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以海南省国营大丰农场选育的橡胶树新品种‘大丰95’中低割龄树为材料,采用相关、通径、多元回归分析等方法,研究橡胶产量(Y)与其年均割次株产干胶量(X1)、年割胶刀数(X2)、每公顷有效割株数(X5)等5个相关性状的关系,以及产量构成因素的作用效应。研究表明:3个产量构成因素与产量有紧密的关系,偏回归系数达极显著水平,直接通径效应为较高正值,其中每公顷有效割株数最高,其次是年均割次株产干胶量,第三为年割胶刀数,且年割胶刀数与每公顷有效割株数和年均割次株产干胶量之间的差异达1%显著水平。说明橡胶树‘大丰95’中低割龄高产高效栽培技术途径是:在一定的年割胶刀数基础上,主要考虑每公顷有效割株数和年均割次株产干胶量因素。建立的回归方程(Y=-1 434.745 5+16.113 9X1+8.204 7X2+2.561 7X5)可定量描述该品种产量与其构成因素间的关系。
The results showed that the relationship between rubber yield (Y) and its annual average cutting height was studied by means of correlation, path length and multivariate regression analysis, using the middle and low ridges of Dafeng 95, a new rubber tree species bred in Dafeng Farm of Hainan Province. (X1), the number of plastic knives (X2), the number of effective mulching per hectare (X5) and other five related traits, as well as the effects of yield components. The results showed that the three yield components were closely related to the yield, the partial regression coefficient reached an extremely significant level, and the direct path effect was the higher positive value, of which the effective cutting number per hectare was the highest, followed by the average cutting yield per plant The third is the number of plastic cutter per year, and the difference between the number of plastic cutter per year and the number of effective mulching per hectare and the average dry mulching glue volume per hectare reaches a significant level of 1%. Explain Rubber Tree ’Dafeng 95’ medium and low yielding high-yielding and efficient cultivation techniques is: in a certain number of tapping knife on the basis of the main consideration of the number of effective cutting per hectare and the average yield per plant dry glue volume factors. The established regression equation (Y = -1 434.745 5 + 16.113 9X1 + 8.204 7X2 + 2.561 7X5) can quantitatively describe the relationship between yield and its components.