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首页> 外文期刊>Agriculture, Forestry and Fisheries >Evaluation of Indigenous and High Yielding Rice Varieties for Growing in Tidal Floodplain Ecosystem of Southern Bangladesh
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Evaluation of Indigenous and High Yielding Rice Varieties for Growing in Tidal Floodplain Ecosystem of Southern Bangladesh

机译：孟加拉国南部潮滩平原生态系统中种植的本地高产水稻品种的评价

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摘要

Growth and yield of three indigenous varieties (Lalmota, Moulata and Sadamota) of aman rice was compared with that of two high yielding varieties (BRRI dhan 41 and BRRI dhan 44) in tidal floodplain ecosystem for two growing seasons. 45 d old seedlings transplanted in seedbed experienced repeated cycles of tidal submergence. Depth and duration of tidal flood differed between two growing seasons. Compared with high yielding varieties (HYVs), indigenous varieties developed longer seedlings and accumulated more dry mass prior to transplanting that helped survive repeated submergence. Planting density of indigenous varieties was about the half that of HYVs but developed more tillers per unit areas than HYVs. Seedlings of HYVs that survived had moderate tillering. HYVs ceased to develop tillers prior to flowering stage but the indigenous varieties continued growing tillers till maturity. In 2011-2012 season, HYVs produced higher yield than indigenous varieties but the trend reversed in the subsequent growing season. Number of panicles per unit area, number of spikelets per panicle, and 1000-grain weight largely contributed to higher yield. In absence of submergence tolerant HYVs, growing of indigenous rice varieties in the south central coastal region of Bangladesh could be the farmers' better choice.
机译：将潮汐洪泛区生态系统中两个生长季节的三个安曼稻本地品种（Lalmota，Moulata和Sadamota）的生长和产量与两个高产品种（BRRI dhan 41和BRRI dhan 44）的生长和产量进行了比较。移入苗床的45 d老苗经历了潮水淹没的反复循环。在两个生长季节之间，潮汐洪水的深度和持续时间有所不同。与高产品种（HYVs）相比，本地品种在移植前长出了更长的幼苗，积累了更多的干重，这有助于其反复淹没。本土品种的种植密度约为高产杂交种的一半，但每单位面积的分till比高产育种更多。幸存的HYVs幼苗分moderate适中。 HYVs在开花期之前不再发育分till，但本土品种继续生长直至成熟的分continued。在2011-2012年度，高产杂交种的产量高于本地品种，但在随后的生长季节趋势有所逆转。每单位面积的穗数，每穗的小穗数和1000粒重在很大程度上有助于提高产量。如果没有耐水淹的高产值，在孟加拉国中南部沿海地区种植土著水稻品种可能是农民的更好选择。

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