基于熵权物元模型的土壤养分评价:以新疆干旱区艾比湖流域人工绿洲为例

doi:10.11934/j.issn.1673-4831.2017.09.012

Abstract

Abstract:

A soil survey was carried out of the artificial oasis in the Ebinur Lake Basin, an arid zone of Xinjiang, and soil samples were collected by soil layer and by land use for analysis of soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP), total potassium (TK), readily available nitrogen (AN), readily available phosphorus (AP) and readily available potassium (AK), the seven major soil quality evaluation indices. An EWME model (entropy weight and matter element model) was established for grading by soil fertility the 59 soil samples collected from 15 sampling lots in the oasis. Results show that the soils in the oasis on the whole could be sorted into the category of "poverty" in soil fertility. TK and AK are two advantageous factors, while all the others are limiting. Agricultural fertilization should be done case-specifically and vary with type of land use and nutrient status of the soil. Farmland soil is the highest in nutrient content, and followed by forest soil, which is significantly associated with the degree of human disturbance.On the whole, the soil does not vary much in nutrient content from layer to layer. Under natural conditions, soil nutrient content in the deep layers is generally higher than that in the surface layer, while under cultivation, the trend is reversed. The findings of the evaluation are in consistence with the actual situation. Apparently, EWME model is very applicable to the evaluation of soil nutrient status of the artificial oasis.

Key words: EWME model, soil nutrient evaluation, land-use types, artificial oasis, the Ebinur Lake Basin, arid zone

CLC Number:

X825
S158.2

JIANG Ye-lin, WANG Rang-hui, PENG Qing, WU Xiao-quan, LIU Yan, LI Cheng. Soil Nutrients Evaluation Based on Entropy Weight and Matter Element (EWME) Model:A Case Study on Artificial Oasis in the Ebinur Lake Basin, an Arid Zone of Xinjiang.[J]. Journal of Ecology and Rural Environment, 2017, 33(9): 852-859.

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Soil Nutrients Evaluation Based on Entropy Weight and Matter Element (EWME) Model:A Case Study on Artificial Oasis in the Ebinur Lake Basin, an Arid Zone of Xinjiang.

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