R. R. G. Costa, E. Severiano, K. Costa, W. F. Souza, E. Brandstetter, Wayron Araújo de Castro
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引用次数: 5
摘要
本研究的目的是评价不同饲草制度和不同播期农牧结合条件下珍珠粟和巴瓜草生物量的养分循环和积累。试验采用5 × 2因子随机区组设计,3个重复,采用5种饲草制度(单作珍珠粟、单作巴瓜草、珍珠粟与巴瓜草间作、珍珠粟与巴瓜草行间作、珍珠粟与巴瓜草复播和间作),2个播期(2月和3月)。结果表明,单作、行间作或行间间作的巴瓜草在剩余生物量中表现出最高的养分循环和积累。各系统养分积累量的递减顺序为:K > N > Mg > Ca > P > s。钾是生物量积累量最大的养分,且随着分解时间的延长,钾的减少率更高。牧草系统的第一播期导致了更高的养分循环和生物量积累。通过农牧结合的间作系统是一种很有前途的保持养分循环和积累的可持续技术。
Nutrients cycling and accumulation in pearl millet and paiaguas palisadegrass biomass in different forage systems and sowing periods
Developed the study objective of was to evaluate nutrient cycling and accumulation in pearl millet and Paiaguas palisadegrass biomass under different forage systems and sowing periods in integrated crop-livestock. The experiment followed a randomized block design with a 5 × 2 factorial arrangement and three replications, under five forage systems (monocropped pearl millet, monocropped Paiaguas palisadegrass, pearl millet intercropped in rows with Paiaguas palisadegrass, pearl millet intercropped between rows of Paiaguas palisadegrass and pearl millet oversown and intercropped with Paiaguas palisadegrass) and in two sowing periods (February and March). The results showed that Paiaguas palisadegrass monocropped or intercropped in rows or between rows, exhibited the highest nutrient cycling and accumulation in the remaining biomass. Nutrient accumulation the under all of the examined forage systems showed the following decreasing order: K > N > Mg > Ca > P > S. Potassium was the nutrient exhibiting the greatest accumulation in the biomass and it exhibited a higher percent decrease with decomposition time. The first sowing period for the forage systems led to higher nutrient cycling and accumulation in the biomass. Intercropped systems through in integrated crop-livestock showed a promising technique to maintain the nutrient cycling and accumulation with sustainability.