TITLE:
Effect of Lime Application to Acidic Soils on Oleoresin Yield Tapped from Pine Plantations in South China
AUTHORS:
Run-Peng Wei, Ruchun Yang, Qiaowen Wei
KEYWORDS:
Pine, Acidic Soil, Lime, Oleoresin Production, Site Management
JOURNAL NAME:
Open Journal of Forestry,
Vol.4 No.4,
July
31,
2014
ABSTRACT: Oleoresin is a major
non-forest product collected from commercially mature or near mature pine
trees. Efforts have been made to increase oleoresin yield, but basically
limited to the genetic improvement of planting materials and the application of
chemical stimulants to tapping surface of trees. Nutrition management may play
a role, particularly for pine stands suffering from soil acidification and
degradation. We set up a field experiment including application of water
retainer, NPK complex fertilizer, lime and borax in different combinations to
pine stands for oleoresin tapping with extremely low soil pH value and
nutrition. Lime significantly affected the annual yield of oleoresin tapped
from two pine species studied (P P > 0.10). In addition, all of the
four matters applied did not influence the
growth of both pine species. We concluded that proper use of lime alone may
generate 15% to 35% of gain in oleoresin production for pine plantations
with similar soil conditions in the region. We also discussed the potential of
comprehensive soil or site management, and proposed further research for
improvement of pine oleoresin production.