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5樓
發(fā)表于 2008-2-1 10:04:33
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只看該作者
我不是很同意樓主的觀點(diǎn)。
為什么不允許散養(yǎng)?美國很多大學(xué)、組織都在推動民眾購買非籠養(yǎng)的雞。歐盟已經(jīng)規(guī)定2012年開始禁止籠養(yǎng)的雞的雞蛋出現(xiàn)在超市上。這是為了動物的福利。
我覺得樓主的出發(fā)點(diǎn)是好的,環(huán)保確實(shí)是一個關(guān)系國家可持續(xù)發(fā)展的一個大事,并且籠養(yǎng)確實(shí)最環(huán)保,可是不許散養(yǎng),擴(kuò)大集約化就有點(diǎn)偏頗了。事實(shí)上,禽類對環(huán)境的壓力并沒有您想象的那么大。如果考慮到動物患病的幾率,考慮到現(xiàn)在的禽流感,我覺得還是不應(yīng)該通過法律手段來禁止散養(yǎng)的。
下面是我在一篇文章中看到的,雖然它也可能是一家之言,但是我部分翻譯出來,供大家參考。翻譯的不好,請見諒。
Chickens and eggs – leaders in energy performance// 18 Jan 2008
題目:雞和雞蛋---能量性能的領(lǐng)導(dǎo)者
It is reported that poultry and eggs are leaders in energy performance for livestock, with the lowest levels of Global Warming Potential (GWP) when compared with beef, pork, lamb.
與牛、豬和羊比較,雞和雞蛋的全球氣候變暖潛在影響最小。
Dr Adrian Williams at Cranfield University, Bedfordshire, UK, has investigated the consumption of primary resources such as minerals and fossil fuels on 10 differing farming systems. This study was a life cycle assessment (LCA) to determine the intensity of the environmental “footprint” that each one generates.
分析10個不同的養(yǎng)殖系統(tǒng)的主要資源的消費(fèi)。通過生命循環(huán)評價來確定每一種系統(tǒng)產(chǎn)生的環(huán)境影響的密度。
According to Dr Williams, poultry and eggs are the leaders in energy performance for livestock, with the lowest levels of Global Warming Potential (GWP) when compared with the performance levels of beef, pork, lamb and wool production.
結(jié)果顯示,與牛、豬和羊比較,雞和雞蛋的全球氣候變暖潛在影響最小
"The sector should give itself a pat on its back," says Dr Williams.
Cage, barn, free-range and organic
比較籠養(yǎng)、普通、散養(yǎng)和有機(jī)養(yǎng)殖方式
The study, which was funded by Defra, also compared the environmental impact of cage, barn, free-range and organic egg production in relation to GWP.
Findings demonstrated a significantly higher energy use associated with organic, free-range and barn egg production, due to greater land requirements for these systems and less efficient feed conversion than that needed by layer hens in cage egg production.
相比籠養(yǎng),其他三種需要特別高的能量。
While the Global Warming potential differs depending on the farming methods, the chicken and the egg are both winners in energy performance, he says. |
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