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双季稻区6种不同稻田土壤类型对晚稻产量及稻米品质的影响

Effects of Different Paddy Soil Types in Double-rice Cropping Paddy Field on Grain Yield and Quality of Late Rice

  • 摘要: 研究双季稻区6种不同土壤类型对晚稻产量及稻米品质的影响,可为指导不同地域的水稻优质生产提供重要参考。本文以6年定位试验为基础,研究了南方双季稻区6种不同土壤类型晚稻产量及稻米品质的变化。结果表明,在6种不同土壤类型中,各处理优质晚稻的有效穗、每穗总粒数、结实率、千粒重和产量均无明显差异。垩白大小与穗干重之间呈显著的正相关。水稻产量以红黄泥田最高,达7570.46 kg/hm2,大小顺序为红黄泥田>河沙泥>灰泥田>麻沙泥>紫泥田>黄泥田。红黄泥田和紫泥田有利于提高优质晚稻的出糙率、精米率;灰泥田和河沙泥田有利于提高稻米的整精米率;黄泥田有利于提高稻米的胶稠度、蛋白质,降低垩白米率、垩白大小和直链淀粉含量。上述结果说明,黄泥田种植水稻有利于改善稻米品质。

     

    Abstract: To clarify the effects of different paddy soil types in double- rice cropping paddy field on grain yield and quality of late rice will contribute a great to rice production with high safety in different rice production areas. Therefore, the six long-term located experiments in paddy fields were made to investigate the effects of different paddy soil types including granitic sandy soil (GSS), grey clayey soil (GCS), purple clayey soil (PCS), red yellow clayey soil (RCS), yellow clayey soil (YCS) and alluvial sandy soil (ASS) on grain yield and quality of late rice in double- rice cropping paddy field with different paddy soil types. The results showed that there were not different on effective tillers numbers, grain number per panicle, seed setting rate, 1000 grain weight and grain yield in different paddy soil types. And there was a significantly positive correlation between chalky and dry weight of panicle. The largest grain yield was planted in RCS with 7570.46 kg/hm2, and sequences of late rice grain yield in different paddy soil types were RCS> ASS>GCS>GSS>PCS>YCS. The experiments indicated that the roughness and milled rice of late rice were increased in RCS and PCS, while the head milled ratio of late rice increased in GCS and ASS. And the gel consistency and protein were increased but the race of chalk, chalky and amylase were decreased in YCS. As a result, our results clearly demonstrated that the grain quality of late rice was improved in YCS

     

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