摘要
为了探讨有机活性物质对蔬菜种子的促生效应,以黄瓜("京研夏美2号")为试材,分别采用不同浓度的水溶性有机物质(DOM)、吲哚乙酸(IAA)、黄腐酸、壳聚糖等4种有机活性物质进行浸种处理,比较4种有机活性物质对黄瓜种子发芽相关生理指标的影响。结果表明:DOM3(10%)的发芽势高于对照及其他处理,黄腐酸2、3、4(1.0、10、100 mg/L)浓度下的发芽势高于对照,壳聚糖1、2、3(1000、2000、3000 mg/L)浓度下发芽势高于对照,综合发芽势和发芽率指标可看出,高浓度的IAA抑制种子的发芽,低浓度的IAA促进种子发芽,验证了一定浓度的DOM、IAA、黄腐酸和壳聚糖能促进种子的萌发;DOM4(20%)黄瓜种子活性最高,远超过CK;IAA和壳聚糖的种子活性均低于CK,且随浓度的升高而降低;浓度为1.0 mg/L的黄腐酸处理下种子活力指数达到最高。DOM4浓度下根长比对照增长35.9%,DOM3浓度下根毛数最多;低浓度的IAA(0.1 mg/L)促进黄瓜早期根毛的生长,高浓度时抑制根系生长;黄腐酸3(10 mg/L)在第8天时根毛数最多,整个生长期间的根毛数增长率为768.2%,根系生长最旺盛;壳聚糖在高浓度和低浓度时的根长及根毛数均低于CK。一定浓度的DOM、IAA、黄腐酸能促进黄瓜根系生长。
To explore the growth-promoting effect of active organic substances on vegetable seeds,cucumber("Jingyan Xiamei No.2")was used as a test material.Four kinds of active organic substances(DOM,IAA,fulvic acid and chitosan)with different concentrations were used to soak the seeds,and the effects of four kinds of active organic substances on physiological indexes of cucumber seed germination were compared.The results showed that the germination potential of DOM3(10%)was higher than that of CK and other treatment.The germination potential of fulvic acid 2,3,4(1.0,10,100 mg/L)was higher than that of CK.The germination potential of chitosan 1,2,3(1000,2000,3000 mg/L)was higher than that of CK.It can be seen from the indexes of germination potential and germination rate,high concentration of IAA inhibited seed germination,while low concentration of IAA promoted seed germination.It was verified that a specific concentration of DOM,IAA,fulvic acid and chitosan could promote seed germination.The cucumber seed activity of DOM4(20%)was higher than that of CK.The seed activity of IAA and chitosan was lower than that of CK,and decreased with the increase of concentration.The seed vigor index reached the highest under fulvic acid 2 treatment(1.0 mg/L).The root length of DOM4 was 35.9%higher than that of CK,DOM 3 had the most root hair number.Low concentration of IAA(0.1 mg/L)could promote the growth of root hair in early stage,but high concentration could inhibit the growth of root.Fulvic acid 3(10 mg/L)had the most root hair number on the eighth day,and the growth rate of root hair number was 768.2%during the whole growth period;the root length and root hair number of chitosan at high concentration and low concentration were lower than those of control.DOM,IAA and fulvic acid could promote the growth of plant roots.
作者
李应心
柳夏艳
孔令宇
曹浩轩
吕贻忠
Li Yingxin;Liu Xiayan;Kong Lingyu;Cao Haoxuan;Lv Yizhong(School of Resources and Environment,China Agricultural University,Beijing,100193)
出处
《腐植酸》
2021年第4期13-19,共7页
Humic Acid
基金
“十三五”国家重点研发计划重点专项“畜禽养殖废弃物生物降解与资源转化调控机制”项目(项目编号2018YFD0500200)。
关键词
有机活性物质
黄腐酸
黄瓜种子
萌发
organic active substance
fulvic acid
cucumber seed
germination
作者简介
李应心,女,1996年生,硕士研究生,主要从事土壤肥力与有机肥方面的研究,E-mail:18211091699@163.com;通讯作者:吕贻忠,男,教授/博士生导师,E-mail:lyz@cau.edu.cn。
