您的位置:首页  > 论文页面

根际温度对高温下温室番茄根系显微结构的影响

发表时间:2013-10-15  浏览量:1254  下载量:511
全部作者: 韩亚平,李亚灵,宋敏丽
作者单位: 山西农业大学园艺学院
摘 要: 针对夏季高温对温室番茄栽培的限制作用,实验力图通过降低根际温度缓解高温带来的危害。采用营养液深液流循环栽培法(deep flowing technique,DFT),以(28±1)℃的自然根温为对照,分别对根系进行(23±1)℃和(33±1)℃的处理,采用石蜡切片法对植株根系显微结构进行观察与测量。结果表明:与(28±1)℃的自然根温相比,(23±1)℃处理根系导管直径增大12.22%,导管密度降低20%;(33±1)℃处理根系的导管直径减小17.44%,导管密度增高30%;3个处理的导管总面积差异不显著。因此,降低根温至23℃左右,可增强根系的吸收和运输能力,利于植株生长,能有效缓解夏季高温危害,为生产提供新的越夏栽培技术。
关 键 词: 蔬菜学;温室番茄;根际温度;高温;石蜡切片;根系显微结构
Title: Influence of root-zone temperature on the microstructures of greenhouse tomato root under high temperature
Author: HAN Yaping, LI Yaling, SONG Minli
Organization: College of Horticulture, Shanxi Agricultural University
Abstract: High temperature in summer is a main limit factor for greenhouse tomato production. This experiment tried to reduce the root-zone temperature in order to relieve the harm of high temperature. Adopting deep flowing technique (DFT) method, the natural root-zone temperature of (28±1)℃ was taken as control, and the root-zone temperature of (23±1)℃ and (33±1)℃ were respectively realized as two treatments. The root microstructure was observed and measured by the method of paraffin section. Compared with the natural root-zone temperature of (28±1)℃, the diameter of root vessel was increased about 12.22%, and its density was reduced about 20% with the treatment of lower root-zone temperature of (23±1)℃. On the opposite, in the treatment of (33±1)℃ root-zone temperature, the diameter of root vessel was decreased about 17.44%, and its density was increased 30%. The total area of vessel had no significant difference among the three treatments. Therefore, lower root-zone temperature of 23℃ could enhance the uptake and transport ability of the roots, and was conducive to plant growth, effectively for relieving heat harm in summer, which provided the new technology of the over-summer cultivation for production.
Key words: vegetables; greenhouse tomato; root-zone temperature; high temperature; paraffin section; root microstructure
发表期数: 2013年10月第19期
引用格式: 韩亚平,李亚灵,宋敏丽. 根际温度对高温下温室番茄根系显微结构的影响[J]. 中国科技论文在线精品论文,2013,6(19):1820-1823.
 
0 评论数 0
暂无评论
友情链接