Thus,formation rate and maximum concentration of new donor can be suppressed by Ge doping in CZ Si,and with increasing the Ge concentration,suppression of new donor is more effective.

Effect of weed and nitrogen application on grain yield of summer maize and nitrogen use in semi-moist field;

Effects of nitrogen application on the yield and quality of Triticale cereale;

The experiments of nitrogen application were conducted with Bromus inermis to study the changes of seed yield in 2002 and 2003.

A field experiment on manual loessial soil was conducted to study the dynamic changes of NO3——N in soil profile,utilization rate of fertilizer N,and relationships between N application rate and soil residual N accumulation during the growth period of summer maize under different N application rates(0,45,90,135,and 180 kg·hm-2).

To understand the N uptake of weeds in wheat field to different N applications and the competition on the N absorption between weeds and wheat,plot trials were carried out in the semi-humid areas.

We examined soil organic carbon, soil N,P responses to manipulations of four treatments: ambient, warming, N application, and warming plus N application during the periods from 2007 to 2008.

Effects of nitrogen fertilization on growth and vivo Cl~- and Na~+ accumulation of winter wheat under NaCl stress;

Effects of nitrogen fertilization application and faba bean/maize intercropping on the spatial and temporal distribution of soil inorganic nitrogen