The highest decreasing magnitudes of PGR4 were in functional leaves, however PGR1 in stems.
功能叶中以PGR4处理减少幅度最大，茎杆中以PGR1处理减少幅度最大。
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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