Abstract:

The experiment was conducted under different fertilizer levels to explore the combined effects from allelopathy and the reduced use of fertilizers, with Allelopathy rice 3, Hualiangyou 3, Huazhenyou 3, Nongzhenyou 3 and Hangmeixiangzhan as materials. The results showed that a moderate amount of reducing fertilizer could increase yield and improve quality of rice, the four rice materials with allelopathy characteristics could cause the inhibition of paddy weeds number and biomass, the suppression effect was increasing with the decreased of fertilizer, the Allelopathy rice 3 and Hualiangyou 3 with fertilizer decrease 20% compared with conventional fertilization use could obviously reduce gramineae and broad-leaved weeds, and keep yield and improve quality, the same as Huazhenyou 3 and Nongzhenyou 3 with fertilizer decrease 30%.

Key words: reducing fertilization, allelopathic rice, inhibiting effect, weeds

摘要：

以具有化感特性的化感稻3号、化两优3号、华珍优3号、农珍优3号和常规稻航美香占为材料，在大田试验条件下分析了减量施肥对化感水稻抑草效果以及对水稻产量和品质的影响。结果表明，适当减少施肥量可提高水稻产量，改善稻米品质；4个具有化感特性的品种对稻田杂草数量和生物量的抑草作用均随肥料用量的减少而增强，其中，化感稻3号减肥20%，化两优3号、华珍优3号和农珍优3号减肥30%时禾本科和阔叶杂草均较常规施肥小区显著减少，稻谷产量与对照相比没有显著差异，稻米加工品质和外观品质提高。

关键词: 减量施肥, 化感稻, 抑制作用, 杂草