nit rogen fixation 第1页

ASSOCIATION NITROGEN FIXATION OF RICE INOCULATED WITH AMMONIA RESISTANT ENGINEERING STRAIN( Alcaligenes faecalis ) USE OF ~( 15) N DILUTION METHOD FOR SCREENING SOYBEAN LINES WITH HIGH YIELD AND HIGH NITROGEN FIXATION ABILITY THE EFFECT OF DIFFERENT LEVELS OF FERTILIZER ON NITROGEN NUTRIENT OF PASTURE USING ~(15)N-ISOTOPE DILUTION METHOD Cellular Structure of Root Nodules of Elaeagnus conferta Roxb. and Nitrogen Fixation Activity