The flower buds of middle and late chinese kale appeared later than those of ealy one in hangzhou .
在杭州地区,中、晚热芥蓝现蕾比早熟芥蓝迟。
Silieification appear to be widespread is study area . Silicifieation is mainly took place in ealy diagenetic stage , and desilicification in post - diagenetic stage .