Influence of nitrogen application amounts of different scales in small watershed of Three Gorges reserving area on water body;

Investigation on the effects of nitrogen application amount on the growth and production of glehnia littoralis under field condition showed that along with the change of increasing nitrogen amount,the plant height,leaf area index(LAI)and the aboveground dry weight increased.

Late ripen mid-season rice "Tong Yu Jing 1" was used as material to study the influence of nitrogen application amount on yield, quality and effect of rice under shed protection field.

Effects of planting density and nitrogen application rate on soil microbial activity under wheat/forage rape multiple cropping;

Effects of nitrogen application rate and ratio of base and topdressing on nitrogen absorption,utilization,grain yield,and grain protein content in winter wheat;

Effect of nitrogen application rate on morphological and physiological characters of rice dry seedbed seedlings;

Effects of nitrogen fertilizer rate and ratio of base and topdressing on yield of wheat,content of soil nitrate and nitrogen balance;

Effects of nitrogen fertilizer rate and post-anthesis soil water content on yield and quality of high-quality strong gluten wheat;

Effects of nitrogen fertilizer rate and post-anthesis soil water content on characteristics of nitrogen metabolism and grain protein content in wheat;

Effects of nitrogen rate on nitrogen fertilizer use of winter wheat and content of soil nitrate-N under different fertility condition;

Study on the optimum nitrogen rate of flue-cured tobacco in the northern part of Jiangxi Province;

The results showed that planting density and nitrogen rate had a great effect on growth period,main economic characters and the last yield,but the application rate of P and K had a little effect on them.