腐植酸钾对设施番茄苗期高盐和低温胁迫的缓解作用  

Alleviation of Potassium Humate on Protected Cultivated Tomato at Seedling Stage under High Salinity and Low Temperature Stress

作　　者：熊静[1] 高杰云 刘伟[2] 谭钧 邢文军 陈清[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100193 [2]北京市农林科学院蔬菜研究中心,北京100097 [3]香港中向国际有限公司,北京100004

出　　处：《腐植酸》2015年第4期9-14,共6页Humic Acid

基　　金：现代农业产业技术体系北京市果类蔬菜创新团队项目(项目编号:GCTDZJ2014033009);中向国际木本泥炭农业领域应用项目;农业购买性资源适量化投入关键技术集成与示范项目(项目编号:2012BAD14B04)

摘　　要：针对反季节设施蔬菜面临的低温和土壤盐渍化等问题,本试验选用番茄为材料,采用基质栽培模拟方法,研究高盐和低温胁迫条件下,施用腐植酸钾对番茄苗期生长及根系活力的影响。试验分别采用高盐和普通低盐基质栽培并设立低温和适温两个温度,共设8个处理。试验结果表明:盐害、低温会明显抑制番茄苗期生长发育,与适温普通基质处理相比,适温高盐基质(SG)、低温普通基质(LP)、低温高盐基质(LG)环境下番茄干物重分别降低了17.4%、23.6%和38.0%;添加腐植酸钾的适温高盐基质(SG)、低温普通基质(LP)、低温高盐基质(LG)处理能明显提高番茄根系活力,比对照(SP)处理分别高8.0%、8.1%和4.2%。In order to solve the problems of the low temperature and soil salinization stress on protected-cultivated veg-etables in off-season, the simulated culture in substrate method used in this paper to study the effects of potassium hu-mate application on growth and root activity of tomato at seedling stage under high salinity and low temperature stress. Two cultivation (high-salinity stress and low-salinity control substrate) multiplying, two temperature (optimum and low control) and 8 treatments were designed in expreriment. The results showed that both salinity and low temperature stress could obviously inhibit the seedlings. Compared with control, the dry matter of tomato seedlings decreased by 17.4%, 23.6%and 38.0%under high salinity stress (SG), low temperature stress (LP), high salinity and low temperature stress (LG) treatments, respectively. The addition of potassium humate increased the root activity by 7.9%, 8.1%and 4.2%under high salinity (SG), low temperature (LP), high salinity and low temperature stress (LG) treatments, respectively.

关 键 词：腐植酸钾 盐分胁迫 温度 番茄 苗期 根系活力 

分 类 号：TQ444.6[化学工程—化学肥料工业]