摘要
【目的】分析不同浓度乙烯利刺激割胶对橡胶树大丰95干胶产量及其相关生理参数的影响,为制定适宜大丰95的割胶制度提供参考依据。【方法】采用S/2d3割制对开割3年后的大丰95并涂施不同浓度(0、0.25%、0.50%和0.75%)的乙烯利,测定分析各处理胶树的干胶产量、干胶含量及胶乳硫醇、蔗糖、无机磷、镁离子含量、排胶初速度和堵塞指数等生理参数。【结果】在0.25%和0.50%乙烯利刺激下大丰95的干胶净增产率分别为15.3%和26.2%,乙烯利刺激浓度为0.75%时干胶产量随刺激浓度增大而增加的趋势不明显,干胶含量开始极显著下降(P<0.01),无机磷持续显著增加(P<0.05,下同),排胶初速度、堵塞指数及硫醇、蔗糖和镁离子含量均下降。采用乙烯利刺激割胶的大丰95干胶含量与乙烯利刺激浓度呈显著负相关(R=-0.8847),干胶产量与乙烯利刺激浓度呈显著正相关(R=0.9705)。【结论】采用S/2d3低频割制配合采用0.25%和0.50%乙烯利刺激开割3年后的大丰95橡胶树可取得较好的增产效应,胶树死皮率未明显增加,对胶树生长的影响也较小,可在大丰95割胶生产上推广应用。
【Objective】In order to provide reference for rubber tree Dafeng95to design appropriate tapping system,rubber yield and physiological parameters related to rubber producing of rubber tree Dafeng95with ethrel stimulation with different concentrations were analyzed.【Method】Rubber tree Dafeng95being tapped for three years were used as material.Dafeng95was tapped with half spiral upward cut every three days(S/2d3),stimulated by ethrel with different concentrations(0,0.25%,0.50%and0.75%).Parameters including dry rubber yield,dry rubber content,contents of latex thiol,sucrose,inorganic phosphorus and magnesium ions,initial flow rate,plugging index under different treatments were analyzed.【Result】The dry rubber net yield increment rate of Dafeng95under0.25%and0.50%ethrel stimulation were15.3%and26.2%respectively,but when the ethrel concentration increased to0.75%,the yield were not increased obviously as the concentration went up,and the dry rubber content were decreased significantly(P<0.01).Inorganic phosphorus content continued rising significantly(P<0.05,the same below),initial flow rate,plugging index,contents of latex thiol,sucrose and magnesium ions were decreased.The dry rubber content of Dafeng95stimulated by ethrel had significantly negative correlations with ethrel concentration(R=-0.8847),and significant positive correlations were found between dry rubber yield and ethrel concentration(R=0.9705).【Conclusion】The low frequency tapping system S/2d3with0.25%and0.50%ethrel stimulation for rubber tree Dafeng95after being tapped for three years can achieve suitable yield increase.The tapping panel dryness rate does not increase obviously.And this tapping system has light impact on rubber tree growth.Therefore it can be applied to planting of rubber tree Dafeng95.
作者
杨文凤
刘汉文
吴明
骆明华
罗世巧
魏芳
仇键
高宏华
校现周
YANG Wen-feng;LIU Han-wen;WU Ming;LUO Ming-hua;LUO Shi-qiao;WEI Fang;QIU Jian;GAO Hong-hua;XIAO Xian-zhou(Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,Danzhou,Hainan 571737,China;Yangjiang Branch,Hainan Natural Rubber Industry(Group)Corporation Limited,Qiongzhong,Hainan 572900,China)
出处
《南方农业学报》
CAS
CSCD
北大核心
2017年第11期2052-2057,共6页
Journal of Southern Agriculture
基金
国家现代农业产业技术体系建设项目(CARS-34-ZP4)
中国热带农业科学院基本业务费专项项目(163002017021)
关键词
橡胶树
大丰95
乙烯利刺激
干胶产量
生理参数
rubber tree
Dafeng 95
ethrel stimulation
dry rubber yield
physiological parameter
