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试验结果表明,不同处理的春小麦各生育期的氮磷吸收趋势是一致的。植株的氮素相对含量苗期最高,抽穗期最低,灌浆期逐渐提高,每个时期与对照几乎相同。而绝对含量各时期是逐渐上升的,且明显高于对照;植株磷素相对和绝对含量苗期最低,拔节期急速上升。不同处理的相对含量与对照接近,绝对含量明显高于对照;同时,合理施用氮肥,不仅能促进磷素的吸收,而且能促进土壤磷的释放,改变土壤磷的形态。通过 F 值测定,不同氮肥品种间产量差异不显著。氮磷配合处理间差异极显著。且以尿素和硫铵组合的处理增产效果最佳。同时,在人工灌溉条件下,施肥各处理其用水效率都有明显提高。
The results showed that the trend of nitrogen and phosphorus absorption in spring wheat under different treatments was consistent. Plant nitrogen content relative to the highest seedling stage, the lowest heading stage, filling stage gradually increased, with each control period almost the same. The absolute content of each stage is gradually increased, and significantly higher than the control; plant relative and absolute content of phosphorus seedling minimum, rapid increase at jointing. The relative content of different treatments was close to that of the control, and the absolute content was significantly higher than that of the control. At the same time, rational application of N could not only promote the absorption of phosphorus, but also promote the release of soil phosphorus and change the form of soil phosphorus. Through the F value determination, the yield difference between different nitrogenous varieties is not significant. There was significant difference between nitrogen and phosphorus treatments. And the combination of urea and ammonium sulfate treatment yield the best. At the same time, under the condition of artificial irrigation, the water use efficiency of fertilization and treatment has obviously increased.