摘要： 以辽园多丽番茄幼苗为试材,模拟北方冬春季节日光温室的低温条件,设置夜间低温6℃处理,以正常夜间温度15℃为对照,测定番茄幼苗植株对N、P、K、Ca、Mg元素的吸收情况,为低温季节设施番茄栽培和施肥提供理论依据。测定结果表明,夜间低温抑制了番茄幼苗根系对N、P、K、Ca、Mg元素的吸收,番茄幼苗N素在叶片中含量最高,而P素在根系中含量最高;番茄幼苗根系对K素的吸收随着处理时间的延长,与对照相比差距逐渐缩小,到7 d时基本持平;低温处理3 d后,根系中Ca、Mg含量开始增大,而叶片中Ca、Mg含量与对照相比呈明显下降趋势。
关键词:
番茄幼苗,
夜间低温,
矿质元素,
吸收功能
Abstract: Tomato Liao Yuan Duo Li is the materials of this experiment．In order to analog the low temperature conditions of northern in winter and spring，set the temperature of nighttime as low as 6 ℃ to cultivate seedlings． The compared seedlings was cultivated as normal temperature as 15 ℃ of nighttime．The absorption of N， P， K， Ca， Mg of tomato seedlings was tested to provide theoretical bases for cultivation and fertilization of tomato in low tem- perature season．The experiment has shown that the low temperature of nighttime inhibits tomato seedlings roots from absorbing N，P，K，Ca，Mg．The leaves of tomato seedlings concentrates highest N，and the roots concentrates highest P; compared with the seedlings cultivated in normal temperature，the differences of the K absorption was disappea- ring gradually with the treatment time flying，equals at 7 d; cold treatment for 3 d，the content of Ca，Mg in the roots starts to increase but decreases in the leaves significantly compared with the normal seedlings．
Key words:
Tomato seedlings,
Low temperature of nighttime,
Mineral elements,
Absorbent function
中图分类号:
倪洋, 张雪, 刘玉凤, 李天来. 夜间低温对番茄幼苗吸收矿质元素的影响[J]. 华北农学报, 2013, 28(4): 93-97. doi: 10.3969/j.issn.1000-7091.2013.04.018.
NI Yang, ZHANG Xue, LIU Yu-feng, LI Tian-lai. Effects of Low Night Temperature on Mineral Elements Absorption of Tomato Seedlings[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(4): 93-97. doi: 10.3969/j.issn.1000-7091.2013.04.018.