论文部分内容阅读
通过基质盆栽冬小麦 ,研究了氮硫交互作用对小麦苗期生长及养分吸收的影响。研究结果表明 ,氮、硫对苗期小麦的生长都有一定影响 ,氮的增产效果远大于硫 ,当氮肥用量为 2 0 0mg/盆时 ,小麦生物量的最大增产幅度 89% ;在低氮水平下 ,硫肥的增产效果最佳 ,最高可增产12 %。硫肥的施用可以提高苗期小麦植株体内硫的累积量 ,在氮素胁迫的情况下最为显著 ,可提高 1倍以上 ;同时降低植株体内氮的累积 ,但降低幅度不大。氮素充足时 ,地上部与地下部生物量之比为 2 4～ 3 9,氮素胁迫条件下 ,小麦的地上部和地下部的生物量相当 ,说明氮素养分不足时 ,小麦合成的有机物质更倾向于分配给根系 ,促进根系的生长 ,这可能是小麦抵抗胁迫环境条件的生理机制之一。
The effects of nitrogen and sulfur interactions on wheat seedling growth and nutrient uptake were studied by basal potting of winter wheat. The results showed that nitrogen and sulfur all had certain effects on the growth of wheat at seedling stage, and the yield increase of nitrogen was much larger than that of sulfur. When the nitrogen fertilizer was 200 mg / pot, the maximum yield of wheat biomass was 89% The level of sulfur fertilizer yield the best, up to 12% increase. The application of sulfur fertilizer could increase the accumulation of sulfur in the seedling stage of wheat plants, which was the most significant in the case of nitrogen stress, which could be increased by more than 1 folds; meanwhile, the accumulation of nitrogen in the plant was reduced, but the decrease was not obvious. When sufficient nitrogen was available, the ratio of biomass to above-ground and below-ground biomass was 24 ~ 39. Under nitrogen stress, the biomass of above-ground and below-ground parts of wheat was comparable, indicating that when the nitrogen nutrient was insufficient, Materials are more likely to be distributed to the root system and promote the growth of the root system, which may be one of the physiological mechanisms for wheat to resist the environmental conditions of stress.