常見例句A coarse cosmopolitan weed(Amaranthus retroflexus) having hairy leaves and stout, terminal panicles with dense, lateral spikes of green flowers. 藜一種分布于世界各地的粗糙野草（反枝莧莧屬），長有毛茸茸的葉子，和有綠花的濃密側面穗狀花序的緊湊的頂生圓錐花序Redroot pigweed (Amaranthus retroflexus L.) is an annual species of weeds which is widely distributed and important in cultivated field and other land all over the world. 摘要反枝莧是世界性分布的一種惡性雜草，瞭解其生物學特性將有助于對其進行有效防治。A field experiment was conducted to determine the relationships between the yield loss of summer maize and the infestations of Amaranthus retroflexus and PoHulaca oleracea. 為了明確雜草種類對雜草密度與夏玉米產(chǎn)量損失之間的函數(shù)關系的影響及反枝莧和馬齒莧為害夏玉米的產(chǎn)量損失模型,在田間開展了此項研究。Amaranthus retroflexus L. [醫(yī)] 反枝莧，西風古Arnaranthus retroflexus L. 反枝莧All these 5 isolates were cultured in PD, PS, corn powders , modified Fries, Czapek-Dox and Rrichard media respectively then the bioactivity of the culture filtrate, crude toxin to Digitaria sanguinalis L.and Amaranthus retroflexus L. was tested. 將所得5株菌株分別在PD培養(yǎng)基、PS培養(yǎng)基、玉米粉培養(yǎng)基、改良Fries培養(yǎng)基、Czapek-Dox培養(yǎng)基和Richard培養(yǎng)基中進行培養(yǎng),所得培養(yǎng)濾液、粗毒素對馬唐和反枝莧的除草生物活性進行了測定。 返回 Retroflexus