01904naa a2200229 a 450000100080000000500110000800800410001902400570006010000260011724500770014326000090022052011920022965000290142165300130145065300280146365300130149165300260150470000230153070000230155370000210157677300770159719749182023-05-12       2013    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/j.micromeso.2012.06.0512DOI1 aBERNARDI, A. C. de C.  aBrazilian sedimentary zeolite use in agriculture.h[electronic resource]  c2013  aThis report describes the characterization and application of the Brazilian zeolitic sedimentary rocks as a slow plant-nutrient fertilizer and soil conditioner. The characterization of the head samples showed that it is composed of the zeolite stilbite intertwined with a smectic clay mineral, mixed with quartz. A low-cost quartz separation gravitational technique was used to concentrate the mineral. An enrichment of concentrated natural zeolite was carried out by adding KNO3, K2HPO4 and H3PO4 + apatite. These materials were tested with Rangpur lime rootstock and other with four successive crops grown on the same substrate: lettuce, tomato, rice, and Andropogon grass. The results indicated that N, P and K enriched zeolite was an adequate slow-release source of nutrients to plants increasing 20% of crop production and also improving products quality. Other green house and field experiments with concentrated zeolite applied with urea showed 8% of reduction on losses of ammonia volatilization and improving 5% the corn dry matter yield. Concentrated zeolite used as a sand soil amendment also increased at least 10% of soil water retention and 15% of available water capacity.  aavailable water capacity  aN losses  aSlow release fertilizer  aStilbite  aWater retention curve1 aOLIVEIRA, P. P. A.1 aMONTE, M. B. de M.1 aSOUZA-BARROS, F.  tMicroporous and Mesoporous Materialsgv. 167, n. 1, p. 16-21, feb. 2013.