一种土壤调理剂对玉米幼苗抗旱性的影响  

Effects of a soil conditioner on drought resistance of maize seedling

作　　者：尹梅[1] 苏帆[1] 付利波[1] 陈华[1] 陈检锋[1] 王志远[1] 洪丽芳[1] 

机构地区：[1]云南省农业科学院农业环境资源研究所,云南昆明650205

出　　处：《干旱地区农业研究》2015年第4期190-196,共7页Agricultural Research in the Arid Areas

基　　金：国家水体污染控制与治理科技重大专项湖泊主题滇池项目(2012ZX07102-003);国家科技支撑计划项目(2012BAD40B01);国际植物营养所(IPNI)项目联合资助

摘　　要：为研究新型高效土壤调理剂M3T对作物抗旱性的影响,开展水分胁迫下不同浓度M3T对盆栽玉米幼苗的抗旱性影响的试验。结果表明：添加M3T可增强土壤保水能力;M3T处理延长玉米幼苗的存活时间3～11天,增加玉米幼苗的株高和生物量;玉米幼苗体内叶绿素、丙二醛、脯氨酸、可溶性蛋白含量及过氧化物酶和超氧化歧化酶活性的动态测定结果表明,未加M3T的处理玉米幼苗最早感受到水分胁迫而产生生理生化反应,M3T处理的玉米幼苗出现水分胁迫反应延迟。干旱胁迫下,0.01%～0.03%M3T处理有利于玉米幼苗生长,0.04%～0.05%M3T处理增强了玉米幼苗抗旱性,其存活时间更长;0.02%～0.03%M3T处理下农作物在干旱胁迫下可正常生长发育,且具有较好的抗旱性,为较佳处理。In order to study the effects of a new soil conditioner,M3 T,on drought resistance of crops,a pot-based experiment applying M3 T with different concentrations on maize seedlings under drought was carried out. The results showed that M3 T improved water-holding ability of soil and prolonged the life time of maize seedling by 3 ～ 11 days. It also increased height and biomass of maize seedlings. Dynamic examinations on contents of chlorophyll,MDA,Pro,soluble protein,POD and SOD in maize seedlings showed that maize seedlings without any M3 T treatment displayed earlier physiological responses to water stress than those with M3 T treatment. It was further found that 0. 01% ～ 0. 05% M3 T promoted the plant growth,and 0. 04% ～ 0. 05% M3 T enhanced the drought resistance and prolonged the life time of maize seedlings. In conclusion,0. 02% ～ 0. 03% M3 T was optimal for the growth of maize seedlings under drought.

关 键 词：干旱胁迫 土壤调理剂 玉米幼苗 抗旱性 

分 类 号：S156.2[农业科学—土壤学] S513[农业科学—农业基础科学]