中国稻米

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氮肥减量配施硅肥对水稻产量及病虫害防控的影响

  1. 1中国水稻研究所/水稻生物学国家重点实验室,杭州 310006;2庐江县农业技术推广中心,安徽 庐江 231500
  • 出版日期:2020-05-20 发布日期:2020-05-20
  • 通讯作者: 张均华
  • 基金资助:
    国家重点研发计划(2016YFD0200801);国家自然科学基金(31872857;31771733);水稻生物学国家重点实验室自主课题(2017ZZKT10404)

Effects of Reduce Nitrogen Fertilizer Combined with Silicon Fertilizer on Grain Yield and Pests and Diseases of Rice

  • Online:2020-05-20 Published:2020-05-20

摘要: 为探究减氮条件下配施硅肥对水稻产量及病虫害的影响,本研究比较了氮肥常规用量和氮肥用量减少20%~40%条件下,配施一定量的硅肥对水稻产量及病虫害发生的影响。结果表明,与常规用量施氮(300 kg/hm2)相比,氮肥减少20%~40%条件下,配施硅肥提高了水稻的产量及经济效益,显著降低了卷叶螟的数量且提升了害虫天敌数量,并显著降低稻曲病发生率和病情指数,最终减轻水稻病虫害。

关键词: 水稻, 氮肥减量, 硅肥, 产量, 病虫害

Abstract: In order to explore the effects of applying silicon fertilizer on the yield and diseases and insect pests control of rice under reduced nitrogen fertilizer application, five different fertilization treatments were designed. The results showed that, compared with N300 treatment, the N240Si60 and N180Si60 treatments could improve the yield and economic benefits of rice. Under N240Si60 and N180Si60 treatments, the number of Cnaphalocrocis medinalis as well as the incidence and disease index of rice false smut were significantly decreased, moreover, the number of natural enemies was significantly increased.

Key words: rice, reduce nitrogen fertilizer, silicon fertilizer, grain yield, pests and diseases

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