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通过2年田间试验,以杂交粳稻甬优1号为材料,研究不同作物管理技术对稻株氮素吸收利用和产量形成的影响。结果表明,水稻超高产集成技术产量提高21.2%,在分蘖期和抽穗期总氮量低于高产管理,但在成熟期总氮量与高产管理相近;在成熟期叶片、茎鞘中氮滞留量及其占总吸氮量的比例减少;穗部吸氮量提高,其占总吸氮量的比例增加。因此,水稻超高产集成技术能促进水稻叶片和茎鞘中的贮藏性氮向穗部转运,在总氮吸收量变化不大情况下,氮素的吸收利用率、氮素的农学利用率、氮素的生理利用率和氮肥偏生产力等均显著提高。
Through field experiments in two years, the hybrid rice “Yongyou 1” was used to study the effects of different crop management techniques on nitrogen uptake and utilization and yield formation of rice plants. The results showed that the yield of rice was increased by 21.2% and the total nitrogen at tillering stage and heading stage was lower than that at high yield management, but the total nitrogen level at maturity was similar to high yield management. At the mature stage, the nitrogen retention And the proportion of total N uptake decreased. The N uptake of panicles increased, and the proportion of N uptake increased. Therefore, rice super-high-yielding integrated technology can promote the storage of nitrogen in the leaves and stems of rice translocation to the ear, in the case of little change in total nitrogen uptake, nitrogen uptake and utilization, agricultural use of nitrogen, nitrogen utilization, nitrogen Sufficient physiological utilization and nitrogen fertilizer partial productivity were significantly increased.