摘要
采用顶空固相微萃取—气质联用法研究了钾肥施用对茶鲜叶香气的影响.结果表明:与不施钾肥处理(CK1)相比,随着钾肥施用量的增大,茶鲜叶异戊烯二磷酸类中的芳樟醇含量明显增加,施用100(A1处理)、200(A2处理)、400(A3处理)kg.hm-2氯化钾(K2O≥60%)分别增加50.34%、61.72%和81.03%,且相互间的差异达到极显著水平(P<0.01);与CK1相比,A2、A3处理的苯甲醇含量分别增加24.61%、48.60%,β-苯乙醇含量分别增加30.67%、43.25%;钾肥施用后,脂肪酸类中具有青草气味的庚醛含量降低,而具有花香气味的壬醛、辛醇含量增加;施用不同种类钾肥对香气物质的影响共同表现为,增施钾肥能增加异戊烯二磷酸类和苯丙氨酸类挥发性物质的总量,施用硫酸钾能显著增加异戊烯二磷酸类挥发性物质中芳樟醇、罗勒烯等的含量,而施用硫酸钾镁能显著增加苯丙氨酸类挥发性物质中苯甲醛、β-苯乙醇等的含量.
The aroma components in different potassium treatments were extracted by headspace solld-phase micro-extraction （ HS- SPME） and analyzed by gas chromatography-mass spectrometry （C,C-MS）. Results showed that after applying potassium fertilizer, the isoamylene bisphosphate class and phenylalanine class increased. With increasing of the potassium fertilizer level, rate of in- crease of linalool reached 50.34% （Az ）, 61.72% （A2） and 81.03% （A3） respectively, and the differentiation between different treatments reached a significant level （P 〈0.01 ）. Compared with CKI, in A2 and A3, the amount of benzyl alcohol increased by 24.61%, 48.60%, respectively, and 13-phenylethyl alcohol increased by 30.67%, 43.25% respectively. For fatty acids class, a- roma with the smell of grass gas （heptanal） reduced and aroma with the smell of flower （ nonanal and octanol） increased. In addi- tion, the common effect of different kinds of potash on tea aroma was the increase of isoamylene bisphosphate class and phenylala- nine class. It is found that the content of isoamylene bisphosphate class （for example linalool, ocimene） in potassium sulfate treat- ment is much higher than that in sulphate-potassium magnesium sample and the content of phenylalanine class （ for example benzal- dehyde, β-phenylethyl alcohol） in sulphate-potassium magnesium is much higher than that in potassium sulfate treatment sample.
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2012年第6期601-607,共7页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
浙江省企事业单位合作项目(H20111385)
关键词
钾肥
茶叶
香气
顶空固相微萃取法
气质联用分析
potassium
tea
aroma
headspace solld-phase micro-extraction
gas chromatography-mass spectrometry
