乙烯利调控橡胶树胶乳产量和品质的阈值分析

刘明洋, 杨洪, 樊松乐, 郭冰冰, 代龙军, WITTAYA Prommee, 王立丰

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森林工程 ›› 2025, Vol. 41 ›› Issue (03) : 538-545. DOI: 10.7525/j.issn.1006-8023.2025.03.010
森林资源建设与保护

乙烯利调控橡胶树胶乳产量和品质的阈值分析

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Threshold Analysis of Ethephon to Control the Yield and Quality of Latex of Hevea brasiliensis

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摘要

分析乙烯利(ETH)、乙烯利抑制剂1-甲基环丙烯(1-MCP)和半胱氨酸(CYS)对橡胶树胶乳产量和主要品质指标的影响,并计算剂量阈值。采用优化的正交试验设计分析三因素(ETH,1-MCP,CYS),四水平(3种试剂各4个含量),共14个处理,用于涂施橡胶割面橡胶树割面,分别测定橡胶树胶乳产量、干胶含量(干含)、分子量、塑性初值、塑性保持率和门尼黏度等关键指标,并分析指标之间的相关性。结果表明,14个处理橡胶树后产量、干含等均存在显著差异。相关分析表明数均分子量与重均分子量、门尼黏度正相关,相关系数分别为0.71和0.83,与多分散性负相关,相关系数为-0.91。塑性初值与门尼黏度正相关,相关系数为0.73。多分散性与门尼黏度负相关,相关系数为-0.89。分别建立以干含等指标为核心的回归方程,计算出的乙烯利的最高体积分数是0.15%,1-MCP的最高体积分数是1.08%,CYS的质量浓度是0.41 g/L。优化的正交试验方法可有效地计算排胶调节剂的阈值,为后续试验提供理论和实践指导。

Abstract

The effects of ethephon (ETH), ethephon inhibitor 1-methylcyclopropene (1-MCP) and cysteine (CYS) on the yield and main quality indexes of rubber tree latex were analyzed, and the dosage threshold was calculated. An optimized orthogonal experimental design was used to analyze 14 treatments with three factors (ETH, 1-MCP, CYS) and four levels (four concentrations of each reagent) for applying rubber tree cut surfaces. Key indicators such as rubber latex yield, dry rubber content, molecular weight, initial plasticity value, plasticity retention index and Mooney viscosity were measured, and the correlation between the indicators was analyzed. The results showed that there were significant differences in yield and dry rubber content of 14 treated rubber trees. Correlation analysis showed that the number-average molecular weight was positively correlated with the weight-average molecular weight and Mooney viscosity, and the correlation coefficient was 0.71 and 0.83, respectively, and the correlation coefficient was negative with the polydispersity indexes, and the correlation coefficient was -0.91. Initial plasticity value was positively correlated with Mooney viscosity, and the correlation coefficient was 0.73. The polydispersity indexes was negatively correlated with Mooney viscosity with the correlation coefficient -0.89. The regression equations based on dry rubber content index were established respectively. The maximum concentration of ethephon, 1-MCP and CYS were 0.15%, 1.08% and 0.41 g/L, respectively. The optimized orthogonal test method can effectively calculate the threshold of the regulator and provide theoretical and practical guidance for the subsequent experiments.

关键词

橡胶树 / 乙烯利 / 1-甲基环丙烯 / 阈值 / 相关分析

Key words

Hevea brasiliensis / ethephon / 1-methylcyclopropene / theshold / correlation analysis

中图分类号

S794.1

引用本文

导出引用
刘明洋 , 杨洪 , 樊松乐 , . 乙烯利调控橡胶树胶乳产量和品质的阈值分析. 森林工程. 2025, 41(03): 538-545 https://doi.org/10.7525/j.issn.1006-8023.2025.03.010
LIU Mingyang, YANG Hong, FAN Songle, et al. Threshold Analysis of Ethephon to Control the Yield and Quality of Latex of Hevea brasiliensis[J]. Forest Engineering. 2025, 41(03): 538-545 https://doi.org/10.7525/j.issn.1006-8023.2025.03.010

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基金

海南省重大科技计划项目(ZDKJ2021004)
中央级公益性科研院所基本科研业务费专项(1630022024004)

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