不同硅酸钠浓度对甜瓜幼苗枯萎病的影响  

Effects of Different Concentrations of Sodium Silicate on Fusarium Wilt of Muskmelon Seedlings

作　　者：赵索[1] 樊景胜[1] 连永利[1] 曲忠诚[1] 徐婷[1] 武琳琳[1] 董扬[1] ZHAO Suo;FAN Jing-sheng;LIAN Yong-li(Qiqihar Branch of Heilongjiang Academy of Agricultural Sciences,Qiqihar,Heilongjiang 161000)

机构地区：[1]黑龙江省农业科学院齐齐哈尔分院,黑龙江齐齐哈尔161000

出　　处：《安徽农业科学》2020年第10期121-122,125,共3页Journal of Anhui Agricultural Sciences

摘　　要：采用盆栽试验,以“龙甜一号”甜瓜品种为研究对象,通过蘸根法取得发病植株,施用不同浓度的硅酸钠溶液,研究甜瓜根系活力、根系MDA含量、根系总酚含量和根系木质素含量的变化。结果表明,施入适当浓度的硅酸钠处理,能显著改善接种后的甜瓜根系活力,但施硅浓度过大,根系活力反而受到抑制。根系木质素和总酚含量在接种后第10天,CK显著低于其他3个处理;接种后第30天,处理②(1.7 mmol/L Na 2SiO 3)高于其他处理,木质素含量达显著水平。根系MDA含量在施入硅酸盐处理后,处理②在各个时期均显著低于其他处理。综上所述,施入适量的硅酸钠可以提高甜瓜幼苗枯萎病抗病性。The pot experiment was conducted to study changes of root activity,root MDA content,root phenol content and root lignin content of"Longtian No.1"melon cultivars by dipping roots and applying different concentrations of sodium silicate solution.The results showed that the root activity of inoculated melon was significantly improved by applying appropriate concentration of sodium silicate,but the root activity was inhibited when the concentration of silicon was too high.The content of lignin and total phenol in roots was significantly lower than that in the other three treatments on the 10th day after inoculation,and the content of lignin in treatment②was higher than that in other treatments on the 30th day after inoculation.The content of MDA in roots of treatment②was significantly lower than that of other treatments at all stages after silicate treatment.In conclusion,the application of appropriate sodium silicate can improve the resistance of melon seedlings to fusarium wilt.

关 键 词：甜瓜枯萎病 根系总酚含量 根系木质素含量 

分 类 号：S436R[农业科学—农业昆虫与害虫防治]