氮肥基因型差异对玉米吸氮量的反应

田间试验研究了11个玉米杂交种在不同施氮条件下的吸氮量。结果表明，玉米吸氮量具有明显的基因型差异。在低氮(N2)处理中，子粒、秸秆、地上部吸氮量高低品种相差分别为1.060、0.134、1.125g/kg，在高氮(N4)处理中，分别为0.836、0.154、0.954g/kg。不同基因型玉米的吸氮量差异低氮条件比高氮条件更大。施氮量对玉米吸氮量有显著的影响。玉米子粒、秸秆、地上部吸氮量和相应的产量呈极显著的正相关

Effect of Nitrogen Fertilizer and the Genotypes on Nitrogen Uptake of Maize

The nitrogen(N) uptake by 11 maize hybrids in a field trial with three replications at four rates of N supply were researched. Results showed that the N uptake is significantly different among the genotypes. The different of N uptake by grain, straw and biomass of aerial part between highest and lowest genotype in N2 treatment are 1 060,0 134 and 1 125 g/kg, respectively, and that in N4 treatment are 0 836,0 154 and 0 954 g/kg,respectively. The difference of N uptake by different genotypes in low N treatment is higher than in high N treatment. N fertilizer rate influence the N uptake by the maize remarkably. There is very significant positive correlate between N uptake by grain, straw and aerial part and corresponding outputs of that.