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| Citation: |
YIN Yamin, ZHAO Zuozhang, SONG Guocang, et al. Effects of Salt-isolating Materials on Water-salt Distribution and Evaporation Characteristic of Salinized Soil[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2024, 39(2): 155-161. DOI: 10.12101/j.issn.1004-390X(n).202312028
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To explore the regulation of soil water and salt transport of salt-insulating materials, providing a scientific basis for the rational selection of saline soil treatment measures, improvement of soil salinization and regional ecological restoration.
The soil of Jiaozishan Tunnel slag dump in Hejing Town, Lufeng City, Chuxiong Prefecture, Yunnan Province, was selected as the research object, and the three plant straws of Ageratina adenophora (F1), Agave sisalana Perr. ex Engelm. (X1) and wheat (D1), were used as soil salt-isolating materials, red clay without any salt-isolating materials were used as control group (CK) to carry out indoor soil column test, and the soil cumulative evaporation, soil profile moisture content and soil salt content were measured.
1) The cumulative evaporation of soil was CK>D1>F1>X1, which could reduce the soil water evaporation rate by 22.69%. 2) The average moisture content of soil profile layer in the 18-30 cm was F1>X1>D1>CK during the whole experiment; the average moisture content of 0-18 cm soil layer was F1>X1>D1>CK from the initial stage to the 27th day of the experiment, and presented as CK>D1>X1>F1 from the 28th day to the end of the experiment. 3) The average salt content of soil was CK>D1>X1>F1, the salt accumulation rate was reduced by 12% to 35%.
In the evaporation test, the salt-isolating materials has good effects on blocking water up-welling and slowing salt accumulation to the soil above the spacer, and it has the effect of water retention and inhibiting salt surface accumulation, and the effect of A. adenophora is the best.
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