Process of nitrogen uptake by rice paddy ecosystem and its economic value.;

Effects of water deficit and nitrogen fertilization on winter wheat growth and nitrogen uptake

this experiment used Anthurium andraeanum as material and studied the effect of matrix moisture content on the growth、development and nitrogen uptake of Anthurium andraeanum.

Characteristics of N uptake and N recommendation for autumn Chinese cabbage in Beijing Suburb;

The results indicated that fresh ear and kernel yield,N uptake,and NUE were significantly different among varieties.

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.

Effect of nitrogen application rate on nitrogen absorption,NO_3-N accumulation in soil and grain yield of winter wheat;

The pot experiments with 9 nitrogen treatments were conducted in 2003—2004 to study the effects of nitrogen application on 12 root traits responsible for morphology and physiological activity and the correlation between the root traits at heading stage and nitrogen absorption in two-line super hybrid rice Liangyou Peijiu.

Effects of different modes of fertilizer N application on nitrogen absorption and yield of direct seeding rice with 15 N tracing technique were studied.

Many experiments have been conducted to investigate N content in wheat plants, N absorption amount, N absorption climax period and the relationship between grain yield and N requirement.

rice varieties were hydroponically cultured in 2001 and 2002 respectively, The tested rice varieties were classified into 6 types based on their yield level by the MinSSw method to investigate the differences of nitrogen uptake and use efficiency among different grain yield types of rice varieties.