Relationship between yield and its components in new variety ‘Dafeng 95’ of Hevea brasiliensis at young and middle tapping ages

WU Chuntai, LIU Hanwen, MA Zhengyu, LI Weiguo, HUANG Huasun

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (02) : 63-68.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (02) : 63-68. DOI: 10.3969/j.issn.1000-2006.2015.02.011

Relationship between yield and its components in new variety ‘Dafeng 95’ of Hevea brasiliensis at young and middle tapping ages

  • WU Chuntai1,2,3, LIU Hanwen4, MA Zhengyu4, LI Weiguo1,2,3, HUANG Huasun1,2,3*
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Abstract

A new variety ‘Dafeng 95’ of Hevea brasiliensis at young and middle tapping ages selectively bred by National Dafeng Farm of Hainan Province was used as plant materials. The interrelationship among yield and its five related traits including mean annual dry rubber yield per tree per tapping, the number of tapping per year and the number of tappable trees per hectare etc. was investigated by using correlation, path coefficient and multiple regression analysis, and the relative effects of the yield components on yield in the variety of H. brasiliensis were also studied. The results showed that three yield components were closely related with yield, their partial regression coefficients were up to very significant level, and all of their direct path effects were higher positive value. Among the five factors, direct path effect value of the number of tappable trees per hectare was the highest, followed by mean annual dry rubber yield per tree per tapping and the number of tapping per year. And the difference among the three traits reached up to 1% extremely significant level. The technical solution of high-yielding and high-efficiency cultivation for young and middle tapping aged ‘Dafeng 95’ was suggested as follows: besides the necessary number of tapping per year, the number of tappable trees per hectare and mean annual dry rubber yield per tree per tapping should be highly considered. The regression equation “Y=-1 434.745 5+16.113 9X1+8.204 7X2+2.561 7X5” for quantitatively describing the relationship between yield and its components was feasible.

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WU Chuntai, LIU Hanwen, MA Zhengyu, LI Weiguo, HUANG Huasun. Relationship between yield and its components in new variety ‘Dafeng 95’ of Hevea brasiliensis at young and middle tapping ages[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2015, 39(02): 63-68 https://doi.org/10.3969/j.issn.1000-2006.2015.02.011

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