间作作物种间竞争对菜花和芜菁中硫苷含量影响的初探

项目名称： 间作作物种间竞争对菜花和芜菁中硫苷含量影响的初探

项目编号： No.31071867

项目类型： 面上项目

立项/批准年度： 2011

项目学科： 武器工业

项目作者： 李淑敏

作者单位： 东北农业大学

项目金额： 8万元

中文摘要： 本研究以玉米/芜菁间作为对象，通过盆栽和田间微区实验，初步研究了玉米/芜菁间作体系中，不同氮素供应水平对芜菁中不同硫代葡萄糖苷含量影响。研究结果表明，芜菁根中硫苷种类主要是脂肪类和芳香类硫苷，但不同品种以及同一品种的不同器官中硫苷种类和含量差异较大，其中红圆芜菁中含有较高的苯乙基硫苷（9.05μl g-1 DW），约占总硫苷的37.2%，研究结果为开发新型抗癌功能食品提供新的材料。氮素供应水平对芜菁中硫苷含量影响显著，增施氮肥显著降低芜菁根中硫苷含量，但增施氮肥增加了根中吲哚类硫苷的相对比例，进一步研究表明，芜菁中的总硫苷含量与植株体内N/S显著相关，当N/S小于5时，会导致根中总硫苷显著下降；间作对芜菁中硫苷含量影响较为复杂，芜菁生育前期，不同氮素供应条件下，单作与间作之间无显著差异;生育后期，间作芜菁根中的总硫苷含量高于单作，但间作芜菁叶片中硫苷含量显著低于单作，产生该现象的原因只要是由于玉米的竞争作用改变芜菁植株体内氮和硫的含量，导致硫苷含量水平的改变。本研究为通过种植方式改变蔬菜品质提供了新的思路。

中文关键词： 玉米;芜菁;间作；硫代葡萄糖苷；氮素

英文摘要： Maize/turnip intercropping systems were adopted in this project.Pot and field experiments were conducted to study the effect of different nitrogen supply levels on glucosinolate concentration in turnip. Preliminary study results showed that alphatic and aromatic glucosinolates were the main contents in turnip roots. But glucosinolate composition and levels were different in different turnip cultivars and different organs in the same cultivat turnip.The most gluconasturtiin levels (9.05μl g-1 DW)was observed in Hongyuan turnip roots and it ocuppied 37.2% of total glucosinolates.The results provided new idea in developing new anti-cancer functional food. Nitrogen supply level has significant influnce on glucosinolate content in turnip roots. Glucosinolate concentration level in turnip roots was decreased with the increasing nitrogen supply.However, indole glucosinoltes proportion increased due to increase nitrogen supply. Further study showed that total glucosinolate concentration and N/S ratio had significant good relationship.If N/S ratio was below 5 total glucosinolates in turnip roots would significant decreased. Intercropping systems influenced glucosinolate content complexly. In early developing stage glucosinolate concentration between intercropped maizturnips and monocropped turnips had no significant difference.But in late developing stage glucosinolate concentration in intercropped turnip roots was significantly higher than that in monoculture turnip roots. Glucosinoates in intercropped turnip leaves were lower than that in monoculture turnip leaves. Nitrogen and sulphur concentrations in turnip were changed due to competition of maize which led to the change of glucosinolates concentration level. The results of the progect provided new ideas to improve vegetable quality through planting methods.

英文关键词： mazie;turnip;intercropping;glucosinolate;nitrogen;