Human Influences on the Development of Acid Sulphate Soils in the Pearl River（the Zhujiang） DeltaEnglish Full Text

LIN CHUXIA(chool Of Geography, The University of New South Wales, Sydney, N. S. W. 2052 (Australia))

Abstract: In the Pearl River Delta with more than 1000 years of intensive land reclamation history, the developmentof acid sulphate soils has been generally limited in terms of their acid potential （pyrite content） and spatialextent. This is attributed to the rapid delta progradation, partially resulted from increasing sediment yieldcaused by deforestation within the catchment and the empolderment in the estuarine embayment. Theempolderment practice accompanied by the clearance of mangroves stopped the upward growth of the pyriticlayer on the one hand and limited the vertical accretion of non-pyritic freshwater sediments over the pyriticestuarine sedimellts on the other. In such a case, the Pyritic layer in the area is frequently thin and ofshallow occurrence. Under forced leaching-recharge conditions for the paddy rice cultivation, the leaching ofacid sulphate materials prevails over its production and this leads to a net loss in pyrite oxidation products.Land excaVation for fishpond farming accelerates Pyrite oxidation due to the direct exposure of the pyriticsediments to air on the pond bunds. Severe acidification can intensify the environmental degradation ofestuarine ecosystems.

Keywords：

acid sulphate soil; fishpond farming; human impact; pyrite; water management;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Agronomy
Classification Code：
S153.6

Mobile Reading

Read on your phone instantly

Step 1
Scan QR Codes

"Mobile CNKI-CNKI Express" App

Step 2
Open“CNKI Express”

and click the scan icon in the upper left corner of the homepage.

Step 3
Scan QR Codes

Read this article on your phone.
CAJ Download
PDF Download

Human Influences on the Development of Acid Sulphate Soils in the Pearl River（the Zhujiang） DeltaEnglish Full Text

LIN CHUXIA(chool Of Geography, The University of New South Wales, Sydney, N. S. W. 2052 (Australia))

Read on your phone instantly

Citation Network

Related Literature