In milk stage and maturity stage, Chlorophyll content of PGR4 treatment was the highest and had a minimum magnitude of decrease, and PGR3 treatment took second place.
早稻在乳熟期、腊熟期两次测定的叶绿素含量时均以PGR4处理为最高，PGR3处理次之。
In milk stage and maturity stage, Chlorophyll content of PGR4 treatment was the highest and had a minimum magnitude of decrease, and PGR3 treatment took second place.
早稻在乳熟期、腊熟期两次测定的叶绿素含量时均以PGR4处理为最高，PGR3处理次之。
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