国立研究開発法人 国際農林水産業研究センター | JIRCAS

Growth of Trees Planted for Rehabilitation of a Saline Area of the Wheatbelt in Western Australia

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

We clarified the relationship between environmental factors and the growth of seven Eucalyptus species and Casuarina obesa planted at an afforestation site in southern Western Australia's wheatbelt. The site consisted of abandoned fields damaged by secondary salinity associated with waterlogging. Afforestation is expected to progressively rehabilitate the land, which has a slight slope generating a large environmental gradient. During the rainy season, waterlogging (soil becoming saturated with water) occurred at the lower part of the site, but not at the higher part. The level of salt in the soil (EC1:5) increased gradually from higher to lower ground (0.34?2.7 dS m-1). Tree size and growth rate were negatively related to waterlogging intensity and showed small values at the lower part of the site, with only a slight effect on tree size and growth rate. Moreover, interspecific differences in size and growth rate were observed. Eucalyptus sargentii and E. occidentalis had larger sizes and faster growth rates than E. camaldulensis. Trees planted under waterlogging conditions at the lower part of the site are likely to fail due to poor growth; therefore, afforestation should begin on higher ground where trees would experience normal growth, and in doing so, reduce the soil water content to rehabilitate the land. Improvement of water balance through afforestation would confirm the benefits of appropriate agroforestry management.

刊行年月2010-01-01
作成者KAWARASAKI Satoko H.HAMANO HiroyukiAIKAWA Shin-ichiUTSUGI HajimeSAITO MasahiroTANOUCHI HiroyukiKOJIMA ToshinoriYAMADA Koichi
著者キーワード

abandoned field

agroforestry

waterlogging

公開者Japan International Research Center for Agricultural Sciences
データ作成日2010-01-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
44
1
開始ページ37
終了ページ43
DOI10.6090/jarq.44.37
権利Japan International Research Center for Agricultural Sciences
言語eng