Phosphorus mass cycling and balance in dairy farms: Case studies in Puerto Rico
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- 作者：Teodoro M. Ruiza ; David Sotomayor-Ramí ; rezb ; david.sotomayor@upr.edu" class="auth_mail" title="E-mail the corresponding author ; Carlos Torres-Melé ; ndezc ; Gustavo A. Martí ; nez-Rodriguezd
- 关键词：Whole-farm P balance ; Internal P cycling ; Soil-test P ; Water quality ; Dairy cow P intake
- 刊名：Agriculture, Ecosystems & Environment
- 出版年：2016
- 出版时间：15 March 2016
- 年：2016
- 卷：220
- 期：Complete
- 页码：115-124
- 全文大小：987 K
文摘
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Assessment of whole farm phosphorus (P) balance and internal mass P cycling.
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Dietary P concentrations exceeded more than 60% nutritional recommendations of P.
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Annual P surplus in the two dairy farms between 54 and 59 kg P ha−1.
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Excess P in the animal diet is associated with high P concentration in the feeds.
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Management practices should be implemented to reduce the high on-farm P surplus.