02084nam a2200361 a 450000100080000000500110000800800410001910000170006024500820007726001280015930000110028752010360029865000170133465000130135165000220136465000160138665000220140265000260142465000260145065000210147665000330149765000290153065000210155965000170158065300170159765300130161465300110162765300110163865300190164970000190166870000190168770000160170616700142022-04-05       2000    bl uuuu     u00u1 u    #d1 aLIEBEREI, R.  aCharacteristics of sustainable polyculture production systems on terra firme.  aIn: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS, 2000, Hamburg. Programa and abstracts... Hamburg: Universityc2000  ap. 96.  aThe combination of soil science, forestry, agronomy and biology allowed an analytical comparison of various experimental mixed culture systems. From these studies, a descriptor system was developed which allows to understand the contribution of each plant species to nutrient cycling, water distribution, litter formation, overall biomass production and crop production. This knowledge allows to combine plants so that their properties interact to form a system, which minimizes mineral losses and which regulates air humidity and water distribution and thus leads to stable crop production. The general conclusion which can be drawn after eight years of polyculture study is: a) stable productions systems for samllholder families have bee developed; b) the systems are variable; they can be adapted to the respective site conditions; c) the manager of these plantations requires a deeper understanding of the cultivation systems and an intensive dissemination of knowledge and a well develope on-farm training system for farmers.  aagroforestry  aland use  amultiple cropping  asmall farms  asoil conservation  atropical rain forests  aConservação do Solo  aCultivo Multiplo  aDesenvolvimento Sustentável  aFloresta Tropical Úmida  aPequeno Produtor  aUso da Terra  aAgrofloresta  aAmazonas  aBrasil  aManaus  aSustainability1 aGASPAROTTO, L.1 aPREISINGER, H.1 aSCHROTH, G.