TITLE:
Studies on Rubber (Hevea brasiliensis) Trees Exist Plant Type after Planting and Available Tapping Tree of Rubber Plantation in China
AUTHORS:
Dongling Qi, Jiannan Zhou, Guishui Xie, Zhixiang Wu
KEYWORDS:
Rubber Tree (Hevea brasiliensis), Exist Plant Type, Available Tapping Tree, Rubber Plantations, Different Tapping Years, China
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.20,
September
26,
2014
ABSTRACT:
Existing plant types of rubber tree after planting and available tapping
tree were investigated, and there were about 28 rubber plantations with
different tapping years of 8 varieties “CATAS7-33-97”, “CATAS8-79”, “CATAS7-20-59”, “PR107”, “RRIM600”, “GT1”,
“INA873”, “93-114”in South China. The results showed that
there were six kinds of existing plant types of rubber tree after planting of
rubber plantations, which were available tapping trees, wind damaged trees,
cold damaged trees, tapping panel dryness trees, absent trees and weak trees,
respectively. These data investigated also showed rubber trees under available
tapping, stoppage due to tapping panel dryness, absence, wind damage, cold
damage and weakness were counted and calculated and made up for 72.21%, 14.75%,
5.61%, 3.86%, 2.68% and 1.89%. Tapping panel dryness trees, wind damage and
absent trees are major factors for the loss of tapping rubber trees in the
rubber plantations. Of these investigated varieties, available tapping trees
per 100 trees of rubber plantation of “PR107”at the 1st, 12th, 14th,
16th, 20th, 24th tapping year were 96, 67, 70,
75, 66, 46 trees in Hainan planting zone, respectively. Available tapping trees
per 100 trees of rubber plantation of “RRIM600”at the 9th, 15th, 20th,
22nd tapping year were 88, 62, 55, 36 trees in Yunnan planting zone,
respectively. Available tapping trees per 100 trees of rubber plantation of
“93-114” at the 10th, 19th, tapping year were 94, 62
trees in Guangdong planting zone. These results showed that available tapping
trees of rubber plantation decreased with
increasing tapping age under different planting zones in China.