| Dynamic changes of soil water and salt in cotton field under mulched drip irrigation condition |
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| DOI：10.7606/j.issn.1000-7601.2013.04.009 |
| Key Words: cotton mulched drip irrigation water salt |
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| Abstract: |
| The dynamic changes of soil water and salt content and their interaction relationship were analyzed throughout the whole growing period of cotton under mulched drip irrigation in the fields with moderate and mild salinity. The results showed that the soil water content in the field with moderate salinity was higher than that in the field with mild salinity during the whole growth period of cotton. The change trend of soil moisture content was similar to that of soil salt content, being declined in the early growth stage, stable in the medium stage and increased slightly in the late stage. Dripping process significantly reduced the salt content in 0～40 cm soil layer, but the 40～80 cm soil layer was the salt gathering zone. The power and linear functions were suitable for imulating the salt in 0～40 cm, 0～60 cm, 0～80 cm and 40～80 cm soil layers by using the salt content in 0～20 cm soil layer, in which the R2 was extremely significant for 0～40 cm and 0～60 cm profiles and significant for 0～80 cm profile, but it was not significant for 40～80 cm profile. |
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