کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
73728 | 49070 | 2013 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Brazilian sedimentary zeolite use in agriculture Brazilian sedimentary zeolite use in agriculture](/preview/png/73728.png)
This 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.
Zeolite–stilbite improving the efficiency of nutrient use by increasing the availability of phosphorus from phosphate rock and decreasing ammonia volatilization from urea.Figure optionsDownload as PowerPoint slideHighlights
► NPK enriched zeolite was an adequate slow-release fertilizer.
► Stilbite with urea reduced NH3 volatilization and improved NUE.
► Stilbite increased soil water retention and availability.
Journal: Microporous and Mesoporous Materials - Volume 167, February 2013, Pages 16–21