Effects of endogenous regulation of feed intake in pigs;

Environmental conditions and exterior regulations have great effect on synthesis and activity of the key enzymes of white rot fungi, and they affect degradating effic.

This article started with the geographical environment basis of dividing administrative district,discussed the interactive relationship between resource object exploited in ancient China and the administrative division that had completed gradually,showing that the resource regulation was the main line that run through the dividing of administrative district in ancient China.