不同产区辣椒果实品质差异及其与气象因子的相关性

Difference of pepper fruit quality in different planting areas and its correlation with meteorological factors

  • 摘要: 【目的】 探讨不同产区的不同辣椒品种品质差异,并解析品质指标与气象因子之间的相关性,为提升辣椒品质提供参考依据。【方法】 在3个产区(新疆乌鲁木齐、贵州麻江和湖南长沙)种植2个朝天椒品种(遵辣9号、卓椒新52)和2个线椒品种(辣研12号、大方皱椒),采集果实测定辣椒红素、还原糖、总氨基酸、粗脂肪、粗纤维、辣椒素和二氢辣椒素等7个品质指标,结合各产区的8个气象因子,采用差异性分析、相关分析和主成分分析综合评价辣椒果实营养品质及其与气象因子的关系。【结果】 同一辣椒品种在不同产区的果实品质指标存在明显差异;3个产区中,线椒的辣椒红素含量以新疆种植最高,朝天椒的辣椒素和二氢辣椒素含量均以贵州种植最高;线椒和朝天椒的粗脂肪含量均以湖南种植最高,粗纤维含量均以新疆种植最高。对4个辣椒品种果实的7个品质指标进行相关分析,其中辣椒素与二氢辣椒素呈极显著正相关(P<0.01,下同),相关系数达0.98;辣椒红素与粗脂肪呈极显著负相关,相关系数为0.66。根据各主成分的贡献率可知,第一主成分的特征值为2.662、贡献率为38.032%,其中载荷系数最高的是二氢辣椒素,其次是辣椒素。4个品种在3个产区种植的品质综合评价结果显示,大方皱椒的排序为新疆>贵州>湖南,其他3个品种排序均为贵州>湖南>新疆。果实品质与气象因子的相关分析结果显示,年平均温度、生长季最低温度、生长季总降水量、生长季相对湿度均与还原糖和粗脂肪呈极显著正相关;生长季日照时数、生长季平均昼夜温差与粗纤维呈显著正相关(P<0.05,下同);生长季最高温度与辣椒红素、辣椒素和二氢辣椒素呈极显著负相关,与还原糖呈显著负相关。【结论】 辣椒品质的形成受基因型和环境共同影响,生产上应根据各产区生境条件种植适栽辣椒品种以确保果实品质。

     

    Abstract: 【Objective】 The quality differences of different pepper varieties in different planting areas were studied, and the correlation between quality indexes and meteorological factors was analyzed,which provided reference for improving the quality of pepper. 【Method】 In this study,2 pod peppers(Zunla 9,Zhuojiaoxin 52)and 2 line peppers (Layan 12,Dafang wrinkled pepper)planted in 3 different areas(Wulumuqi of Xinjiang,Majiang of Guizhou and Changsha of Hunan)were used to determine 7 quality indexes,including capsanthin,reducing sugar,total amino acids, crude fat,crude fiber,capsaicin and dihydrocapsaicin. Combined with 8 meteorological factors in each planting area,the nutritional quality of pepper and its relationship with environmental factors were comprehensively evaluated by difference analysis,correlation analysis and principal component analysis. 【Result】 There were great differences in the fruit quality indexes of the same pepper variety in different planting areas. Among them,line pepper planted in Xinjiang had the highest capsanthin content,while pod pepper in Guizhou had the highest capsaicin and dihydrocapsaicin contents;crude fat contents in line pepper and pod pepper were the highest in Hunan,crude fiber content was the highest in Xinjiang. The correlation analysis on 7 quality indexes of 4 pepper varieties was analyzed. The results showed that there was extremely significant positive correlation between capsaicin and dihydrocapsaicin(P<0.01,the same below),and the correlation coeffi‐ cient was 0.98. Capsanthin was significantly and negatively correlated with crude fat,and the correlation coefficient was 0.66. According to the contribution rate of each principal component,the eigenvalue of the first principal component was 2.662,and the contribution rate was 38.032%;among which,the highest load factor was dihydrocapsaicin,followed by capsaicin. The comprehensive evaluation results of the 4 varieties planted in 3 different planting areas showed Xinjiang> Guizhou>Hunan in Dafang wrinkled pepper,and Guizhou>Hunan>Xinjiang in the other 3 pepper varieties. The results of correlation analysis between fruit quality and meteorological factors showed that average annual temperature,the lowest temperature in the growing season,the total precipitation in the growing season,and the relative humidity in the growing season were extremely significantly and positively correlated with reducing sugar and crude fat. There was significant positive correlation between sunshine hours in the growing season and the average diurnal temperature difference in the growing season and crude fiber(P<0.05,the same below). The highest temperature in the growing season was extremely significantly and negatively correlated with capsanthin,capsaicin and dihydrocapsaicin,and significantly negatively correlated with reducing sugar. 【Conclusion】 The quality of pepper is affected by genotype and environment. In production, the suitable pepper varieties should be planted according to the habitat conditions of each planting area to ensure the quality of pepper fruit.

     

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