Studies on Green Panic Seed : XI. Effects of weather conditions during seed ripening on germination

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  • グリーンパニックの種子に関する研究 : XI.種子登熟時の気象条件が発芽に及ぼす影響
  • グリーンパニックの種子に関する研究-11-種子登熟時の気象条件が発芽に及ぼす影響
  • グリーンパニック ノ シュシ ニ カンスル ケンキュウ 11 シュシ トウジュ

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Abstract

Effects of temperature regime, mode of rainfall and light intensity during seed ripening on germination of green panic seed were examined. Germination of seed ripened at 29℃ was worse materially than those of seeds ripened at 25℃ or 21℃. Germination percentages of seeds exposed to rainfall during ripening were higher than that of seed met with no rain during ripening untill a year after harvest, but thereafter, the latter increased more speedily with seed age, and attained its maximum about 2 years after harvest. While seeds exposed to rainfall delayed to reach their peak germination. Germinating speed of seed exposed to a misty rain every day was more rapid than that of seed met with no rain. However, germinating speed of seed exposed to an intermittent rainfall every day was slowest. Seed in shade during ripening showed higher germination percentage 9 month after harvest than seed in full light during ripening, while heavy shade (light intensity was 20% of full light) brought slow germinating speed. In common in three experiments in this article, seed which was dried slowly during ripening showed better germination within several months after harvest, as seed previously reported which was dried slowly immediately after harvest did so. Based on these results and field experiences, it was discussed what were the suitable weather conditions during seed ripening for production of seed with better germinability in its early age.

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