作物-牲畜综合系统中的养分动态:放养率和氮系统施肥对粪便分解和释放的影响

Agronomy Pub Date : 2024-09-03 DOI:10.3390/agronomy14092009
Marcos Antonio de Bortolli, Tangriani Simioni Assmann, Betania Brum de Bortolli, Marcieli Maccari, Angela Bernardon, Jorge Jamhour, Alan J. Franzluebbers, Andre Brugnara Soares, Igor Kieling Severo
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引用次数: 0

摘要

目前的肥料建议往往忽视了作物轮作中的养分循环。本研究旨在评估作物-牲畜综合系统中高粱、黑燕麦和玉米残留物(omitido)的腐烂率和养分(氮、磷、钾)释放模式。实验采用了基于两种草皮高度(高和低)和两种氮肥水平(氮肥-牧草 200 千克/公顷和氮肥-玉米 0 千克/公顷)的因子处理。每种作物在不同时间间隔收集粪便袋,以测量养分释放模式和分解率。结果表明,牧草高度和氮肥施用对分解和养分释放有显著影响,并影响随后的粮食作物阶段。钾的释放速度快,释放量大。在牧草阶段施氮肥可防止氮和磷固定在黑燕麦残留物中,并减少固定在玉米残留物中。这些发现强调了在施肥策略中考虑养分循环和分解率对提高作物-牲畜综合系统可持续性的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nutrient Dynamics in Integrated Crop–Livestock Systems: Effects of Stocking Rates and Nitrogen System Fertilization on Litter Decomposition and Release
Current fertilizer recommendations often neglect nutrient cycling across crop rotations. This study aimed to assess the decay rate and nutrient (N, P, K) release patterns of sorghum, black oat, and corn residues (omitido) in an integrated crop–livestock system. The experiment used factorial treatments based on two sward heights (high and low) and two nitrogen fertilization levels (N-pasture at 200 kg N ha−1 and N-corn at 0 kg N ha−1). Litter bags were collected at various intervals from each crop to measure nutrient release patterns and decomposition rates. The results showed that pasture height and nitrogen fertilization significantly influenced decomposition and nutrient release, affecting the subsequent grain crop phase. Potassium was released rapidly and in high amounts. Nitrogen fertilization during the pasture phase prevented nitrogen and phosphorus immobilization in black oat residue and reduced immobilization in corn residue. These findings highlight the importance of accounting for nutrient cycling and decomposition rates in fertilization strategies to enhance the sustainability of integrated crop–livestock systems.
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