氮肥减施对超级稻玮两优8612产量及品质的影响

The Effects of Reducing Nitrogen Fertilizer Application on the Yield and Quality of Super Rice Weiliangyou 8612

为探究氮肥减施对玮两优8612产量和稻米品质的影响,确定生产中氮肥减施的可行性,设置了0(N0)、50(N50)、100(N100)、150(N150,一般氮肥施用量)和200 kg/hm^(2)(N200)5个氮肥施用水平,连续开展3年大田试验,测试其产量、产量相关性状及稻米品质。结果表明,与N150相比,适当增施(N200)和减施(N100)氮肥,玮两优8612的产量无显著增产或减产,对稻米加工、外观以及蒸煮品质也没有显著影响;N100处理下稻米蛋白质含量降低,有助于食味品质提升。综上,土壤肥力中等偏上的条件下,在氮肥减施(N100)处理下超级稻玮两优8612无显著减产;同时加工和外观品质指标对施氮量不敏感,氮肥减施下蛋白质含量下降,可以改善其食味品质。

To investigate the impact of reducing nitrogen fertilizer application on the yield and rice quality of Weiliangyou 8612,and to determine the feasibility of reducing nitrogen fertilizer application in production,five levels of nitrogen fertilizer application were set at 0(N0),50(N50),100(N100),150(N150,general nitrogen fertilizer application amount),and 200 kg/ha(N200),a three-year field experiment was conducted to test its yield,yield-related traits,and rice quality.The results showed that compared with N150,appropriate increases(N200)and reductions(N100)in nitrogen fertilizer application did not significantly increase or decrease the yield of Weiliangyou 8612,nor did it have a significant impact on rice processing,appearance,and cooking quality.However,reducing nitrogen fertilizer application reduced the protein content of rice,which was helpful for improving the taste quality.In conclusion,under the condition of medium to above soil fertility,super rice Weiliangyou 8612 had no significant yield reduction under the treatment of nitrogen reduction(N100).Furthermore,processing and appearance quality indicators were not sensitive to nitrogen application rate,and a reduction in nitrogen fertilizer application leaded to a decrease in protein content,which could improve its taste quality.