叶片占植株地上部鲜质量的比例高于叶柄。
Leaf blade had more proportion than petiole in fresh weight.
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甘薯叶柄在中国的消费日趋增加，特别是在收获季节。
Itsconsumption in China is increasing, especially in the harvest season.
绿色椭圆型很薄的叶子，长而有弹性的叶柄。
Light green, elliptical, very thin, long flexible petiole.
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