Abstract: A field experiment was conducted to investigate effects of inoculation of fababean with rhizobium GS374 on N nutrition in a fababean/ maize intercropping system receiving nil or 225 kg/ ha N. Results showed that biomass or grain yield of fababean and maize in treatment N0 was significantly improved by fababean inoculation rhizobium GS374 compared with the check. However,it was not so in treatment N225. Total biomass or grain yield of the fababean/ maize in2 tercropping system in treatment N0 where fababean was inoculated with rhizobium was similar to those in treatment N225 where fababean was not inoculated with rhizobium. In the fababean/ maize intercropping system, shoot N content of fababean or maize and total N,NO3 - 2N,NH4 +2N content of 0 - 20 cm soil were not markedly increased by rhizobium in2 oculation compared with the check regardless of whether receiving nil or 225 kg/ ha N,but the total shoot N uptake in the intercropping system was significantly improved by rhizobium inoculation. In other words,in treatment N0 and N225,the ef2 fect of inoculation on total shoot N uptake in the intercropping system was significant,increasing by 1915 % and 1411 %, respectively. So it is held that inoculation of bean crops with appropriate rhizobium is an approach to further promoting the merits of N nutrition of the legumious/ gramineous intercropping system.

Key words: Fababean/ maize, Rhizobium inoculation, N uptake, N content

CLC Number: 

• S143.1