Page 7 - ผลกระทบระยะยาวของการปลูกยางพาราต่อสมบัติดินและความหลากหลายทางชีวภาพในดิน Long Term Impact of Rubber Plantation on Soil Properties and Biodiversity

ห้องสมุดกรมพัฒนาที่ดิน

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Thesis Title Long Term Impact of Rubber Plantation on Soil Properties
and Biodiversity

Author Miss Phantip Panklang
Major Program Plant Science

Academic Year 2020

ABSTRACT

Nowadays, the impact of rubber plantation (RP) remains a debatable
issue, but few studies take into account the soil biodiversity. In the South of Thailand,

rubber plantation has been planted since 1901, but the long term impact on soil

biodiversity has not been studied yet. The aim of this study was to assess the long
term impact of continuous rubber monoculture plantations on soil biodiversity and

some properties of soil from three successive rubber tree rotations in Ban Nasan

district, Suratthani province compared with forest in the area of Tai Rom Yen national
park. The results indicated that the land use change from forest to rubber plantation

caused the increasing of soil bulk density. While, soil organic matter, total carbon, total

nitrogen, available potassium, calcium and magnesium were decreased. This land use
change also affected the decreasing of richness index in soil fauna and nematode, litter

and their nutrients and microbial activity. However, diversity of bacteria was increased
after the deforestation. From the calculation on soil physio-chemical quality index and

soil biodiversity quality index, the result observed a decline of soil fertility and

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biodiversity in the 3 rotations of the continuous rubber monoculture plantation. But,
there was no significantly different between the rubber age. However, some factors

showed that the soil ecosystem could recovery along the rubber age after
deforestation, but it seemed to decline again after the second logging and unable to

recover in the 3 rotation.
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