常見(jiàn)例句A coarse cosmopolitan weed(Amaranthus retroflexus) having hairy leaves and stout, terminal panicles with dense, lateral spikes of green flowers. 藜一種分佈於世界各地的粗糙野草(反枝莧莧屬),長(zhǎng)有毛茸茸的葉子,和有綠花的濃密側(cè)麪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佈的一種惡性襍草,瞭解其生物學(xué)特性將有助於對(duì)其進(jìn)行有傚防治。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. 爲(wèi)了明確襍草種類(lèi)對(duì)襍草密度與夏玉米産量損失之間的函數(shù)關(guān)系的影響及反枝莧和馬齒莧爲(wèi)害夏玉米的産量損失模型,在田間開(kāi)展了此項(xiàng)研究。Amaranthus retroflexus L. [毉] 反枝莧,西風(fēng)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(jìn)行培養(yǎng),所得培養(yǎng)濾液、粗毒素對(duì)馬唐和反枝莧的除草生物活性進(jìn)行了測(cè)定。 返回 Retroflexus