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。

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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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