Nitrogen and phosphorus utilisation and excretion in dairy buffalo intensive breeding

Italian Journal of Animal Science

Angela Salzano¹  Anna Balestrieri¹  Bianca Gasparrini¹  Monica Isabella Cutrignelli¹  Gianluca Neglia¹  Giovanna Bifulco¹  Giuseppe Campanile¹  Ettore Varricchio²  Roberta Cimmino²  Michael John D'Occhio³ 

[1] Dipartimento di Medicina Veterinaria eProduzioni Animali, Università di NapoliFederico II, Napoli;Dipartimento di Scienze e Tecnologie,Università del Sannio, Benevento;Faculty of Agriculture and Environment,The University of Sydney, Camden;

关键词: Dairy buffalo, Feed efficiency, Crude protein, Nitrogen, Phosphorus;   

DOI  :  10.4081/ijas.2014.3362

来源: DOAJ

【 摘 要 】

The aim of this study was to quantify nitrogen (N) and phosphorus (P) utilisation and excretion in intensive dairy buffaloes. Italian Mediterranean buffaloes were divided into 4 groups (n=6/group) as follows: Groups M50, M125 and M225 at 50, 125 and 225 days of lactation, respectively, and Group NL which was non-lactating. Lactating buffaloes had greater (P<0.05) dry matter and organic matter intake than NL buffaloes. Buffaloes in Group M50 had a lower (P<0.05) crude protein (CP) apparent digestibility than buffaloes in Groups M125 and M225. Group NL had a higher (P<0.01) real CP digestibility than Group M50. Buffaloes in Groups M50 and NL had a negative N balance (-79 and -12 g, respectively) whilst buffaloes in Groups M125 and M225 had a positive N balance (26 and 16 g, respectively). Buffaloes in Group M50 had more (P<0.05) N in urine (204 g) than Group NL (87 g). Buffaloes in Group NL had less (P<0.01) P in both faeces (12.9 g) and urine (0.8 g) compared with the three groups of lactating buffaloes combined (25 g in faeces and 12 g in urine) and they also had greater (P<0.05) P digestibility (68%) than lactating buffaloes combined (43%). The present study has shown that buffaloes have a relatively high efficiency of N and P utilisation.

【 授权许可】

Unknown