季节对育成母牛产粪量及粪N、P、Cu、Zn等污染物排放量的影响
계절대육성모우산분량급분N、P、Cu、Zn등오염물배방량적영향
Study on the Effect of Produce Faecal Output and N, P, Cu and Zn Pollutant Excretion in Growing Cow Faecal on Season
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