番茄果实不同采收时间矿质元素变化分析

为比较分析番茄果实不同采收时间矿质元素的变化,以粉太郎和181两个番茄品种为材料,通过原子吸收光谱法和钼锑抗比色法测定不同采收时间番茄果实中钾(K)、磷(P)、镁(Mg)、钙(Ca)、铜(Cu)、铁(Fe)、锰(Mn)、锌(Zn)8种矿质元素的含量,研究不同采收时间番茄果实矿质元素的变化趋势。结果表明:8种矿质元素含量在不同采收时间有显著差异,2个参试品种的K、Ca、Mg、Cu元素含量在整个采收期总体呈下降趋势,其中Cu元素下降趋势显著;2种果实的Fe元素含量在整个采收期均呈先上升后下降而后又上升的趋势,粉太郎果实在4月7日含量最高,181果实于4月28日达最高值。相关性分析结果表明,部分矿质元素间存在正相关性,粉太郎果实中Mg元素与K、Cu、Zn元素分别呈显著正相关,181果实中Mg元素与Ca、Cu元素分别呈极显著正相关。研究结果可为高品质番茄栽培和采收时间选择提供理论指导。

Comparative analysis of mineral elements contents in tomato fruits at different harvest time

In order to compare and analyze the changes of mineral elements in tomato fruits at different harvest time, eight mineral elements of potassium (K), phosphorus (P), magnesium (Mg), calcium (Ca), copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn) in tomato fruits of Fentailang and 181 at different harvest time were determined by atomic absorption spectrometry and molybdenum antimony colorimetric method. The change trends of mineral elements in tomato fruits at different harvest time were studied. The results showed that there were significant differences in the contents of eight mineral elements in different harvest time. The contents of K, Ca, Mg and Cu in the two varieties showed a general downward trend in the whole harvest time, in which Cu decreased significantly. The contents of Fe in the two fruits showed a trend of first rising, then declining and then rising in the whole harvest time. The content of Fentailang fruit was the highest on April 7th, and that of 181 reached the highest on April 28th. The correlation analysis showed that there was a positive correlation between some mineral elements, there was a significant positive correlation within K, Cu, Zn and Mg in Fentailang fruit and Mg and Ca, Cu in 181 fruit. The results provided theoretical guidance for high quality tomato cultivation and harvest time selection.