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为筛选出五丰优T025在红壤稻田上的合理氮肥用量和种植密度,本试验以天优998为对照品种,在典型的红壤性水稻土设置了氮肥用量与种植密度试验,系统研究了不同氮密互作条件下五丰优T025的茎蘖动态和产量变化。结果表明,氮密互作下五丰优T025和天优998的分蘖消长动态基本一致,在移栽后60 d(齐穗期),五丰优T025每m2有效分蘖328个,天优998为349个;不同氮肥用量的分蘖数不存在显著差异,但不同种植密度之间的分蘖数均存在显著差异,与低密度处理(D21)相比,五丰优T025 D26和D32处理每m2分蘖数分别增加了13.8%~33.1%、6.4%~11.1%,天优998分别增加30.1%~34.9%、5.7%~12.1%;五丰优T025和天优998均以N180D32处理产量最高,分别为10 719.0 kg/hm2和9 682.7 kg/hm2;与天优998相比,五丰优T025的有效穗数和每穗粒数明显要高,由于有效穗数与产量成显著的正相关关系,表明五丰优T025主要是通过增加有效穗数来实现水稻增产。在南方红壤稻田上,五丰优T025的合理氮密配比为N 180 kg/hm2、栽插密度32万丛/hm2。
In order to screen out the reasonable amount of nitrogen fertilizer and planting density of Niffey T025 in paddy field of red soil, the experiment was conducted in which Tianyou 998 was used as the control variety. Nitrogen fertilizer rate and plant density were set up in typical paddy soil. Dynamic Change of Stem Tillering and Yield of Five Fung Excellent T025 under Close and Interaction Conditions. The results showed that the dynamics of tiller growth and decline of Wufengyou T025 and Tianyou998 under nitrogen and nitrogen interactions were basically the same. After 60 days of heading (full heading), Wufengyou T025 had 328 effective tillers per m2 and Tianyou 998 was There were no significant differences in tillering numbers among different nitrogen application rates, but there were significant differences in tillering numbers among different planting densities. Compared with low-density treatment (D21), the number of tillers per m2 of Wufengyou T025 D26 and D32 Increased by 13.8% -33.1%, 6.4% -11.1%, and Tianyou 998 increased by 30.1% -34.9% and 5.7% -12.1% respectively. The highest yield of Nifuyou T025 and Tianyou 998 was N180D32, which was 10 719.0 kg / hm2 and 9 682.7 kg / hm2, respectively. Compared with Tianyou 998, the effective spikes and grains per spike of Wufengyou T025 were significantly higher. Because of the significant positive correlation between the effective spikes and yield, Feng You T025 mainly by increasing the effective panicle to achieve rice yield. In the red soil paddy fields in South China, the optimal ratio of nitrogen and nitrogen of Wufengyou T025 was N 180 kg / hm2 and planting density was 320,000 plexuses / hm2.