桦木属

The suspensor is developed fully at the stage of globular embryo and consists of 3 cells, which are degenerated later. The organization and development of the female flower and the type and synchrony of embryogenesis in Betulaceae are also discussed.

本文同时对雌花的结构和发育特点在桦木科各属中的异同、白桦胚胎发生类型及胚胎发育进程的同步性进行了讨论。

Alnus formosana that belongs to Alnus of Betulaceae is a tall deciduous arbor, and its native area locates in Taiwan province.

台湾桤木为桦木科桤木属落叶大乔木，原产台湾。

Alnus formosana that belongs to Alnus of Betulaceae is a tall deciduous arbor, and its native area locates in Tai...

台湾桤木为桦木科桤木属落叶大乔木，原产台湾。

Classification and distribution of the genus Betula L.

内蒙古桦木属植物的分类与分布。

A new species of Betula L. from China.

中国桦木属一新种。

A new species of Betula L. from China.

标题 中国桦木属一新种。

Classification and distribution of the genus Betula L.

标题 内蒙古桦木属植物的分类与分布。

Hazelnut is Betulaceae Corylus CorylusL.

榛子属桦木科榛属CorylusL。

Atopy was defined as a positive skin-prick test to mites, cat, Alternaria, Cladosporium, grass, birch, Parietaria, olive, or ragweed.

特应性定义为对螨类、链格孢属、分子孢子菌属、草、桦木、墙草属、橄榄或豚草属皮肤划痕实验阳性。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。