Authors: Fang Wang HongLang Xiao Songbing Zou
Publish Date: 2011/12/28
Volume: 67, Issue: 1, Pages: 265-272
Abstract
This research on an alluvial plain oasis in the middle reaches of the Heihe River used the trend estimation model of principal component analysis through fixed position experiments to investigate and analyze changes in saline meadow soil characteristics after reclamation of the oasis The conclusion is that after cultivation for a number of years clay content increased from 918 before cultivation to 1293 after 30 years of cultivation and soil nutrient content increased as well but available potassium decreased from 131550 mg/kg before cultivation to 24084 mg/kg after 30 years of cultivation As a result of engineering biological and agricultural methods total salt content significantly decreased by 9715 from 7028 g/kg before cultivation to 200 g/kg after 30 years of cultivation Through the trend estimation model of principal components analysis PCA it was found that soil quality improved over time Synthetic analysis of various indexes of soil quality revealed that meadow saline soil could be used for agricultural production with responsible tillage
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