Abstract
ABSTRACT The efficiency index (EI) refers to the ratio of nutrients mineralized/made available in the soil to the total amount of nutrients added by organic fertilizer. Therefore, understanding the EI is essential for recommendation of organic fertilization. The aim of this study was to evaluate the availability through mineralization and the efficiency index of nitrogen (N), phosphorus (P), and potassium (K) in organic fertilizers produced from cattle manure. The following treatments were evaluated in an incubation experiment under controlled conditions: [...]
Highlights
Brazil has the largest commercial cattle herd in the world, estimated at 240 million head
The following treatments were evaluated in an incubation experiment under controlled conditions: soil without fertilizer; soil + beef cattle manure vermicompost; soil + beef cattle manure/straw compost; soil + beef cattle manure; soil + dairy cattle manure; and soil + vermicompost produced under conditions of high moisture and forced air
This study aimed to evaluate the mineralization/availability and the efficiency index of N, P, and K in five organic fertilizers from cattle manure
Summary
Brazil has the largest commercial cattle herd in the world, estimated at 240 million head. Of this total, approximately four million are raised in confinement (IBGE, 2010). Cattle manure contains N and P in inorganic and organic forms. The content of these elements is dependent on the source material, degree of maturation, and storage time of the organic fertilizer. It is essential to understand the rates of mineralization and nutrient availability to measure application rates and intervals of fertilizer aiming to synchronize nutrient availability and crop demand, promote maximum use by plants, and avoid losses and environmental contamination
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