不同种植点的土壤成分与香稻‘苟当1号’挥发性成分的关系

Relationship Between Soil Components and Volatile Components of Aromatic Rice‘Goudang1’in Different Planting Sites

稻米的香味除了受遗传基因影响外,栽培环境对香稻的香味物质成分及含量也有重要的影响。为探究贵州省从江县不同种植点的土壤环境对‘苟当1号’稻米香味物质成分的影响,本研究在贵州省从江县200~900 m的海拔范围内选取5个不同海拔高度的地点分别种植‘苟当1号’,并对5个地点的土壤进行速效氮、速效钾、速效磷、有机质含量以及pH值测定,采用顶空固相微萃取(HS-SPME)和气相色谱-质谱(GC-MS)技术,对各个种植点的‘苟当1号’稻米中挥发性物质成分进行分析。结果表明,‘苟当1号’在不同种植点检测出的挥发性物质种类和含量存在差异,其中影响水稻香味的重要物质2-乙酰-1-吡咯啉(2-AP)在土壤中速效钾和速效磷含量最高的高大种植点相对含量最高,因此‘苟当1号’在该种植点的香味最浓郁。‘苟当1号’香稻稻米中含有许多挥发性成分,探究该香稻品种种植于不同种植点的土壤特性与主要的香味挥发性物质之间的关系,研究结果可为该香稻品种选择适宜的种植点提供理论依据,为香稻生产产业的发展提供参考。

Besides the influence of genetic genes,the cultivation environment also has an important influence on the aroma components and content of aromatic rice.In order to explore the effects of soil environment at different altitudes in Congjiang County of Guizhou Province on the aroma components of‘Goudang1’,five different altitudes were selected to plant‘Goudang1’in Congjiang County of Guizhou Province from 200 to 900 m,and the contents of available nitrogen,available potassium,available phosphorus,organic matter and pH value were determined,Headspace Solid Phase Microextraction(HS-SPME)and Gas Chromatography-mass spectrometry(GC-MS)were used to analyze the volatile components of‘Goudang1’from different planting sites.The results showed that there were differences in the type s and contents of volatile compounds detected in different planting sites of‘Goudang No.1’,among which 2-acetyl-1-pyrroline(2-AP),an important component affecting rice aroma,had the highest relative contents of available potassium and available phosphorus in the soil of the high planting site,so the aroma of‘Goudang No.1’was the strongest in this planting site.There are many volatile components in‘Goudang No.1’fragrant rice.The relationship between soil characteristics and main volatile components in different planting sites of this fragrant rice variety was studied.The results can provide theoretical basis for the selection of suitable planting sites of this fragrant rice variety and provide reference for the development of fragrant rice production industry.