氮、硫供应水平对芜菁硫代葡萄糖苷含量的影响

硫代葡萄糖苷（GS）含量的多少是芜菁品质好坏的重要指标。本文采用沙培试验、 高效液相色谱法（HPLC）研究不同氮（80 kg/hm2、 160 kg/hm2和240 kg/hm2）和硫（10 kg/hm2和60 kg/hm2）供应水平对白玉芜菁叶和根中硫代葡萄糖苷组成和含量的影响。结果表明， 白玉芜菁叶片中有7种硫代葡萄糖苷，根中有9种硫代葡萄糖苷。叶片中总硫代葡萄糖苷含量是根部总硫代葡萄糖苷含量的1.16倍。增加硫供应水平，显著增加了根和叶中各种硫苷含量；随着氮供应水平的增加，吲哚族硫苷含量占总硫苷含量的比例显著增加。白玉芜菁中硫代葡萄糖苷的含量决定于氮和硫的平衡供应，在氮N 160 kg/hm2、 硫S 60 kg/hm2供应水平下硫代葡萄糖苷含量最高。

Effects of nitrogen and sulfur fertilization on glucosinolates of turnip

High glucosinolate(GS) content represents the good quality of turnip, which is strongly affected by the nitrogen and sulfate nutrition of turnip. In this paper, the effects of different application levels of N (80 kg/ha, 160 kg/ha and 240 kg/ha, denoted by N1, N2 and N3) and S (10 kg/ha and 60 kg/ha, denoted by S1 and S2) on the composition and concentration of glucosinolate（GS）in turnip (cultivar: Baiyu) were studied using sand culture experiment and HPLC method. The results show that there are 7 kinds of glucosinolates in the shoots and 9 kinds of glucosinolates in the roots of Baiyu turnip. The total content of glucosinolates in turnip shoots is 1.16 times of that in roots. The glucosinolate contents in the roots and shoots are increased with the increase of sulfur supply, and the ratio of indole glucosinolate to total glucosinolate is significantly increased with the increase of the nitrogen supply. The highest glucosinolates content is obtained in the N2S2 treatment. Glucosinolates content of turnip dependent on the balance of nitrogen and sulfur supply.