Respective impact of land use change and tree ageing on the soil biotic and abiotic compartments in a rubber chronosequence in Thailand

Name: Monrawee Peerawat

LCSH: Kasetsart University -- Dissertations. Ph.D. (Soil Science) 2020

Classification :.LCCS: S597.H48

LCSH: Kasetsart University. -- Department of Soil Science -- Dissertations

LCSH: Hevea -- soils

LCSH: Rubber plantations -- Thailand

LCSH: Soil fertility

LCSH: Soil biology

LCSH: Soil chronosequences

Abstract: The rapid expansion of perennial crops is a major threat to biodiversity in Southeast Asia. Recent studies have well documented the biodiversity losses related to the conversion of forest lands to oil palm or rubber plantations. On the opposite, the impact on soil biodiversity of the conversion of intensively managed annual crops to perennial crops has not yet been addressed. This study aims at assessing the impact on soil biodiversity of the conversion of cassava crop lands to rubber plantation with a specific focus on short term effects directly linked to the land use change and on the long-term effects related to the transformation of the ecosystems with the ageing of the plantation. Soil biodiversity (bacterial, fungal and macrofauna), microbial activities and pedoclimatic characteristics were measured over a chronosequence of 1 to 25 years old rubber plantation compared to cassava fields (the former crops) in Thailand. The conversion from cassava to young rubber plantation had no significant effects on soil macrofaunal and bacterial diversity while microbial biomass and substrate-induced respiration were significantly lower in young rubber plantation. This decrease could be originated from the cultivation in the inter-row of the young rubber plantation of other crops such as pineapple. Soil fauna structure and diversity together with microbial activities changed significantly after the canopy closure of the rubber plantation. Old rubber plantations harbored the highest microbial and macrofaunal biomass characterised by the dominance of earthworms, Firmicutes, and Trichoderma. Soil bacterial richness decreased significantly in old rubber plantation. The organic carbon content, CO2 emission, floor litter, and root biomass were highest under old rubber plantation and showed a strong correlation with soil moisture and the abundance of soil engineers. The change in pedoclimatic conditions across the rubber chronosequence was a more important driver of soil biodiversity and activities change than land conversion. Converting cassava crops to rubber plantationsfavored a higher overall soil biota abundance, microbial activities and organic matter content which can be assimilated to an efficient soil biological restoration from 7 years up to 25 years long term rubber plantation.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Kannika Sajjaphan

Role: Thesis Advisor

Name: Philippe Thaler

Role: Thesis CO-Advisor

Name: Alain Brauman

Role: Thesis CO-Advisor

Created: 2020

Modified: 2025-06-30

Issued: 2025-06-30

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2563/monrawee-pee-all.pdf

CallNumber: S597.H48 .M66

eng

Spatial: Thailand

DegreeName: Doctor of Philosophy

Level: Doctoral Degraee

Descipline: Soil Science

Grantor: Kasetsart University

©copyrights Kasetsart University

ลำดับที่.	ชื่อแฟ้มข้อมูล	ขนาดแฟ้มข้อมูล	จำนวนเข้าถึง	วัน-เวลาเข้าถึงล่าสุด
1	monrawee-pee-all.pdf	3.16 MB

ใช้เวลา

0.034309 วินาที