforestry system in comparison to secondary vegetation and primary forest sites on inorganic and organic P pools of a Ferralsol in the Amazon basin. The S pools were also assessed, but could not be presented here due to the length of this contribution.Annual Report 1998. Edited by Johannes Lehmann and Klaus Kaiser

http://www.infoteca.cnptia.embrapa.br/bitstream/doc/669428/1/Waterandnutrientfluxes...pdf

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.

Abstract

Similar works

Full text

Available Versions

Infoteca-e

Infoteca-e

Infoteca-e

Infoteca-e

Infoteca-e