乙烯利調控橡膠樹膠乳產量和品質的閥值分析

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中圖分類號：S794.1 文獻標識碼：A DOI：10.7525/j.issn.1006-8023.2025.03.010

Abstract：The efects of ethephon（ETH），ethephon inhibitor1-methylcyclopropene（1-MCP）and cysteine（CYS）on the yieldand mainquality indexes of rubber tree latex were analyzed，and the dosage threshold was calculated.Anoptimized orthogonal experimental design was used to analyze 14 treatments with threefactors （ETH，1-MCP，CYS）and fourlevels （four concentrations of each reagent）for applying rubber treecut surfaces.Keyindicators such as rubber latex yield，dryrubbercontent，molecular weight，initial plasticityvalue，plasticityretention indexand Mooneyviscositywere measured，andthecorrelationbetween the indicators wasanalyzed.Theresultsshowed thatthere were significant diffrences inyieldand dryrubbercontentof14 treatedrubber trees.Correlationanalysis showed thatthe numberaverage molecular weight was positivelycorrelated with the weight-average molecular weightand Mooney viscosity，and thecorrelationcoefficientwasO.71andO.83，respectively，andthecorrelationcoeicientwas negativewiththepolydispersity indexes，and the correlation coefficient was - 0 . 9 1 . Initial plasticity value was positively correlated with Mooney viscosity，andthecorelationcoeficientwasO.73.ThepoldispersityindexesasnegativelyorrelatedwithMooeyvis cosity with the correlation coefficient - 0 . 8 9 .The regression equations based on dry rubber content index were established respectively. The maximum concentration of ethephon，1-MCP and CYS were 0 . 1 5 % ，1. 0 8 % and 0 . 4 1 g / L ，respectively.Theoptimizedorthogonaltestmethodcaneffctivelycalculate thethresholdof theregulatorand provide theoretical and practical guidance for the subsequent experiments.

Keywords：Hevea brasiliensis；ethephon；1-methylcyclopropene；theshold;correlation analysis

0 引言

橡膠樹是大戟科（Euphorbiaceae）橡膠樹屬（Hevea）的高大喬木，其最初來自南美洲亞馬孫河流域，自20世紀后半葉以來，在中國的海南和云南引種栽培[1]。（剩余12060字）