橡胶树PR107产量与其构成因素的相关及通径分析  

Correlation and path analysis on yield of Hevea brasiliensis PR107 and its components

作　　者：吴春太[1,2,3] 马征宇 刘汉文 李维国[1,2,3] 黄华孙[1,2,3] 

机构地区：[1]中国热带农业科学院橡胶研究所,海南儋州571737 [2]国家橡胶树育种中心,海南儋州571737 [3]农业部橡胶树生物学与遗传资源利用重点实验室,海南儋州571737 [4]海南天然橡胶产业集团阳江分公司,海南琼中572900

出　　处：《中南林业科技大学学报》2014年第12期46-51,共6页Journal of Central South University of Forestry & Technology

基　　金："十二五"国家天然橡胶产业技术体系抗风高产育种岗位专项(CARS-34);973计划课题"橡胶树产排胶调控机制与转基因种质创新"(2012CB723005)

摘　　要：为给橡胶优良品种丰产栽培技术提供科学依据,以2008年大丰农场不同割龄橡胶树良种PR107生产性试验的数据为材料,通过产量与产量构成因素的相关、多元回归和通径分析,研究橡胶产量与其构成因素的相关程度,和各构成因素对产量贡献的相对大小。研究表明,产量构成因素与产量有着密切的关系,偏回归系数达极显著水平,直接通径效应为较大正值,这与偏相关分析结果一致,其中每公顷有效割株数的直接通径系数和相关系数最大,其次是年均割次株产干胶量,年割胶刀数较小。若要实现PR107单位面积干胶年产量的进一步提高,结合品种特性和海南省生态条件及目前种植条件特点,通过增加每公顷有效割株数可显著提高橡胶产量;通过适当增加年割胶刀数和确保年均割次株产干胶量基本平稳,亦能在每公顷有效割株数偏少时获得较高的产量。上述3因素是此品种高产栽培的主攻方向。利用回归方程(Y=-4 138.977 4+19.283 2X1+38.772 2X2+5.437 0X5)去定量描述产量及其构成因素间的关系并预测产量,理论上是可行的。To reveal the relations between yield and its components and the relative contribution of yield components to yield, by using the productive test data during 2008, the correlation, multiple regression and path analysis were conducted on the yield and its components of fine Hevea brasiliensis clone PR107 with 19 kinds of tapping ages in Nation-owned Dafeng Farm. Data for high- yield cultivation technique of elite Hevea brasiliensis variety was obtained. The results show that the yield components were closely related with the yields, their partial regression coefficients were up to very significant level, and all of their direct path effects were higher positive value, which was consistent with the results of partial correlation analysis. Among them, the direct path effect value of the number of tappable trees per hectare was the highest of 5 factors, and the mean annual dry rubber yield per tree per tapping took second place, and the number of tapping per year was relative less. Combining clone characteristics and ecological conditions in Hainan Province and current characteristics of growing conditions, increasing the number of tappable trees per hectare can improve significantly annual dry rubber yield per unit area in PR107. Properly increasing the number of tapping per year and keeping mean annual dry rubber yield per tree per tapping basically stable can also obtain higher yield from lower number of tappable trees per hectare. Three factors mentioned above was the main direction of high yield cultivation. The regression equations for forecasting yield from mean annual dry rubber yield per tree per tapping, the number of tapping per year, and the number oftappable trees per hectare are feasible in theory.

关 键 词：橡胶树 PR107 产量构成因素 相关分析 通径分析 

分 类 号：S794.1[农业科学—林木遗传育种]