丛林式橡胶园栽培试验初报

Preliminary Report on Cultivation Experiments on Jungle Rubber Plantation

进行了建立丛林式胶园复合生态系统的可行性及构建形式研究。结果表明:与纯橡胶林生态系统(常规胶园)相比,丛林式胶园复合生态系统的胶树茎围增长率、胶园土壤化学性质等方面均无显著差异;共生树种———竹柏生长正常。在1.5、2.0、3.0m这3种株距之间,竹柏的株高、茎粗增长量均无显著差异,故竹柏株距以1.5m为宜。竹柏的高生长和粗生长存在着极显著的相关关系,4a中株高Y和离地5cm处的直径X的关系式为Y=90.71+61.25X。

Basedon conventionalrubber plantations,the feasibility and patterns for construction of jungle rubber plantation complexecosystemswere studied.Theresults showedthat there were not significant differ ences in aspects such as t he rubber tree girth increase rate and the chemicalproperties of the soil between the jungle rubber plantation complexecosystem,with Podocarpus nagi as a symbiotictree,and the pure rubber plantation ecosystem(conventionalrubber plantation);the symbiotic tree Podocarpus nagi grew normally.There were no significant differences in plant height and girth increase rate in the plant spaces of1.5,2.0and3.0m.Therefore,the suitable plant space for Podocarpus nagi was1.5m.There was extremelysignificant correlation betweenheight growth and girth growth of Podocarpus nage.The relation betweenPodocarpus nagi plant height (Y)and the diameter5cmabove the ground(X)in4years was Y=90.71+61.25X.