Monitoring and analysis on population and seasonal fluctuation of cockroaches

Objective To study the distribution,population density and seasonal fluctuation of rat in large water-scale rubbish field,nearby village and on contrast spot.

Objective: To study the species,composition and seasonal fluctuation of Rattus losea and it s parasitical fleas,and provide with the evidences for the policy made in Hepu county of Guangxi.

Rodent density investigation and seasonal dynamics in Wuxi city;

Analyzing on the Population Distribution and Seasonal Variation of Plague Host Animal in Yingjiang county,Yunnan;

Investigation on seasonal variation of cockroach density indoor in Suzhou urban districts;

The densities and seasonal variation of the flies in Wuyishan city;

With the Round Distribution Method to Probe the Seasonal Change of Flies;

Investigation on population distribution and seasonal change of flies in Yancheng city;

In order to determine the proportion of the root respiration to the total soil respiration,field experiments were condusted to measured soil respiration in three temperate grassland communities including Leymus chinensis free-grazed steppe,stipa grandis free-grazed steppe and Leymus chinensis degenerated free-grazed steppe using root biomass ratiocination method in the growing season,2005.

The sap flow velocity of Elaeagnus angustifolia was continuously measured during growing season by using heat pulse meter.

For recent years, the research has showed that there is a gradual lengthening of the growing season in the Northern Hemisphere.