论文部分内容阅读
以江苏省6个半冬性和9个春性小麦品种为材料,研究两类型小麦品种在大田条件下的氮素积累、运转和分配差异.结果表明:施氮量相同条件下,半冬性小麦群体植株平均氮素积累量在越冬始期-拔节期低于春性小麦群体,孕穗期-成熟期高于春性小麦群体;氮素阶段累积量在越冬始期-拔节期两类型群体间差异不显著,开花-成熟期半冬性群体显著高于春性群体.半冬性小麦平均总氮素转运量、花后积累量显著高于春性小麦;两种类型小麦总氮素转运率、积累氮贡献率、总转运氮贡献率差异均不显著.半冬性小麦营养器官中叶片氮素转运量、转运率、转运氮贡献率均低于春性小麦,茎鞘氮素转运量、转运率、转运氮贡献率则高于春性小麦,茎鞘氮素转运量差异达显著水平;同一类型内不同品种间植株氮素积累量、总氮素运转量、花后氮素积累量、总氮素转运率、总转运氮贡献率等均存在差异.生产中应根据不同品种吸收、利用、运转氮素能力的差异,合理运筹生育期氮肥用量和施用比例,提高氮肥利用率.
In this study, six semi-winter and nine spring wheat cultivars in Jiangsu Province were used as materials to study the differences in nitrogen accumulation, transport and distribution between two wheat cultivars under field conditions.The results showed that under the same nitrogen application rate, The average nitrogen accumulation in wheat population was lower than that in spring wheat at jointing stage-jointing stage, but higher in booting stage-maturing stage than that in spring wheat group. The difference of nitrogen accumulation stage was not significant between winter and early jointing stage Significantly, the flowering-maturity semi-winter population was significantly higher than that of the spring population.The average total nitrogen translocation and post-anthesis wheat accumulation in semi-winter wheat were significantly higher than that in spring wheat.The total nitrogen translocation rate and accumulation Nitrogen contribution rate and contribution rate of total translocation of nitrogen were all not significant.Non-leaf translocation, translocation rate and translocation rate of nitrogen in vegetative organs of semi-winter wheat were lower than those in spring wheat, stem-sheath nitrogen translocation rate, , And the contribution rate of nitrogen translocation was higher than that of spring wheat, and the difference of nitrogen translocation between stems and sheaths was significant. In the same type, the nitrogen accumulation, total nitrogen translocation, post-anthesis nitrogen accumulation, total nitrogen Translocation rate, total transit nitrogen Contribution rate, etc. In production, according to the differences of abilities of absorbing, utilizing and operating nitrogen of different varieties, it is necessary to rationally manage the amount and proportion of nitrogen fertilizer in the growth period and improve the utilization rate of nitrogen fertilizer.