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硅鈣肥對(duì)百香果品質(zhì)及細(xì)胞壁代謝的影響

2024-12-31 00:00:00柏是林歐斯揚(yáng)楊雪蓮姜春芽陳孝玉龍胡小京
熱帶作物學(xué)報(bào) 2024年8期
關(guān)鍵詞:硅鈣鈣肥硅肥

摘""要:為探明適合貴州低熱河谷地區(qū)栽培百香果的硅鈣肥配比,本研究以欽蜜9號(hào)百香果為試材,試驗(yàn)設(shè)置為花前每株土施硅肥50"g,花后10"d左右噴施鈣肥,間隔15"d噴1次,連續(xù)噴3次,鈣肥濃度為500倍、1000倍、1500倍,以不施肥為對(duì)照。通過對(duì)百香果土施硅肥、花果期噴施鈣肥,探究不同中微肥及其用量對(duì)百香果品質(zhì)及細(xì)胞壁代謝的影響,并篩選最佳硅鈣肥配方,旨在為提高百香果果實(shí)品質(zhì)提供一定的理論依據(jù)和實(shí)踐指導(dǎo)。結(jié)果表明:與對(duì)照相比,土施硅肥+噴施鈣肥1000倍配施能提高百香果的單果重、果實(shí)硬度、果實(shí)縱橫徑,增加果實(shí)的可溶性固形物(TSS)及Vc含量,減少可滴定酸(TA)含量;提高可溶性糖(SS)、可溶性蛋白質(zhì)含量(SP);促進(jìn)過氧化物酶(POD)、超氧化物歧化酶(SOD)、過氧化氫酶(CAT)活性;增加果皮中原果膠和纖維素含量,使水溶性果膠(WSP)含量、纖維素酶(CX)、多聚半乳糖醛酸酶(PG)及果膠甲酯酶(PME)活性下降,且各指標(biāo)與對(duì)照均存在顯著差異。進(jìn)而說明土施硅肥+噴施鈣肥1000倍配施能顯著提高百香果果實(shí)品質(zhì)及果皮機(jī)械強(qiáng)度、韌性及穩(wěn)定性,與對(duì)照相比,果實(shí)單果重、果實(shí)硬度、縱徑、橫徑分別增長(zhǎng)11.15%、27.18%、6.23%、3.29%,TSS、Vc、SS、SP含量分別提高16.95%、16.12%、20.57%、24.55%,TA含量降低36.03%,POD、SOD、CAT活性分別提升13.16%、19.67%、21.65%,果皮中原果膠和纖維素含量分別增加19.29%和17.19%,WSP含量降低10.63%,CX、PG及PME活性分別下降8.58%、22.98%、7.52%。

關(guān)鍵詞:百香果;中微量肥;果實(shí)品質(zhì);細(xì)胞壁代謝中圖分類號(hào):S667.9""""""文獻(xiàn)標(biāo)志碼:A

Effects"of"Silica-calcium"Fertilizer"on"Quality"and"Cell"Wall"Metabolism"of"Passion"Fruit

BAI"Shilin1,"OU"Siyang1,"YANG"Xuelian1,"JIANG"Chunya2,"CHEN"Xiaoyulong3,"HU"Xiaojing1*

1."College"of"Agriculture,"Guizhou"University,"Guiyang,"Guizhou"550025,"China;"2."Teaching"Experiment"Farm,"Guizhou"University,"Guiyang,"Guizhou"550025,"China;"3."College"of"Life"Sciences,"Guizhou"University,"Guiyang,"Guizhou"550025,"China

Abstract:"In"order"to"find"out"the"ratio"of"silicon"and"calcium"fertilizer"suitable"for"the"cultivation"of"passion"fruit"in"the"low-heat"valley"area"of"Guizhou,"this"study"took"passion"fruit"Qinmi"No."9"as"the"test"material."The"experiment"was"conducted"with"50"g"of"silicon"fertilizer"per"plant"before"flowering,"spraying"calcium"fertilizer"about"10"days"after"flowering,"spraying"once"every"15"days,"spraying"three"times"continuously,"and"the"concentration"of"calcium"fertilizer"was"500"times,"1000"times"and"1500"times."CK"was"used"as"the"control"group,"which"received"no"fertilizer"application."The"effects"of"different"medium"and"micro"fertilizers,"as"well"as"dosages,"on"the"quality"and"related"cell"wall"metabolism"indexes"of"passion"fruit"were"explored"by"applying"silicon"fertilizer"to"the"soil"and"spraying"calcium"fertilizer"during"the"flowering"and"fruiting"periods."The"aim"was"to"screen"for"the"best"specialized"silicon-calcium"fertilizer"formula."The"aim"is"to"provide"a"theoretical"basis"and"practical"guidance"for"improving"the"quality"of"passion"fruit."The"results"showed"that"compared"with"the"control,"soil"application"of"silicon"fertilizer"and"spraying"calcium"fertilizer"1000"times"combined"application"increased"the"single"fruit"weight,"fruit"hardness"and"fruit"shape"index"of"passion"fruit."Additionally,"they"elevated"the"content"of"soluble"solids"(TSS)"and"vitamin"C"(Vc),"while"reducing"the"content"of"titratable"acidity"(TA)."Furthermore,"there"was"an"increase"in"soluble"sugar"(SS)"and"soluble"protein"content"(SP)."Peroxidase"(POD),"superoxide"dismutase"(SOD),"and"catalase"(CAT)"activities"were"promoted."However,"the"activities"of"water-soluble"pectin"(WSP)"content,"cellulase"(CX),"polygalacturonase"(PG),"and"pectin"methylesterase"(PME)"decreased"due"to"the"increase"in"protopectin"and"cellulose"in"the"peel,"each"index"was"significantly"different"from"the"control"group."It"shows"that"silicon-calcium"fertilizer"had"the"best"effect"on"enhancing"passion"fruit"quality"and"improving"the"mechanical"strength,"toughness"and"stability"of"peel."Compared"to"CK,"the"single"fruit"weight,"fruit"hardness,"longitudinal"diameter"and"transverse"diameter"increased"by"11.15%,"27.18%,"6.23%"and"3.29%,"respectively."Moreover,"the"contents"of"TSS,"Vc,"SS"and"SP"increased"by"16.95%,"16.12%,"20.57%"and"24.55%,"respectively,"while"the"content"of"TA"decreased"by"36.03%,"and"the"activities"of"POD,"SOD"and"CAT"increased"by"13.16%,"19.67%"and"21.65%,"respectively."The"content"of"protopectin"and"cellulose"in"peel"increased"by"19.29%"and"17.19%,"respectively."Meanwhile,"the"content"of"WSP"decreased"by"10.63%,"and"the"activities"of"CX,"PG"and"PME"decreased"by"8.58%,"22.98%"and"7.52%,"respectively.

Keywords:"passion"fruit;"medium"and"micro"fertilizer;"fruit"quality;"cell"wall"metabolism

DOI:"10.3969/j.issn.1000-2561.2024.08.011

百香果(Passiflora"edulis"Sims)別名西番蓮,屬于西番蓮科多年生草質(zhì)藤本植物[1]。其營(yíng)養(yǎng)價(jià)值極高,富含人體所需的十余種氨基酸、多種維生素、類胡蘿卜素及礦物質(zhì)元素等,有鮮食、油用、藥用等用途,同時(shí)也是一種極具觀賞價(jià)值的園藝植物[2]。百香果生長(zhǎng)速度較快,成熟后果實(shí)口感極佳。百香果易成活,持續(xù)結(jié)果期長(zhǎng),經(jīng)濟(jì)價(jià)值高,見效快,可在我國(guó)適宜種植地區(qū)大力發(fā)展和推廣,應(yīng)用前景十分廣闊[3]。

百香果是貴州十二大特色產(chǎn)業(yè)之一,近年來在黔東南、黔西南等地發(fā)展勢(shì)頭十分迅猛,對(duì)當(dāng)?shù)剜l(xiāng)村振興具有重要意義[4]。欽蜜9號(hào)是黃金百香果的新品種,在貴州主栽區(qū)引種時(shí)間短。該品種花期長(zhǎng),果實(shí)大,果皮呈黃色,有淡淡的蜂蜜味,口感優(yōu),深受消費(fèi)者喜愛。由于百香果長(zhǎng)勢(shì)可觀,當(dāng)年種植當(dāng)年結(jié)果,所以對(duì)肥料的需求量大,特別是在開花、結(jié)果、轉(zhuǎn)色等生長(zhǎng)發(fā)育關(guān)鍵階段[5]。在其生長(zhǎng)發(fā)育中除施以大量元素外,對(duì)中微量元素的需求不可或缺,若缺少中微量元素便會(huì)導(dǎo)致百香果質(zhì)量變差,出現(xiàn)果皮較軟,果實(shí)易衰老、抗性差,易染病等問題,這些都是生產(chǎn)中亟待解決的問題。

前人研究表明,中微量元素作為植物生長(zhǎng)必需的營(yíng)養(yǎng)元素可以平衡植物無機(jī)營(yíng)養(yǎng),提高果實(shí)品質(zhì)和產(chǎn)量,減輕作物病蟲害[6]。硅對(duì)于植物而言是有益元素,它參與細(xì)胞壁構(gòu)成,可以增強(qiáng)其穩(wěn)定性及機(jī)械強(qiáng)度,硅肥作為一種新型肥料,能使植物莖稈更加健壯,植株更結(jié)實(shí),促進(jìn)根系生長(zhǎng)[7-9]。還具有提高果皮的厚度以及硬度,增加果實(shí)韌性,改善植株的機(jī)械性能,提高抗性,增大葉面積以及干物質(zhì)質(zhì)量等作用,且硅肥配施其他肥料對(duì)植物生長(zhǎng)的調(diào)控效果更佳,能有效提高磷、鉀、鈣等養(yǎng)分利用率[10-11]。

鈣是一種重要的礦質(zhì)營(yíng)養(yǎng)元素,補(bǔ)充外源鈣對(duì)植株的生長(zhǎng)發(fā)育,果品采后貯藏等均有積極意義,對(duì)果實(shí)品質(zhì)的形成及其保持有重要作用。葉面施鈣可以有效提高果實(shí)的含鈣量、硬度、可溶性固形物、可溶性總糖以及Vc含量等[12]。

目前,硅鈣肥等中微量元素肥已應(yīng)用于白菜(Brassica"rapa"var."glabra)、黃瓜(Cucumis"sativus)、蘋果(Malus"pumila)等作物上。修文廣[13]研究發(fā)現(xiàn),合理配比的硅、鈣肥與常規(guī)施肥相比,可以促進(jìn)白菜生長(zhǎng)發(fā)育,增加產(chǎn)量,使作物營(yíng)養(yǎng)更加均衡全面。翟江等[14]研究表明,硅、鈣肥均可促進(jìn)日光溫室中黃瓜的生長(zhǎng)發(fā)育,提高干物質(zhì)、可溶性糖、可溶性蛋白質(zhì)含量以及Vc含量,并且硅鈣配施效果更顯著,證明了硅、鈣元素之間存在交互作用。徐謙等[15]研究指出,施硅鈣肥能增加蘋果樹體的硅鈣含量和果皮中鈣的含量,在晚秋或早春與果樹基肥混施,可增加葉片和果皮硅鈣含量,特別是增加鈣的含量,對(duì)復(fù)壯樹勢(shì),提高樹體抗病能力,增加果實(shí)硬度均有積極意義。

當(dāng)前,在我國(guó)部分地區(qū)土壤中有效硅含量低于臨界值(100"mg/kg),已經(jīng)限制了作物產(chǎn)量和品質(zhì)。加之,廣大果農(nóng)不重視鈣肥等的補(bǔ)充,導(dǎo)致果園土壤和樹體營(yíng)養(yǎng)不均衡,影響了果樹的生長(zhǎng),進(jìn)而使得果實(shí)品質(zhì)下降。因此,開展中微肥研究對(duì)提高作物的品質(zhì)具有重要作用。目前,關(guān)于百香果中微肥的相關(guān)研究鮮見報(bào)道。本研究以欽蜜9號(hào)黃金百香果為試材,通過對(duì)百香果土施硅肥、花果期噴施鈣肥,探究不同中微肥及用量對(duì)百香果品質(zhì)和細(xì)胞壁代謝的影響,并篩選適合的中微量肥配方,以期為實(shí)踐生產(chǎn)中科學(xué)合理施用硅、鈣肥,提高百香果果實(shí)品質(zhì)提供一定的科學(xué)依據(jù)。

1""材料與方法

1.1""材料

1.1.1""試驗(yàn)區(qū)概況""試驗(yàn)于2022年3月在貴州省榕江縣古州百香果種植基地(108°04′E,"25°26′N)進(jìn)行。試驗(yàn)地海拔240"m,屬中亞熱帶濕潤(rùn)季風(fēng)氣候。試驗(yàn)地為平地,土層較厚,土質(zhì)疏松,pH為5.6~5.8,灌溉條件良好。土壤有機(jī)質(zhì)含量為43.84"g/kg,速效氮、速效磷、速效鉀含量分別為72.90、82.23、255"mg/kg,全氮、全磷、全鉀含量分別為0.74、0.65、15.53"g/kg。以上土壤理化指標(biāo)參照《土壤農(nóng)化分析》的相關(guān)方法進(jìn)行測(cè)定[16]。

1.1.2""試驗(yàn)材料""試材為欽蜜9號(hào)黃金百香果。硅肥來源于英皇全水溶性顆粒硅肥(SiO2含量≥27%,純硅含量≥12%,英國(guó)植康肥業(yè)有限公司,山西),果蔬糖醇螯合鈣肥來源于美國(guó)豐利惠公司(Ca含量≥140"g/L,美國(guó)豐利惠公司,浙江)。

1.2""方法

1.2.1""試驗(yàn)設(shè)置""設(shè)置5個(gè)處理,P1:土施硅肥;P2:土施硅肥+噴施鈣肥(500倍);P3:土施硅肥+"噴施鈣肥(1000倍);P4:土施硅肥+噴施鈣肥(1500倍);P5:噴施鈣肥(1000倍,參考前期預(yù)試驗(yàn))。以不施肥為對(duì)照(CK)。

每個(gè)處理20株,重復(fù)3次。采用平棚垂簾式,株行距為1.5"m×3.0"m,處理間設(shè)間隔行。于花前土施硅肥一次,每株50"g。于花后10"d左右,開始噴施鈣肥,間隔15"d噴1次,連續(xù)噴3次,噴至葉片表面濕潤(rùn)為止。其他進(jìn)行常規(guī)施肥處理:有機(jī)肥料(N+P2O5+K2O≥10%,有機(jī)質(zhì)≥45%);磷鉀肥(P2O5≥18.0%,"K2O≥1.05%);大量元素水溶肥(N≥11%,"P2O5≥11%,"K2O≥35%,"MgO≥2%)。試驗(yàn)中采用肥水一體化技術(shù)。當(dāng)果實(shí)開始顯色時(shí)采樣,每個(gè)處理隨機(jī)取樣,選取50個(gè)果形均勻、著色一致、無病蟲、無損傷的果實(shí)樣品,分別從樹冠的上中下、前后左右不同部位采集。并將果實(shí)帶回實(shí)驗(yàn)室檢測(cè)相關(guān)指標(biāo),重復(fù)3次,每個(gè)指標(biāo)取其平均值進(jìn)行比較分析。

1.2.2""指標(biāo)測(cè)定與方法""(1)品質(zhì)指標(biāo)。單果重使用CP213型電子天平測(cè)定,單位為g;果實(shí)硬度使用GY-4型數(shù)顯果實(shí)硬度計(jì)測(cè)定,單位為Pa;果實(shí)縱橫徑使用游標(biāo)卡尺測(cè)量,果形指數(shù)為果實(shí)縱徑與橫徑之比;可溶性固形物(TSS)和可滴定酸(TA)含量采用PAL-BX/ACID12型數(shù)顯糖酸度計(jì)測(cè)定,固酸比為可溶性固形物與可滴定酸之比;維生素C(Vc)、可溶性糖(SS)、可溶性蛋白質(zhì)(SP)含量分別采用2,6-二氯靛酚滴定法、蒽酮比色法、考馬斯亮藍(lán)染色法[17]測(cè)定。

(2)細(xì)胞壁代謝指標(biāo)。過氧化物酶(POD)活性:愈創(chuàng)木酚顯色法[17];超氧化物歧化酶(SOD)活性:氮藍(lán)四唑(NBT)光電還原法[17];過氧化氫酶(CAT)活性:紫外吸收法[17];纖維素含量:蒽酮比色法[18];纖維素酶(CX)活性:分光光度法[17];原果膠、水溶性果膠(WSP)含量:咔唑比色法[18];多聚半乳糖醛酸酶(PG)、果膠甲酯酶(PME):分光光度法[18]。

1.3""數(shù)據(jù)處理

利用SPSS"26.0統(tǒng)計(jì)軟件進(jìn)行差異顯著性分析和隸屬函數(shù)分析,采用Microsoft"Excel軟件繪圖。

2nbsp;"結(jié)果與分析

2.1""不同硅鈣肥處理對(duì)百香果果實(shí)外在品質(zhì)的影響

由表1可知,不同硅鈣肥處理對(duì)百香果果實(shí)的單果重、硬度以及縱橫徑均有促進(jìn)作用。P3的單果重較CK顯著提高11.15%,5個(gè)處理之間的果實(shí)單果重差異不顯著,但均顯著高于CK;P3處理的硬度較CK顯著提高27.18%,且P2、P4處理的果實(shí)硬度與CK存在顯著差異,P1、P5處理和CK之間的果實(shí)硬度差異不顯著;P3處理的縱徑較CK顯著提高6.23%,除P5處理與CK的縱徑差異不顯著以外,其余4個(gè)處理與CK均有顯著差異;P3處理的橫徑較CK顯著提高3.29%,其余處理與CK差異不顯著;各處理的果形指數(shù)均在1左右,說明果實(shí)呈圓形。綜上所述,P3(土施硅肥+噴施鈣肥1000倍)處理在促進(jìn)果實(shí)生長(zhǎng)方面效果最顯著。

2.2""不同硅鈣肥處理對(duì)百香果果實(shí)TSS、TA、Vc、SS、SP的影響

可溶性固形物是反映果實(shí)風(fēng)味及耐貯性的重要指標(biāo)之一,可滴定酸及Vc含量等指標(biāo)代表了果實(shí)的風(fēng)味品質(zhì)[19],可溶性糖含量是構(gòu)成果實(shí)口感、風(fēng)味及耐貯性的一個(gè)重要指標(biāo)[20]??扇苄缘鞍踪|(zhì)參與合成部分酶的基礎(chǔ)物質(zhì),參與果實(shí)采后生理生化反應(yīng)的調(diào)控[21]。由表2可知,P3處理的TSS含量為19.70%,較CK提高5.35%,其余處理均與CK差異不顯著。施肥處理的TA含量均低于CK,其中,P4處理的TA含量為0.87%,較CK顯著降低36.03%;P3處理的TA含量為0.98%,

較CK降低27.94%,P3與P4處理的TA含量差異不顯著。P3處理的固酸比達(dá)到20.40,與P4處理差異不顯著,但比CK顯著高46.13%。對(duì)Vc含量而言,P3處理達(dá)到21.97"mg/100"g,分別較CK和P1處理顯著提高4.87%和6.81%。隨著硅鈣肥的增施,P3處理的SS含量為15.41%,較CK顯著提高13.23%,較P1和P5處理分別提高8.29%和6.50%,均達(dá)顯著差異。P3處理的SP含量為2.08"mg/g,較CK增加24.55%,P3處理與P4處理之間差異不顯著,但與其他處理均有顯著差異。綜上說明,P3處理在增加果實(shí)的口感和風(fēng)味方面效果最佳。

2.3""不同硅鈣肥處理對(duì)百香果果實(shí)POD、SOD、CAT活性的影響

由圖1A可知,各處理的POD活性均存在不同程度的差異。P3處理的POD活性為4.16"U/g,較CK高5.49%,P1處理和CK之間差異不顯著,但顯著低于其他處理。SOD能夠清除植物體內(nèi)的超氧自由基。由圖1B可見,各處理的SOD活性同樣存在不同程度的差異。CK與P5處理之間差異不顯著,但顯著低于其他處理。其中,硅鈣配施的P2、P3和P4處理較CK分別提高12.04%、15.73%、8.62%。CAT可以使H2O2分解為水和分子氧,進(jìn)而減少該過程中植物組織可能受到的氧化傷害。從圖1C可知,P3處理的CAT活性最高,達(dá)到4.27"U/g,較CK顯著提高10.72%,其次是同樣為配施的P4處理(4.24"U/g)和P2處理(4.11"U/g),P2、P3和P4處理均顯著高于CK。結(jié)果表明,不同硅鈣肥處理均能顯著提高百香果POD、SOD、CAT等抗氧化酶活性,以P3處理效果最佳。

2.4""不同硅鈣肥處理對(duì)百香果果實(shí)纖維素含量和CX活性的影響

由圖2可知,不同硅鈣肥配施處理后,各處理的百香果纖維素含量和CX活性均存在不同程度的差異。由圖2A可知,纖維素含量隨著鈣肥濃度的增加呈先上升后下降的趨勢(shì)。P3處理的纖維素含量為27.50%,比CK顯著高17.19%,且分別高于單施的P1和P5處理10.89%和13.79%,分別高于配施的P2和P4處理5.50%和5.77%;P3處理與CK及其他處理間存在顯著差異。由圖2B可知,CX活性的變化隨著鈣肥濃度的增加呈先下降后上升的趨勢(shì)。P3處理的CX活性最低,為73.34"U/g,較CK顯著降低8.57%,其次是配施的P2和P4處理,分別是75.80"U/g和78.09"U/g,均顯著低于CK;單施的P1和P5處理均顯著高于P3處理。結(jié)果表明,不同硅鈣肥處理可以提高百香果纖維素含量和降低CX活性,增加果皮機(jī)械強(qiáng)度,硅鈣配施效果優(yōu)于單施,以P3處理的效果最顯著。

2.5""不同硅鈣肥處理對(duì)百香果果實(shí)原果膠、WSP含量的影響

由圖3A可知,施肥對(duì)百香果果皮的原果膠含量有一定的促進(jìn)作用。其中,P3處理的原果膠含量最高,達(dá)到10.70%,比CK顯著高19.29%。P2、P3和P4處理顯著高于CK、P1和P5處理,P1和P5處理與CK無顯著差異。由圖3B可知,P3不同小寫字母表示處理間差異顯著(Plt;0.05)。

處理的WSP含量最低,為1.85%,較CK顯著降低10.63%,其次是P2處理,為1.93%,比CK低6.76%。單施的P1和P5處理與CK間差異不顯著。綜上所述,不同硅鈣肥處理可以提高百香果果皮原果膠含量,降低WSP含量,以P3處理的效果最佳。

2.6""不同處理對(duì)百香果PG及PME活性的影響

果膠酶屬于復(fù)合酶,也是分解果實(shí)果膠物質(zhì)多種酶的總稱,包含多聚半乳糖醛酸酶和果膠甲酯酶等。由圖4A可知,不同硅鈣肥處理的PG活性均顯著低于CK。P3處理的PG活性最低,為4.38"U/g,較CK降低22.98%,且均顯著低于其他處理。P2和P4處理之間差異不顯著,但顯著低于P1和P5處理。由圖4B可知,不同硅鈣配施處理后,各處理百香果的PME活性存在不同程度的差異,P3處理的PME活性最低,為81.90"U/g,較CK顯著下降7.52%,且P3處理與其他處理均存在顯著差異,而P1和P5處理較CK雖有差異但未達(dá)顯著。結(jié)果表明,不同硅鈣肥處理可以降低百香果果皮的PME和PG活性,從而降低了果膠物質(zhì)的分解率,防止果皮皺裂及損傷,有利于貯運(yùn),配施效果好于單施,以P3處理的效果最為顯著。

2.7""隸屬函數(shù)綜合評(píng)價(jià)

單項(xiàng)數(shù)據(jù)并不能科學(xué)、完整、準(zhǔn)確地反映不同處理對(duì)百香果影響的效果差異,故選擇關(guān)鍵性的指標(biāo)采用隸屬函數(shù)進(jìn)行綜合評(píng)價(jià)。如表3所示,所有處理的排序結(jié)果為:P3gt;P4gt;P2gt;P5gt;P1gt;CK。其中,P3處理的隸屬函數(shù)值為0.99,排序第一,其次為P4處理,其隸屬函數(shù)值為0.69,第三為P2處理,其隸屬函數(shù)值為0.56,P5和P1分別位列第四、第五,CK排在第六,其隸屬函數(shù)值為0.06。由此得知P3處理下百香果的各指標(biāo)綜合表現(xiàn)最好,且硅鈣配施比單施效果好。

3""討論

3.1""不同硅鈣肥處理對(duì)百香果品質(zhì)性狀的影響

單果重、果形指數(shù)、硬度等果實(shí)外在品質(zhì)性狀可以反映樹體肥水供應(yīng)狀況及環(huán)境等外界因素對(duì)果實(shí)造成的影響。本研究得出硅鈣肥單施及配施均對(duì)百香果的單果重、果實(shí)縱橫徑、硬度有積極影響,與葉素銀等[22]研究證明硅鈣處理后對(duì)梨(Pyrus"spp)果實(shí)外在品質(zhì)有顯著提高的結(jié)果相似。

TTS、TA、Vc"3個(gè)指標(biāo)是衡量果實(shí)風(fēng)味及口感的重要指標(biāo)。SS、SP作為植物中重要的滲透調(diào)節(jié)物質(zhì),在維持細(xì)胞滲透壓和降低細(xì)胞滲透勢(shì)方面有著重要意義,可溶性蛋白質(zhì)含量說明了植物生命活動(dòng)的代謝水平[23]。已有研究表明,鈣、硅肥施用可顯著提高果實(shí)可溶性固形物、可滴定酸、Vc含量及可溶性糖、可溶性蛋白質(zhì)等內(nèi)在品質(zhì)性狀[24-26]。車紅偉等[27]指出硅鈣肥混施對(duì)水稻(Oryza"sativa"L.)營(yíng)養(yǎng)生長(zhǎng)、提高其產(chǎn)量及品質(zhì)具有一定促進(jìn)作用。

本研究表明,對(duì)百香果樹體進(jìn)行不同硅鈣配施處理,對(duì)其品質(zhì)性狀指標(biāo)具有顯著影響。硅鈣肥對(duì)百香果的單果重、果實(shí)縱橫徑、TSS、Vc、SS、SP、固酸比等指標(biāo)均有不同程度的促進(jìn)作用。且硅鈣配施的效果大于單施。這與翟江等[14]在黃瓜上的研究結(jié)果相似,即硅鈣單施和二者配施均可促進(jìn)黃瓜植株生長(zhǎng),本研究中P3處理(土施硅肥+葉面鈣肥1000倍)的促進(jìn)效果最好。

3.2""不同硅鈣肥處理對(duì)百香果細(xì)胞壁代謝的影響

抗氧化酶類包含POD、SOD、CAT,是植物抗氧化過程中重要的3種參與酶類,通過協(xié)同作用來防御活性氧或其他過氧化物自由基對(duì)細(xì)胞膜系統(tǒng)的傷害,從而減少有機(jī)體遭受自由基的毒害,對(duì)維持自由基產(chǎn)生與清除之間的平衡至關(guān)重要,可以保護(hù)果實(shí)免受生物或非生物脅迫而引起的氧化損傷,植物體內(nèi)抗氧化酶的活性高低可以說明植物對(duì)環(huán)境的適應(yīng)和抗衰老能力的強(qiáng)弱[28-29]。熊博等[30]研究證明柑橘(Citrus"reticulata)葉面、果面噴鈣肥能有效提高CAT、POD和SOD活性,說明柑橘果實(shí)活性氧代謝與鈣素營(yíng)養(yǎng)密切相關(guān)。夏杏洲等[31]指出,橙(C."sinensis)經(jīng)鈣處理后保護(hù)了細(xì)胞組織結(jié)構(gòu),脂質(zhì)過氧化程度得到減輕,延緩了果實(shí)的衰老。耿若飛等[32]指出,葉面噴施硅肥可以上調(diào)抗氧化系統(tǒng)相關(guān)酶的表達(dá)量,增加抗氧化酶活性及抗氧化物質(zhì)含量。王壯偉等[29]指出,加施硅鈣肥可減緩葡萄果實(shí)成熟后果實(shí)品質(zhì)的變化,降低葡萄果實(shí)中的丙二醛含量和多酚氧化酶活性。本研究也表明硅鈣肥對(duì)百香果的抗氧化酶活性有促進(jìn)作用,與前人研究結(jié)果一致。

纖維素有支撐骨架的作用,并參與植物細(xì)胞壁組成。在CX作用下,纖維素逐步被水解并最終生成β-葡萄糖[33]。纖維素含量對(duì)果蔬品質(zhì)和貯藏性影響較大,在抗機(jī)械損傷、抗病蟲害方面具有重要作用。果膠物質(zhì)屬于植物膠,主要成分為多聚半乳糖醛酸,果實(shí)細(xì)胞含有大量果膠物質(zhì)(中膠層和初生壁),能黏結(jié)細(xì)胞個(gè)體[34]。果膠是維持植物結(jié)構(gòu)和硬度的關(guān)鍵,有調(diào)節(jié)細(xì)胞的滲透性及pH的作用。當(dāng)果實(shí)尚未成熟時(shí),纖維素和果膠物質(zhì)呈結(jié)合狀,以原果膠形式存在。原果膠可使果實(shí)變得堅(jiān)實(shí)脆硬且不可溶于水,果實(shí)成熟時(shí),果膠物質(zhì)與纖維素逐漸分離,轉(zhuǎn)變?yōu)橐兹苡谒乃苄怨z,果肉組織細(xì)胞間隙變大、軟化,硬度下降[33]。王玲利等[35]研究指出,葉面施鈣在一定濃度范圍內(nèi)與果實(shí)中纖維素、原果膠等含量呈極顯著正相關(guān)。本研究結(jié)果與前人相似,進(jìn)一步證明硅鈣肥可以提高細(xì)胞壁機(jī)械強(qiáng)度以及穩(wěn)定性,增強(qiáng)耐貯性。

百香果在栽培中存在果皮較軟、貯藏難、抗逆差等問題[36]。而過氧化物酶、超氧化物歧化酶、過氧化氫酶、纖維素含量、纖維素酶活性、原果膠含量等都是解決上述問題的重要指標(biāo)。本研究表明,硅鈣肥對(duì)百香果果實(shí)抗氧化酶活性、纖維素含量、原果膠含量均有明顯的促進(jìn)作用,其中硅鈣配施的效果大于單施。本研究結(jié)果與葉素銀等[22]的結(jié)論相似,進(jìn)而證明鈣硅配施可以提高果肉中SOD和POD活性,有增強(qiáng)活性氧清除能力的作用,有利于提高果實(shí)抗性及細(xì)胞膜完整性。同時(shí),還能防止膜脂過氧化。隨著果實(shí)的生長(zhǎng)發(fā)育,鈣硅配施處理的細(xì)胞壁中的水解酶活性,如多聚半乳糖醛酸酶活性和纖維素酶活性顯著低于CK。在果實(shí)成熟時(shí),果實(shí)中的原果膠含量均高于CK,而水溶性果膠含量低于CK。這些都印證了硅鈣肥對(duì)提高果實(shí)糖代謝,抗氧化及增強(qiáng)細(xì)胞壁機(jī)械強(qiáng)度有促進(jìn)作用,且硅鈣配施效果比硅鈣單施效果好。

4""結(jié)論

本研究以欽蜜9號(hào)黃金百香果為試材,通過對(duì)百香果土施硅肥、花果期噴施鈣肥,探究不同中微肥及用量對(duì)百香果果實(shí)品質(zhì)及果皮相關(guān)酶活性指標(biāo)的影響。結(jié)果表明,與CK相比,P3(土施硅肥+噴施鈣肥1000倍)處理能提高百香果的單果重、果實(shí)縱橫徑、硬度,增加果實(shí)的TSS、Vc、SS、SP含量,降低果實(shí)TA含量;促進(jìn)POD、SOD、CAT活性;增加果皮中原果膠和纖維素含量,并降低WSP含量,使CX、PG及PME活性下降,各指標(biāo)達(dá)顯著差異。綜上,土施硅肥+噴施鈣肥1000倍配施為百香果花果期施硅鈣肥的最適配方,該處理能促進(jìn)果實(shí)內(nèi)營(yíng)養(yǎng)物質(zhì)的積累,改善果品品質(zhì),提高細(xì)胞壁物質(zhì)代謝,增強(qiáng)果實(shí)果皮機(jī)械強(qiáng)度、硬度等,有利于提升百香果的采后耐貯性。

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  • 唐語(yǔ)琪,"楊其軍,"冼淑顏,"劉萌,"吳斌."百香果產(chǎn)業(yè)支撐鄉(xiāng)村振興的現(xiàn)狀與對(duì)策建議[J]."中國(guó)農(nóng)業(yè)文摘:"農(nóng)業(yè)工程,"2021,"33(3):"31-32."TANG"Y"Q,"YANG"Q"J,"XIAN"S"Y,"LIU"M,"WU"B."Current"situation"and"countermeasures"of"passion"fruit"industry"supporting"rural"revitalization[J]."Agricultural"Science"and"Engineering"in"China,"2021,"33(3):"31-32."(in"Chinese)
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[10]"張峰,"李養(yǎng)義,"張曉東,"李世強(qiáng)."硅鈣肥對(duì)庫(kù)爾勒香梨果實(shí)品質(zhì)的影響[J]."中國(guó)農(nóng)學(xué)通報(bào),"2020,"21(4):"56-60.ZHANG"F,"LI"Y"Y,"ZHANG"X"D,"LI"S"Q."Effects"of"silicon-calcium"fertilizer"on"fruit"quality"of"Korla"fragrant"pear[J]."Chinese"Agricultural"Science"Bulletin,"2020,"21(4):"56-60."(in"Chinese)

[11]"馬肖,"劉木蘭,"王峰,"張秋平."緩釋肥與硅肥配施對(duì)油菜產(chǎn)量及菌核病抗性的影響[J]."湖南農(nóng)業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版),"2022,"48(2):"144-150.MA"X,"LIU"M"L,"WANG"F,"ZHANG"Q"P."Effects"of"combined"application"of"slow-release"fertilizer"and"silicon"fertilizer"on"rapeseed"yield"and"resistance"to"Sclerotinia"sclerotiorum[J]."Journal"of"Hunan"Agricultural"University"(Natural"Sciences),"2022,"48(2):"144-150."(in"Chinese)

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[19]"吳永飛,"胡小京,"楊雪蓮."不同葉面鈣肥處理對(duì)“黑珍珠”櫻桃貨架期保鮮的影響研究[J]."綠色科技,"2021,"23(15):"5-7,"11.WU"Y"F,"HU"X"J,"YANG"X"L."Effects"of"different"foliar"calcium"fertilizer"treatments"on"shelf-life"preservation"of"‘Black"Pearl’"cherries[J]."Journal"of"Green"Science"and"Technology,"2021,"23(15):"5-7,"11."(in"Chinese)

[20]"王步天,"施學(xué)東,"杜華波,"張鳳英,"吳斌,"葛宇."三個(gè)主栽百香果品種果實(shí)和種子性狀差異分析[J]."熱帶農(nóng)業(yè)科學(xué),"2023,"43(1):"21-24.WANG"B"T,"SHI"X"D,"DU"H"B,"ZHANG"F"Y,"WU"B,"GE"Y."Difference"analysis"of"fruit"and"seed"traits"among"three"main"cultivars"of"passion"fruit[J]."Chinese"Journal"of"Tropical"Agriculture,"2023,"43(1):"21-24."(in"Chinese)

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[24]"魏成熙,"歐陽(yáng)昌亭,"朱正國(guó)."水稻施用硅鈣肥的效果研究[J]."耕作與栽培,"1993,"2(3):"49-51.WEI"C"X,"OUYANG"C"T,"ZHU"Z"G."Study"on"the"effect"of"silicon-calcium"fertilizer"on"rice[J]."Tillage"and"Cultivation,"1993,"2(3):"49-51."(in"Chinese)

[25]"張麗陽(yáng),"史振聲,"王志斌,"李鳳海,"王瑩,"胡海軍."硅鈣肥對(duì)爆裂玉米品質(zhì)和生理指標(biāo)的影響分析[J]."種子,"2009,"4(4):"21-23.ZHANG"L"Y,"SHI"Z"S,"WANG"Z"B,"LI"F"H,"WANG"Y,"HU"H"J."Analysis"of"the"effect"of"silicon-calcium"fertilizer"on"the"quality"and"physiological"indexes"of"popcorn[J]."Seed,"2009,"4(4):"21-23."(in"Chinese)

[26]"任旭喜,"肖千明,"婁春榮,"孫文濤,"高秀蘭."硅鈣肥對(duì)玉米抗旱生理指標(biāo)及產(chǎn)量的影響[J]."國(guó)外農(nóng)學(xué)—雜糧作物,"1998,"18(3):"1-4."REN"X"X,"XIAO"Q"M,"LOU"C"R,"SUN"W"T,"GAO"X"L."Effects"of"silicon-calcium"fertilizer"on"drought"resistance"physiological"indexes"and"yield"of"maize[J]."Rain"Fed"Crops,"1998,"18(3):"1-4."(in"Chinese)

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[28]"文良娟,"毛慧君,"張?jiān)海?李英軍."西番蓮果皮成分分析及其抗氧化活性的研究[J]."食品科學(xué),"2008,"29(11):"54-58.WEN"L"J,"MAO"H"J,"ZHANG"Y"C,"LI"Y"J."Study"on"the"composition"analysis"and"antioxidant"activity"of"passion"fruit"peel[J]."Food"Science,"2008,"29(11):"54-58."(in"Chinese)

[29]"王壯偉,"黃學(xué)熹,"王博,"吳偉民,"王西成,"錢亞明."鈣肥和硅肥對(duì)葡萄留樹保鮮效果的影響[J]."中國(guó)野生植物資源,"2020,"39(1):"9-13.WANG"Z"W,"HUANG"X"X,"WANG"B,"WU"W"M,"WANG"X"C,"QIAN"Y"M."Effects"of"calcium"fertilizer"and"silicon"fertilizer"on"the"preservation"of"grape"trees"[J]."Chinese"Wild"Plant"Resources,"2020,"39(1):"9-13."(in"Chinese)

[30]"熊博,"汪志輝,"廖鳳玲,"范茜茜,"李立佼,"王曉曉."鈣對(duì)黃果柑果實(shí)3種抗氧化酶活性的影響[J]."植物科學(xué)學(xué)報(bào),"2014,"32(2):"168-173.XIONG"B,"WANG"Z"H,"LIAO"F"L,"FAN"Q"Q,"LI"L"J,"WANG"X"X."Effects"of"calcium"on"the"activities"of"three"antioxidant"enzymes"in"Huangguogan"fruits[J]."Plant"Science"Journal,"2014,"32(2):"168-173."(in"Chinese)

[31]"夏杏洲,"吳雪彪,"張?jiān)銎妫?董慶兵,"梁振全."鈣處理對(duì)紅江橙采后貯藏品質(zhì)影響的研究[J]."保鮮與加工,"2009,"9(5):"9-14."XIA"X"Z,"WU"X"B,"ZHANG"Z"Q,"DONG"Q"B,"LIANG"Z"Q."Effects"of"calcium"treatment"on"postharvest"storage"quality"of"Hongjiang"orange[J]."Storage"and"Process,"2009,"9(5):"9-14."(in"Chinese)

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[34]"劉運(yùn)花,"黃葦,"郭美媛,"黃妙云."西番蓮果皮中果膠的復(fù)合酶法提取工藝研究[J].nbsp;食品工業(yè)科技,"2017,"38(18):"117-122,"128.LIU"Y"H,"HUANG"W,"GUO"M"Y,"HUANG"M"Y."Study"on"the"extraction"process"of"pectin"from"passion"fruit"peel"by"compound"enzymatic"method[J]."Science"and"Technology"of"Food"Industry,"2017,"38(18):"117-122,"128."(in"Chinese)

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