کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10973686 1108017 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of stocking rate on milk and pasture productivity and supplementary feed use for spring calving pasture fed dairy systems
ترجمه فارسی عنوان
تاثیر میزان جیره گیری بر بهره وری شیر و شیب و استفاده از خوراک افزوده برای سیستم های لبنی پرورش دهی زایشی بهاره
کلمات کلیدی
نرخ بذر پلاتو، تولید شیر، سیستم مبتنی بر مرتع
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
The productivity of grazing systems is primarily limited by the scale and efficiency of systems applied to the grazable land platform adjacent to the milking parlor. The objective of this study was to compare forage production, utilization and quality, milk production, and requirement for supplementary feeds for 2 different grazing platform stocking rate (GPSR) treatments over 4 yr. Animals were randomly allocated to 1 of 2 GPSR treatments: high-closed (HC; 3.1 cows/ha) and high-open (HO; 4.5 cows/ha), which were designed to represent alternative GPSR in a post-European Union milk quota, spring calving, pasture-based milk production system. Animal production data were analyzed using Proc MIXED of SAS with GPSR, year, and parity included as fixed effects in the final model. Within a seasonal spring calving grazing system, at high GPSR and offering moderate amounts of additional supplements based on pasture supply deficits, both systems produced more milk and fat plus protein per hectare in comparison with Irish commercial dairy farms. Although requiring additional supplementation, increased GPSR resulted in increased milk production per hectare but also in an increased requirement for concentrate and forage supplementation during lactation. No significant influence of GPSR was found on body weight and body condition score or reproductive performance during the 4-yr study period. In addition, GPSR also had no effect on pasture production, utilization, or quality during the study period. The strategic use of additional supplements with restricted pasture availability at higher GPSR maintained milk production per cow and significantly increased milk production per hectare.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 99, Issue 7, July 2016, Pages 5904-5915
نویسندگان
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