Energy and economic values of greenhouse sheds to replace winter grazing in north-western China

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Abstract

To demonstrate that winter grazing in northwestern China is counterproductiveto animal production, 40 ewes from two farms were kept throughout awinter inside makeshift greenhouse sheds while another 40 ewes were left grazingin the traditional manner. Results show that the average temperature insidethe greenhouse was 10, 14 and 4°C higher than outside at 9 am, 12 noon and9 pm, respectively (all P < 0.001), and that ewes inside the greenhouse lost3 kg less bodyweight than those outside (P < 0.001). An analysis using theauthors'€™ bioeconomic model suggests that the proposed method can save2.4 MJ day 1;/ head of metabolizable energy and, at the gross economic benefitof 1191 yuan or $189 year, the initial cost of 3000 yuan or $477 can bepaid off within three seasons.
Original languageEnglish
Pages (from-to)156-159
Number of pages4
JournalGrassland Science
Volume59
Issue number3
DOIs
Publication statusPublished - Sep 2013

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