分期追施氮肥对玉米营养器官中非结构性碳水化合物转运及产量的影响
在追肥总量一定的条件下,通过分期追施氮肥,研究了玉米不同营养器官中非结构性碳水化合物(NSC)积累转运及产量变化。结果表明:玉米不同营养器官中NSC的转运量和转运率的变化规律相同,即转运量：茎(11.92g /株)>叶(2.78g /株)>根(0.04g /株),其转运率分别为7.72%、5.69%、2.70%；小喇叭口期：大喇叭口期：灌浆期=1:2:1的追肥方式,玉米的产量最高(10177.59 kg/hm2),较常规施肥增产11.86%。
英文摘要:
Under the condition of certain amount of topdressing, the accumulation and transportation of non-structural carbohydrate (NSC) in different vegetative organs and yield in corn were studied by applying nitrogen at different stages. The results showed the changes of mobilized NSC and mobilized efficiency are the same between different vegetative organs of corn. The mobilized NSC is stem (13.93g/plant) > leaves (2.78g/plant) > root (0.04g/plant). Also, from stem to root, the mobilized efficiency is 7.72%、5.70%、2.35%. Contrast other topdressing modes, when the topdressing mode of Small bell stage: male tetrad: filling stage was 1: 2: 1, the highest yield of corn was obtained. Its yield is 10177.59 kg/hm2. Compared with conventional topdressing mode, Increased by 11.86%.
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