Ninety finishing pigs were selected to study the effect of N-methyl-aspartate and betaine on the internal growth hormone level in the serum and the correlation
The paper reports the study on validity,absorbing and using in potassium of wine-grapes grown on aeolian sandy soil in Ningxia.The result shows that the content
Twelve litters of new born piglets were divided randomly into groups Ⅰ, Ⅱ, Ⅲ and Ⅳ, and weaned at 17, 21, 28 and 35 days of age, respectively, to determine