以白杜鹃花(R.mucronatum)为试材,研究了在碱性及缺铁胁迫条件下叶片和根系的生理生化反应及形态解剖变化。杜鹃在碱性缺铁情况下,生理及形态反应都符合双子叶植物和非禾本科单子
The ongoing novel coronavirus epidemic seemed to have pressed a pause button to the movement of most people over the past few weeks.rnAccording to Cong Liang, S
《控制理论与应用》第四届编委会会议于1998年9月ZI日至22日在98’中国控制会议期间于浙江宁波大学举行.来自全国20个学校和科研单位的32名编委参加了会议.副主编秦化淑研究员
辽宁省利用美国白蛾Hyphantria cunea(Drury)的蛹期寄生蜂--白蛾周氏啮小蜂Chouioia cunea防治美国白蛾取得了很好的效果。该文对人工繁蜂技术和田间放蜂技术进行了报 道。
The African continent has recorded a relatively high growth rate over the past decade.But, although the con tribution of women to this growth iswell established
Chen Xiongzhen, 53, is a single mother and an expert in agricultural vocational training.Since October 15, 2019, she has been working inEthiopia as a member of