本文主要研究内容
作者张博宇(2019)在《铅胁迫对黄花风铃木幼苗生长和生理的影响》一文中研究指出:黄花风铃木是我国华南地区常见的园林绿化树种。其原产于南美洲,现广泛栽培在我国热带、亚热带城市的各个角落,对城市景观的营造起到了积极的作用。铅是一种常见的重金属污染,加强对黄花风铃木铅胁迫的研究,有助于探究其适合的生长环境及扩大铅污染地引种范围,具有重要意义。本次试验以黄花风铃木幼苗为供试材料进行盆栽实验,采用控制其土壤含水量(土壤田间持水量的60%)的形式进行4种土壤外源铅浓度(CK、lOOOmg·kg-1、3000mg·kg-1、5000mg·kg-1)设计方案。通过测定其生长特性、生理特性来分析黄花风铃木对重金属铅的抗性能力。结果表明:(1)不同的土壤外源铅浓度对黄花风铃木幼苗生长特性有差异影响。随着土壤外源铅浓度不断增加,黄花风铃木幼苗的株高、地径相对增量以及生物量都呈现出先增后减的趋势,并且都在施加l000mg·kg-1 Pb时长势最佳;其根冠比和高径比基本呈现平稳上升趋势;总根长随着土壤外源铅浓度不断增加呈现出先升高后降低的趋势,总根体积和根尖数呈现出不断抑制作用。(2)不同的土壤外源铅浓度对黄花风铃木幼苗生理特性有差异影响。随着土壤外源铅浓度不断增加,黄花风铃木幼苗的叶绿素呈现出不断下降趋势;可溶性糖、可溶性蛋白、超氧化物歧化酶(SOD)、过氧化物酶(POD)呈现出先升高后降低的趋势,并且都在施加l000mg·kg-1 Pb时达到最大值;游离脯氨酸、丙二醛(MDA)基本呈现出不断上升趋势;随着土壤外源铅浓度不断增加,黄花风铃木幼苗的胞间CO2浓度(Ci)基本呈现出不断下降趋势;净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)呈现先升高后降低的趋势。随着土壤外源铅浓度不断增加,黄花风铃木幼苗的Fv/F0值和Fv/Fm值也均出现随着土壤外源铅浓度的不断增加,呈现先升高后降低的趋势。(3)对黄花风铃木幼苗体内铅含量的测定结果表明,黄花风铃木幼苗地下部和地上部的铅含量随着土壤外源铅浓度的不断增加而显著增加。通过对不同土壤外源铅浓度对黄花风铃木幼苗生长特性、生理特性及光合特性各项指标以及对其隶属函数分析可以表明,长势最好的处理组是施加1000mg·kg-1 Pb,长势最不好的处理组是施加5000mg·kg-1 Pb。表明施加1000mg·kg-1 Pb的铅处理对黄花风铃木幼苗的生长起到一定的促进作用,但是施加5000mg·kg-1 Pb的铅处理对黄花风铃木幼苗的生长有毒害作用。
Abstract
huang hua feng ling mu shi wo guo hua na de ou chang jian de yuan lin lu hua shu chong 。ji yuan chan yu na mei zhou ,xian an fan zai pei zai wo guo re dai 、ya re dai cheng shi de ge ge jiao la ,dui cheng shi jing guan de ying zao qi dao le ji ji de zuo yong 。qian shi yi chong chang jian de chong jin shu wu ran ,jia jiang dui huang hua feng ling mu qian xie pai de yan jiu ,you zhu yu tan jiu ji kuo ge de sheng chang huan jing ji kuo da qian wu ran de yin chong fan wei ,ju you chong yao yi yi 。ben ci shi yan yi huang hua feng ling mu you miao wei gong shi cai liao jin hang pen zai shi yan ,cai yong kong zhi ji tu rang han shui liang (tu rang tian jian chi shui liang de 60%)de xing shi jin hang 4chong tu rang wai yuan qian nong du (CK、lOOOmg·kg-1、3000mg·kg-1、5000mg·kg-1)she ji fang an 。tong guo ce ding ji sheng chang te xing 、sheng li te xing lai fen xi huang hua feng ling mu dui chong jin shu qian de kang xing neng li 。jie guo biao ming :(1)bu tong de tu rang wai yuan qian nong du dui huang hua feng ling mu you miao sheng chang te xing you cha yi ying xiang 。sui zhao tu rang wai yuan qian nong du bu duan zeng jia ,huang hua feng ling mu you miao de zhu gao 、de jing xiang dui zeng liang yi ji sheng wu liang dou cheng xian chu xian zeng hou jian de qu shi ,bing ju dou zai shi jia l000mg·kg-1 Pbshi chang shi zui jia ;ji gen guan bi he gao jing bi ji ben cheng xian ping wen shang sheng qu shi ;zong gen chang sui zhao tu rang wai yuan qian nong du bu duan zeng jia cheng xian chu xian sheng gao hou jiang di de qu shi ,zong gen ti ji he gen jian shu cheng xian chu bu duan yi zhi zuo yong 。(2)bu tong de tu rang wai yuan qian nong du dui huang hua feng ling mu you miao sheng li te xing you cha yi ying xiang 。sui zhao tu rang wai yuan qian nong du bu duan zeng jia ,huang hua feng ling mu you miao de xie lu su cheng xian chu bu duan xia jiang qu shi ;ke rong xing tang 、ke rong xing dan bai 、chao yang hua wu qi hua mei (SOD)、guo yang hua wu mei (POD)cheng xian chu xian sheng gao hou jiang di de qu shi ,bing ju dou zai shi jia l000mg·kg-1 Pbshi da dao zui da zhi ;you li fu an suan 、bing er quan (MDA)ji ben cheng xian chu bu duan shang sheng qu shi ;sui zhao tu rang wai yuan qian nong du bu duan zeng jia ,huang hua feng ling mu you miao de bao jian CO2nong du (Ci)ji ben cheng xian chu bu duan xia jiang qu shi ;jing guang ge su lv (Pn)、qi kong dao du (Gs)、zheng teng su lv (Tr)cheng xian xian sheng gao hou jiang di de qu shi 。sui zhao tu rang wai yuan qian nong du bu duan zeng jia ,huang hua feng ling mu you miao de Fv/F0zhi he Fv/Fmzhi ye jun chu xian sui zhao tu rang wai yuan qian nong du de bu duan zeng jia ,cheng xian xian sheng gao hou jiang di de qu shi 。(3)dui huang hua feng ling mu you miao ti nei qian han liang de ce ding jie guo biao ming ,huang hua feng ling mu you miao de xia bu he de shang bu de qian han liang sui zhao tu rang wai yuan qian nong du de bu duan zeng jia er xian zhe zeng jia 。tong guo dui bu tong tu rang wai yuan qian nong du dui huang hua feng ling mu you miao sheng chang te xing 、sheng li te xing ji guang ge te xing ge xiang zhi biao yi ji dui ji li shu han shu fen xi ke yi biao ming ,chang shi zui hao de chu li zu shi shi jia 1000mg·kg-1 Pb,chang shi zui bu hao de chu li zu shi shi jia 5000mg·kg-1 Pb。biao ming shi jia 1000mg·kg-1 Pbde qian chu li dui huang hua feng ling mu you miao de sheng chang qi dao yi ding de cu jin zuo yong ,dan shi shi jia 5000mg·kg-1 Pbde qian chu li dui huang hua feng ling mu you miao de sheng chang you du hai zuo yong 。
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论文详细介绍
论文作者分别是来自广西大学的张博宇,发表于刊物广西大学2019-10-14论文,是一篇关于黄花风铃木论文,幼苗论文,铅胁迫论文,生长论文,生理论文,广西大学2019-10-14论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自广西大学2019-10-14论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。