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向日葵生長周期多少天 向日葵的生長周期需要多少天

  • 生活
  • 2023-04-19 18:20
向日葵的生長周期為85-120天。整個生長周期共包括四個階段,第一是幼苗期,大概需要35-50天,夏播則需要28-35天。第二是現(xiàn)蕾期,一般需要20天的時間,此階段向日葵生長最旺盛。第三是開花期,需要6-9天的時間。第四則是成熟期,春播需要25-55天,夏播則需要25-40天的時間。

向日葵的幼苗期也就是從種子出苗到現(xiàn)蕾的這段時間,此時是葉子、花花原基形成、小花的分化階段,這個時候地面上部分生長較慢,地下部分長勢較快。現(xiàn)蕾期是營養(yǎng)生長與生殖生長的并進時期,是它整個生長周期中長勢最旺盛的一個階段,此階段需要保證充足的水肥,不然就會影響產量。

開花期是花盤從舌狀花***到管狀花***的這段時間,在第二天到第五天就是盛花期。向日葵一般是在早上的4-6點***的,在第二天上午會進行授粉,沒有授粉的枝頭可以保持一周到十天的時間。向日葵成熟期為開花到成熟的階段,此時需要保證土壤中水分適宜,還要有較大的晝夜溫差。

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