In spring,summer,autumn 2015,we studied the seasonal variation of phytoplankton community structure in six rivers within Duobukuer Nature Reserve,and made preli
As an important old industrial base in Northeast China,Liaoning Province is facing good opportunities for development in the context of rural tourism booming. T
There are few kinds of fungicides for the prevention and treatment of Rhizoctonia solani,and the excessive use of chemical fungicides can cause many hazards and