摘要:【目的】探討不同產(chǎn)區(qū)的不同辣椒品種品質(zhì)差異,并解析品質(zhì)指標(biāo)與氣象因子之間的相關(guān)性,為提升辣椒品質(zhì)提供參考依據(jù)?!痉椒ā吭?個(gè)產(chǎn)區(qū)(新疆烏魯木齊、貴州麻江和湖南長(zhǎng)沙)種植2個(gè)朝天椒品種(遵辣9號(hào)、卓椒新52)和2個(gè)線椒品種(辣研12號(hào)、大方皺椒),采集果實(shí)測(cè)定辣椒紅素、還原糖、總氨基酸、粗脂肪、粗纖維、辣椒素和二氫辣椒素等7個(gè)品質(zhì)指標(biāo),結(jié)合各產(chǎn)區(qū)的8個(gè)氣象因子,采用差異性分析、相關(guān)分析和主成分分析綜合評(píng)價(jià)辣椒果實(shí)營(yíng)養(yǎng)品質(zhì)及其與氣象因子的關(guān)系?!窘Y(jié)果】同一辣椒品種在不同產(chǎn)區(qū)的果實(shí)品質(zhì)指標(biāo)存在明顯差異;3個(gè)產(chǎn)區(qū)中,線椒的辣椒紅素含量以新疆種植最高,朝天椒的辣椒素和二氫辣椒素含量均以貴州種植最高;線椒和朝天椒的粗脂肪含量均以湖南種植最高,粗纖維含量均以新疆種植最高。對(duì)4個(gè)辣椒品種果實(shí)的7個(gè)品質(zhì)指標(biāo)進(jìn)行相關(guān)分析,其中辣椒素與二氫辣椒素呈極顯著正相關(guān)(Plt;0.01,下同),相關(guān)系數(shù)達(dá)0.98;辣椒紅素與粗脂肪呈極顯著負(fù)相關(guān),相關(guān)系數(shù)為0.66。根據(jù)各主成分的貢獻(xiàn)率可知,第一主成分的特征值為2.662、貢獻(xiàn)率為38.032%,其中載荷系數(shù)最高的是二氫辣椒素,其次是辣椒素。4個(gè)品種在3個(gè)產(chǎn)區(qū)種植的品質(zhì)綜合評(píng)價(jià)結(jié)果顯示,大方皺椒的排序?yàn)樾陆甮t;貴州gt;湖南,其他3個(gè)品種排序均為貴州gt;湖南gt;新疆。果實(shí)品質(zhì)與氣象因子的相關(guān)分析結(jié)果顯示,年平均溫度、生長(zhǎng)季最低溫度、生長(zhǎng)季總降水量、生長(zhǎng)季相對(duì)濕度均與還原糖和粗脂肪呈極顯著正相關(guān);生長(zhǎng)季日照時(shí)數(shù)、生長(zhǎng)季平均晝夜溫差與粗纖維呈顯著正相關(guān)(Plt;0.05,下同);生長(zhǎng)季最高溫度與辣椒紅素、辣椒素和二氫辣椒素呈極顯著負(fù)相關(guān),與還原糖呈顯著負(fù)相關(guān)?!窘Y(jié)論】辣椒品質(zhì)的形成受基因型和環(huán)境共同影響,生產(chǎn)上應(yīng)根據(jù)各產(chǎn)區(qū)生境條件種植適栽辣椒品種以確保果實(shí)品質(zhì)。
關(guān)鍵詞:辣椒;品種;產(chǎn)區(qū);氣象因子;品質(zhì)差異
中圖分類(lèi)號(hào):S641.3文獻(xiàn)標(biāo)志碼:A文章編號(hào):2095-1191(2024)09-2763-09
Difference of pepper fruit quality in different planting areas and its correlation with meteorological factors
FU Wen-ting,WANG Nan-yi,ZHOU Peng,YANG Ya,PENG Shi-qing,HUANG Dong-fu,HE Jian-wen*
(Pepper Research Institute,Guizhou Academy of Agricultural Sciences,Guiyang,Guizhou 550006,China)
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 im-proving 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 differenceanalysis,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 con-tents inline pepper and pod pepper were the highest in Hunan,crude fiber content was the highest in Xinjiang.The corre-lation analysis on 7 quality indexes of 4 pepper varieties was analyzed.The results showed that there was extremely sig-nificant positive correlation between capsaicin and dihydrocapsaicin(Plt;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 Xinjianggt;Guizhougt;Hunan in Dafang wrinkled pepper,and Guizhougt;Hunangt;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 posi-tive correlation between sunshine hours in the growing season and the average diurnal temperature difference in the gro-wing season and crude fiber(Plt;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 cor-related 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 qua-lityof pepper fruit.
Key words:pepper;variety;planting area;meteorological factors;quality difference
Foundation items:Guizhou Science and Technology Support Plan Project(QKHZC〔2022〕Zhongdian 016);Key Core Technology Research Project of Mountain Agriculture in Guizhou(GZNYGJHX-2023008);Guizhou Pepper In-dustry Technology System Construction Project(GZLJCYJSTX-02)
0引言
【研究意義】辣椒(Capsicum annuum L.)是我國(guó)重要的蔬菜和調(diào)味品,其果實(shí)富含辣椒素、維生素、可溶性多糖和抗氧化物質(zhì)等多種成分(Tundiset al.,2013;Whiting et al.,2014),具有很高的營(yíng)養(yǎng)價(jià)值(付文婷等,2018)。辣椒果實(shí)品質(zhì)與辣椒品種(Samira et al.,2013;王雪雅等,2018)及種植產(chǎn)地的光照、降水量、氣溫、海拔等因素(Cuadra-Crespo and del Amor,2010;Oh and Koh,2019;Sran and Jindal,2022;Das et al.,2023)密切相關(guān)。因此,深入研究辣椒品質(zhì)與其品種及產(chǎn)地氣象條件的關(guān)系,對(duì)于利用地理環(huán)境提升辣椒品質(zhì)具有重要意義?!厩叭搜芯窟M(jìn)展】目前有關(guān)影響辣椒品質(zhì)形成的因素研究主要集中在品種、產(chǎn)地和水肥處理等(Jang et al.,2023;程立坤等,2024)。在品種和產(chǎn)地方面,王雪梅等(2020)研究不同產(chǎn)地鮮辣椒發(fā)酵郫縣豆瓣,發(fā)現(xiàn)產(chǎn)品品質(zhì)指標(biāo)存在差異,提出按不同產(chǎn)地及產(chǎn)品特性選擇辣椒原材料發(fā)酵郫縣豆瓣的觀點(diǎn);彭粲等(2021)對(duì)不同產(chǎn)地和品種的線條辣椒的辣椒紅素、辣椒素及揮發(fā)性物質(zhì)進(jìn)行分析,結(jié)果表明,產(chǎn)地對(duì)美國(guó)紅類(lèi)辣椒的辣椒紅素和香味組分影響更顯著,而品種是二荊條類(lèi)辣椒素和香味組分的主要影響因素;陳菊等(2023)將4個(gè)品種辣椒種植在地標(biāo)區(qū)和非地標(biāo)區(qū)后,通過(guò)分析辣椒果實(shí)揮發(fā)性風(fēng)味成分發(fā)現(xiàn),同一品種因種植地不同而含有特殊的揮發(fā)性風(fēng)味物質(zhì),地標(biāo)品種辣椒與其在非地標(biāo)地區(qū)種植后的揮發(fā)性物質(zhì)有差異;陶興林等(2023)研究發(fā)現(xiàn),不同地理標(biāo)志辣椒富含營(yíng)養(yǎng)類(lèi)型和含量存在一定差異,脂肪、反式辣椒紅素、可溶性糖、硒、維生素C、辣椒堿和胡蘿卜素等7個(gè)指標(biāo)在干制辣椒加工過(guò)程中發(fā)揮重要作用;楊梅等(2024)采用相關(guān)分析和偏最小二乘法判別分析(PLS-DA)2種分析法對(duì)不同類(lèi)型土壤(重慶紫色土、成都水稻土)辣椒的辣椒素、維生素C、游離氨基酸和揮發(fā)性成分進(jìn)行鑒定,結(jié)果表明,水稻土辣椒的辣椒素質(zhì)量分?jǐn)?shù)顯著高于紫色土辣椒,紫色土辣椒的游離氨基酸質(zhì)量分?jǐn)?shù)顯著高于水稻土辣椒。在栽培處理方面,Zamljen等(2020)研究不同水分灌溉處理對(duì)2個(gè)辣椒品種產(chǎn)量和品質(zhì)的影響,結(jié)果表明,在適宜的灌溉條件下,能提高一年生辣椒Chili-AS Rot的維生素C和總酚含量,以及中國(guó)辣椒Naga Morich的辣椒素、二氫辣椒素和總酚含量,而干旱脅迫能提高辣椒Chili-AS Rot的辣椒素和二氫辣椒素含量;袁巧麗等(2022)研究發(fā)現(xiàn),不同施肥處理對(duì)辣椒生長(zhǎng)影響顯著,復(fù)合肥與有機(jī)肥配施對(duì)辣椒的增產(chǎn)提質(zhì)起關(guān)鍵作用;Brezeanu等(2022)研究發(fā)現(xiàn),有機(jī)栽培方式可提高10個(gè)辣椒品種的β-胡蘿卜素和番茄紅素含量?!颈狙芯壳腥朦c(diǎn)】前人研究多集中于品種和產(chǎn)地土質(zhì)及施肥等對(duì)辣椒果實(shí)品質(zhì)的影響,而結(jié)合產(chǎn)地氣象因子研究辣椒果實(shí)品質(zhì)的報(bào)道較少?!緮M解決的關(guān)鍵問(wèn)題】以種植于湖南長(zhǎng)沙、新疆烏魯木齊和貴州麻江3個(gè)產(chǎn)區(qū)的4個(gè)辣椒品種為研究對(duì)象,采集果實(shí)測(cè)定其辣椒紅素、還原糖、總氨基酸、粗脂肪、粗纖維、辣椒素和二氫辣椒素等7個(gè)營(yíng)養(yǎng)品質(zhì)指標(biāo),結(jié)合3個(gè)產(chǎn)區(qū)的8個(gè)氣象因子,運(yùn)用差異性分析、相關(guān)分析和主成分分析對(duì)各個(gè)產(chǎn)區(qū)的辣椒營(yíng)養(yǎng)品質(zhì)進(jìn)行分析評(píng)價(jià),探究不同產(chǎn)區(qū)辣椒品種品質(zhì)差異及其與氣象因子之間的關(guān)系,為提升辣椒品質(zhì)提供參考依據(jù)。
1材料與方法
1.1試驗(yàn)材料
2022年9月采集種植于湖南長(zhǎng)沙(28°27′47″N,113°20′32.44″E,海拔55 m)、新疆烏魯木齊(44°81′96″N,87°57′96″E,海拔917.9 m)和貴州麻江(26°41′78″N,107°72′20″E,海拔759 m)的2個(gè)朝天椒品種(遵辣9號(hào)、卓椒新52)和2個(gè)線椒品種(辣研12號(hào)、大方皺椒)為試驗(yàn)材料,選取每個(gè)品種長(zhǎng)勢(shì)一致的植株10株,采集中間層大小一致、無(wú)病蟲(chóng)害、充分紅熟的果實(shí),置于烘箱100℃殺青30 min,再65℃烘干至恒重,去果柄粉碎后過(guò)60目篩保存待測(cè)。
1.2氣象數(shù)據(jù)
3個(gè)產(chǎn)區(qū)2022年氣象數(shù)據(jù)資料均由貴州省山地環(huán)境氣候研究所提供。對(duì)各產(chǎn)區(qū)年平均溫度,以及生長(zhǎng)季(3—9月)的平均溫度、最低溫、最高溫、晝夜溫差、相對(duì)濕度、總降水量和日照時(shí)數(shù)等8項(xiàng)氣象指標(biāo)進(jìn)行統(tǒng)計(jì)與整理,其中降水量和日照時(shí)數(shù)計(jì)算3—9月累積值,其余指標(biāo)計(jì)算均值。
1.3測(cè)定指標(biāo)及方法
辣椒紅素含量參照李甜甜等(2021)的方法進(jìn)行測(cè)定;辣椒素和二氫辣椒素含量參照GB/T 21266—2007《辣椒及辣椒制品中辣椒素類(lèi)物質(zhì)測(cè)定及辣度表示方法》進(jìn)行測(cè)定;還原糖含量采用蒽酮比色法(高俊鳳,2006)進(jìn)行測(cè)定;粗纖維含量采用GB/T5009.10—2003《植物類(lèi)食品中粗纖維的測(cè)定》的濾袋法進(jìn)行測(cè)定,粗脂肪含量參照GB 5009.6—2016《食品安全國(guó)家標(biāo)準(zhǔn)食品中脂肪的測(cè)定》進(jìn)行測(cè)定,總氨基酸含量采用茚三酮顯色法(楊宇等,2022)進(jìn)行測(cè)定。
1.4統(tǒng)計(jì)分析
各指標(biāo)均重復(fù)測(cè)定3次,取平均值。采用Excel 2010進(jìn)行數(shù)據(jù)處理,SPSS 26.0進(jìn)行差異顯著性分析、相關(guān)分析及主成分分析。
2結(jié)果與分析
2.1不同產(chǎn)區(qū)辣椒果實(shí)品質(zhì)分析與評(píng)價(jià)結(jié)果
2.1.1不同產(chǎn)區(qū)辣椒果實(shí)品質(zhì)指標(biāo)差異性分析結(jié)果對(duì)種植在3個(gè)產(chǎn)區(qū)的4個(gè)辣椒品種的7個(gè)品質(zhì)指標(biāo)進(jìn)行分析,結(jié)果(表1)顯示,相同辣椒品種在不同地區(qū)種植,其品質(zhì)指標(biāo)均存在不同程度的差異。
2.1.1.1辣椒紅素線椒大方皺椒和辣研12號(hào)的辣椒紅素含量在3個(gè)產(chǎn)區(qū)排序均為新疆gt;貴州gt;湖南,且最高值是最低值的近5.7倍;朝天椒卓椒新52的辣椒紅素含量在3個(gè)產(chǎn)地排序則為貴州gt;新疆gt;湖南,三者間差異顯著(rlt;0.05,下同);朝天椒遵辣9號(hào)的辣椒紅素含量在新疆與貴州間差異不顯著(rgt;0.05,下同),平均含量為60.54μg/g,但二者顯著高于湖南種植的含量(19.42μg/g)。
2.1.1.2總氨基酸線椒大方皺椒的總氨基酸含量在3個(gè)產(chǎn)區(qū)排序?yàn)樾陆甮t;貴州gt;湖南,三者間存在顯著差異;線椒辣研12號(hào)和朝天椒卓椒新52的總氨基酸含量排序?yàn)橘F州gt;湖南gt;新疆,其中線椒辣研12號(hào)的總氨基酸含量在3個(gè)產(chǎn)區(qū)間差異顯著,朝天椒卓椒新52則在湖南與新疆間差異不顯著;朝天椒遵辣9號(hào)的總氨基酸含量在3個(gè)產(chǎn)區(qū)間無(wú)顯著差異,平均總氨基酸含量為43.02μmol/g。
2.1.1.3還原糖線椒辣研12號(hào)的還原糖含量在3個(gè)產(chǎn)區(qū)以貴州種植的最高(14.59 mg/g),湖南與新疆無(wú)顯著差異;朝天椒遵辣9號(hào)的還原糖含量在3個(gè)產(chǎn)區(qū)排序?yàn)楹蟝t;貴州gt;新疆,三者間存在顯著差異;線椒大方皺椒的還原糖含量在3個(gè)產(chǎn)區(qū)排序?yàn)樾陆甮t;貴州gt;湖南;朝天椒卓椒新52的還原糖含量在貴州與湖南間無(wú)顯著差異,但二者顯著高于新疆,新疆種植的卓椒新52還原糖含量?jī)H為6.53 mg/g。
2.1.1.4粗脂肪和粗纖維4個(gè)辣椒品種在3個(gè)產(chǎn)區(qū)的粗脂肪含量排序均為湖南gt;貴州gt;新疆,其粗脂肪含量分別在16.93%~18.27%、13.83%~16.38%和9.55%~13.37%。朝天椒卓椒新52和遵辣9號(hào)的粗纖維含量排序均為新疆gt;湖南gt;貴州,其中卓椒新52的粗纖維平均含量(28.26%)高于遵辣9號(hào)(25.44%);線椒大方皺椒和辣研12號(hào)的粗纖維含量排序則為新疆gt;貴州gt;湖南;4個(gè)品種的粗纖維含量均在3個(gè)產(chǎn)區(qū)存在顯著差異。
2.1.1.5辣椒素和二氫辣椒素朝天椒卓椒新52和遵辣9號(hào)的辣椒素和二氫辣椒素含量在3個(gè)產(chǎn)區(qū)排序均為貴州gt;新疆gt;湖南,除種植在湖南和新疆的遵辣9號(hào)辣椒素含量無(wú)顯著差異外,其他產(chǎn)區(qū)間均存在顯著差異;貴州種植的線椒辣研12號(hào)的辣椒素和二氫辣椒素含量與湖南無(wú)顯著差異,但顯著高于種植在新疆產(chǎn)區(qū),辣椒素和二氫辣椒素含量分別是新疆的4.0和5.7倍;3個(gè)產(chǎn)區(qū)的大方皺椒辣椒素和二氫辣椒素含量均較低,含量在0.01~0.28 g/kg,各產(chǎn)區(qū)間均無(wú)顯著差異。
2.1.2不同產(chǎn)區(qū)辣椒品質(zhì)指標(biāo)的相關(guān)分析結(jié)果
對(duì)4個(gè)辣椒品種果實(shí)的7個(gè)品質(zhì)指標(biāo)進(jìn)行相關(guān)分析,結(jié)果(圖1)顯示,總氨基酸與辣椒素呈顯著正相關(guān),粗纖維與辣椒素和二氫辣椒素呈極顯著正相關(guān)(Plt;0.01,下同),還原糖與總氨基酸和粗脂肪呈極顯著正相關(guān),辣椒素與二氫辣椒素呈極顯著正相關(guān),且二者的相關(guān)系數(shù)最高(0.98);粗脂肪與粗纖維呈顯著負(fù)相關(guān),辣椒紅素與粗脂肪呈極顯著負(fù)相關(guān),相關(guān)系數(shù)為0.66;其他辣椒果實(shí)品質(zhì)指標(biāo)間均未達(dá)顯著相關(guān)水平。
2.1.3不同產(chǎn)區(qū)辣椒果實(shí)品質(zhì)指標(biāo)的主成分分析結(jié)果由圖1可知,果實(shí)品質(zhì)指標(biāo)之間具有相關(guān)性,但部分指標(biāo)間相關(guān)性不顯著,說(shuō)明指標(biāo)之間會(huì)存在部分?jǐn)?shù)據(jù)重疊現(xiàn)象,因此,對(duì)不同產(chǎn)區(qū)4個(gè)品種辣椒果實(shí)的7個(gè)品質(zhì)指標(biāo)進(jìn)行主成分分析,進(jìn)一步篩選出影響果實(shí)品質(zhì)的主要理化指標(biāo)。由表2可知,第一主成分(PC1)的特征值為2.662、貢獻(xiàn)率為38.032%,其中載荷系數(shù)最高的是二氫辣椒素,其次是辣椒素,表明PC1主要反映果實(shí)辣味相關(guān)的信息;第二主成分(PC2)的特征值為1.896、貢獻(xiàn)率為27.091%,主要反映粗脂肪、還原糖和總氨基酸的相關(guān)果實(shí)營(yíng)養(yǎng)品質(zhì)信息;第三主成分(PC3)的特征值為1.412、貢獻(xiàn)率為20.170%,主要反映辣椒紅素的相關(guān)果實(shí)顏色信息。主成分分析得到3個(gè)主成分特征值均大于1.000,累計(jì)貢獻(xiàn)率達(dá)85.293%,表明3個(gè)主成分能反映7個(gè)品質(zhì)指標(biāo)大部分的信息。
2.1.4不同產(chǎn)區(qū)辣椒果實(shí)品質(zhì)綜合評(píng)價(jià)結(jié)果利用3個(gè)主成分得分(F1、F2、F3)及權(quán)重構(gòu)造綜合得分(F)評(píng)價(jià)模型。以特征值為權(quán)重構(gòu)建3個(gè)主成分的得分表達(dá)式:
F1=0.276X1+0.107X2+0.302X3-0.147X4+0.422X5+0.551X6+0.564X7
F2=-0.264X1+0.559X2+0.370X3+0.625X4-0.267X5+0.122X6+0.068X7
F3=0.631X1+0.390X2+0.392X3-0.332X4-0.226X5-0.264X6-0.253X7
F=0.3803F1+0.2709F2+0.2017F3
式中,F(xiàn)1、F2和F3分別表示PC1、PC2和PC3得分,X1~X7分別表示不同產(chǎn)區(qū)辣椒果實(shí)的辣椒紅素、還原糖、總氨基酸、粗脂肪、粗纖維、辣椒素和二氫辣椒素經(jīng)標(biāo)準(zhǔn)化處理后的值。
7個(gè)果實(shí)品質(zhì)指標(biāo)的各個(gè)主成分得分及綜合得分見(jiàn)表3。綜合得分越高的品種則品質(zhì)表現(xiàn)越好,卓椒新52、遵辣9號(hào)和辣研12號(hào)在3個(gè)產(chǎn)區(qū)的綜合評(píng)價(jià)結(jié)果均為貴州gt;湖南gt;新疆;大方皺椒在3個(gè)產(chǎn)區(qū)的綜合評(píng)價(jià)結(jié)果為新疆gt;貴州gt;湖南。
2.2辣椒果實(shí)品質(zhì)與不同產(chǎn)區(qū)氣象因子之間的相關(guān)分析結(jié)果
2.2.1不同產(chǎn)區(qū)主要?dú)庀笠蜃拥谋容^對(duì)不同產(chǎn)區(qū)氣象因子數(shù)據(jù)進(jìn)行分析,結(jié)果(表4)顯示,3個(gè)產(chǎn)區(qū)的年平均溫度和生長(zhǎng)季平均溫度均表現(xiàn)為湖南gt;貴州gt;新疆;貴州和湖南的生長(zhǎng)季最低溫度相同,新疆的生長(zhǎng)季最低溫度為-7.9℃,生長(zhǎng)季最高溫度表現(xiàn)為湖南gt;新疆gt;貴州;生長(zhǎng)季晝夜溫差表現(xiàn)為新疆gt;湖南gt;貴州;生長(zhǎng)季總降水量表現(xiàn)為湖南gt;貴州gt;新疆,生長(zhǎng)季相對(duì)濕度表現(xiàn)為貴州gt;湖南gt;新疆;生長(zhǎng)季日照時(shí)數(shù)表現(xiàn)為新疆gt;湖南gt;貴州。
2.2.2果實(shí)品質(zhì)與氣象因子的相關(guān)性對(duì)不同產(chǎn)區(qū)4個(gè)辣椒品種的7個(gè)品質(zhì)指標(biāo)與8個(gè)氣象因子進(jìn)行相關(guān)分析,結(jié)果(表5)顯示,年平均溫度、生長(zhǎng)季平均溫度、生長(zhǎng)季最低溫度、生長(zhǎng)季總降水量、生長(zhǎng)季相對(duì)濕度與辣椒紅素和粗纖維呈顯著或極顯著負(fù)相關(guān);年平均溫度、生長(zhǎng)季最低溫度、生長(zhǎng)季總降水量、生長(zhǎng)季相對(duì)濕度均與還原糖和粗脂肪呈極顯著正相關(guān),生長(zhǎng)季平均溫度與粗脂肪呈極顯著正相關(guān);生長(zhǎng)季日照時(shí)數(shù)、生長(zhǎng)季平均晝夜溫差與粗脂肪和還原糖呈極顯著負(fù)相關(guān),與辣椒素呈顯著負(fù)相關(guān),與粗纖維呈顯著正相關(guān);生長(zhǎng)季最高溫度與辣椒紅素、辣椒素和二氫辣椒素呈極顯著負(fù)相關(guān),與還原糖呈顯著負(fù)相關(guān)。
3討論
3.1不同產(chǎn)區(qū)辣椒品質(zhì)分析
不同產(chǎn)區(qū)同一辣椒品種和同一產(chǎn)區(qū)不同辣椒品種的綜合品質(zhì)均有差異,不僅是基因型差異造成,還與氣象因子、土壤質(zhì)量等環(huán)境條件有著密不可分的關(guān)系(梁銀麗等,2011;王楠藝等,2022;Pi?ero etal.,2022;肖何等,2023)。本研究將4個(gè)辣椒品種種植于3個(gè)產(chǎn)區(qū),其品質(zhì)指標(biāo)存在明顯差異,通過(guò)主成分分析可知,在貴州種植卓椒新52、遵辣9號(hào)和辣研12號(hào)3個(gè)品種的果實(shí)品質(zhì)綜合性狀較優(yōu),其辣椒紅素和粗脂肪含量適中,粗纖維含量較低,辣椒素和二氫辣椒素含量較高;3個(gè)品種在湖南種植的綜合性狀居中,其粗脂肪含量高、粗纖維含量適中,辣椒紅素、辣椒素和二氫辣椒素含量低;而大方皺椒在新疆的品質(zhì)綜合性狀最佳,其辣椒紅素、總氨基酸和還原糖含量高,辣椒素和二氫辣椒素含量適中,粗脂肪含量低,與趙海云(2015)研究得出丘北小椒種植在文山2種不同環(huán)境下的8個(gè)品質(zhì)指標(biāo)均有明顯差異的結(jié)果類(lèi)似。結(jié)合本研究中3個(gè)產(chǎn)區(qū)的氣象因子,貴州的生長(zhǎng)季最高溫度、生長(zhǎng)季晝夜溫差和生長(zhǎng)季日照時(shí)數(shù)在3個(gè)產(chǎn)區(qū)最低,年平均溫度、生長(zhǎng)季平均溫度和生長(zhǎng)季總降水量適中,生長(zhǎng)季相對(duì)濕度高,說(shuō)明貴州的氣候適宜形成高品質(zhì)辣椒,在貴州種植的大部分辣椒品種品質(zhì)綜合性狀較好;以上研究結(jié)果也表明同一辣椒品種在不同產(chǎn)區(qū)種植對(duì)辣椒品質(zhì)影響較大。由此可知,同一辣椒品種種植于不同產(chǎn)區(qū),其品質(zhì)有不同程度的差異。
辣椒果實(shí)在發(fā)育過(guò)程中,品質(zhì)之間存在一定相關(guān)性。本研究中,辣椒素與二氫辣椒素、粗纖維與辣椒素和二氫辣椒素、還原糖與粗脂肪和總氨基酸均呈極顯著正相關(guān),與劉周斌等(2021)研究5種基因型辣椒果實(shí)品質(zhì),得出游離氨基酸濃度與4種糖含量呈顯著或極顯著正相關(guān)的結(jié)果一致,而與周鵬等(2023)研究貴州25個(gè)辣椒品種品質(zhì),得出還原糖與總氨基酸呈顯著負(fù)相關(guān)的結(jié)果不一致;辣椒紅素與粗脂肪呈極顯著負(fù)相關(guān),粗脂肪與粗纖維呈顯著負(fù)相關(guān),與周鵬等(2023)研究得出辣椒紅素與還原糖和總氨基酸呈顯著負(fù)相關(guān),還原糖與粗纖維和粗脂肪呈顯著正相關(guān)的結(jié)果不一致,可能與品種、果實(shí)發(fā)育時(shí)期及不同產(chǎn)區(qū)導(dǎo)致果實(shí)品質(zhì)和品質(zhì)間的相關(guān)性不同有關(guān)。以上研究結(jié)果說(shuō)明辣椒果實(shí)品質(zhì)之間存在一定的內(nèi)在聯(lián)系,在選育高品質(zhì)辣椒新品種時(shí),可綜合考慮多種品質(zhì)指標(biāo)之間的相關(guān)性,以達(dá)到提高辣椒品質(zhì)的目的。
3.2不同產(chǎn)區(qū)辣椒品質(zhì)與氣象因子的關(guān)系
氣象因子是決定果實(shí)品質(zhì)的重要因素之一,氣象因子主要包括溫度、降水和光照。本研究在對(duì)不同產(chǎn)區(qū)種植的辣椒果實(shí)品質(zhì)進(jìn)行差異性分析和綜合評(píng)價(jià)的基礎(chǔ)上,進(jìn)一步對(duì)品質(zhì)指標(biāo)與氣象因子進(jìn)行相關(guān)分析。結(jié)果表明,年平均溫度、生長(zhǎng)季平均溫度、生長(zhǎng)季最低溫度、生長(zhǎng)季總降水量、生長(zhǎng)季相對(duì)濕度與辣椒紅素和粗纖維呈顯著或極顯著負(fù)相關(guān),與李甜甜等(2021)報(bào)道辣椒紅素對(duì)溫度敏感,長(zhǎng)時(shí)間處于高溫60℃以上會(huì)降解的結(jié)果一致;此外,紅光可促進(jìn)辣椒紅素相關(guān)基因表達(dá)和辣椒紅素合成積累(李甜甜等,2021;雷建軍等,2023),本研究中辣椒紅素與生長(zhǎng)季日照時(shí)數(shù)和晝夜溫差呈正相關(guān),說(shuō)明日照時(shí)數(shù)越長(zhǎng)、晝夜溫差越大,越容易增加辣椒紅素的積累形成(Pola et al.,2020)。年平均溫度、生長(zhǎng)季平均溫度、生長(zhǎng)季最低溫度、生長(zhǎng)季總降水量、生長(zhǎng)季相對(duì)濕度與粗脂肪呈極顯著正相關(guān),與李為萍等(2015)報(bào)道灌水量增加有利于油葵籽仁粗脂肪、亞油酸及不飽和脂肪酸形成的觀點(diǎn)一致;生長(zhǎng)季日照時(shí)數(shù)、生長(zhǎng)季平均晝夜溫差與粗纖維呈顯著正相關(guān),粗纖維屬于干物質(zhì)的一種,其積累與溫周期變化有關(guān),晝夜溫差大有利于干物質(zhì)的積累(張恩讓等,2006);年平均溫度、生長(zhǎng)季最低溫度、生長(zhǎng)季總降水量、生長(zhǎng)季相對(duì)濕度與還原糖呈極顯著正相關(guān),而生長(zhǎng)季最高溫度與還原糖呈顯著負(fù)相關(guān),生長(zhǎng)季日照時(shí)數(shù)、生長(zhǎng)季平均晝夜溫差與還原糖呈極顯著負(fù)相關(guān),說(shuō)明平均溫度高、總降水量多、濕度大、生長(zhǎng)季最低溫度低有利于還原糖的積累,日照長(zhǎng)、晝夜溫差大、最高溫度高反而降低還原糖,與樊曉蕓等(2022)研究得出板栗可溶性糖與生長(zhǎng)季溫差和生長(zhǎng)季日照時(shí)數(shù)均呈極顯著正相關(guān),孫佳等(2023)研究得出若羌地區(qū)光照時(shí)間相對(duì)更充足,紅棗果實(shí)硬核期溫度相對(duì)較高,有利于可溶性糖含量增加的結(jié)果相反,其原因可能在于物種不同的差異或分析中的誤差。本研究中,生長(zhǎng)季最高溫度、生長(zhǎng)季日照時(shí)數(shù)、生長(zhǎng)季平均晝夜溫差與辣椒素和二氫辣椒素呈負(fù)相關(guān),與王寧等(2016)研究發(fā)現(xiàn)高溫、溫差大不利于辣椒素和二氫辣椒素積累的結(jié)果一致。
綜上說(shuō)明,氣象因子中溫度和水分可促使辣椒還原糖和粗脂肪積累,日照和晝夜溫差促使纖維素積累,而溫度因子中最高溫度不利于辣椒紅素、辣椒素、二氫辣椒素和還原糖的積累。
4結(jié)論
種植在3個(gè)產(chǎn)區(qū)的4個(gè)辣椒品種的品質(zhì)指標(biāo)存在明顯差異,辣椒品質(zhì)的形成受基因型和環(huán)境共同影響,生產(chǎn)上應(yīng)根據(jù)各產(chǎn)區(qū)生境條件種植適栽辣椒品種以確保果實(shí)品質(zhì)。
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(責(zé)任編輯 羅麗)
南方農(nóng)業(yè)學(xué)報(bào)2024年9期