Abstract: The field experiments were conducted to determine the influences of high-frequency drip irrigation mulched with plastic film on soil temperature and moisture and yields of cotton (Gossypium hirsutum L.). The results indicated that the high-frequency treatment irrigated 20 times more than the control treatments, and with more than 596.2mm irrigation water. The high-frequency treatment resulted in a higher soil moisture,lower water uptake resistance for cotton roots and a greater water consumption intensity up to 7.4㎜ per day. The soil temperature under the high-frequency drip irrigation during the growing stages was lower, and cotton roots distributed mainly in the upper soil. The high-frequency irrigation also led to the over vegetative growth, LAI being higher up to 6.6. However, the yield of cotton with the high-frequency drip irrigation was 111.45 kg/ha lower than that of the CK. Therefore, it was concluded that the high-frequency drip irrigation mulched with plastic film was of no significance in term of water saving in the practice.

Key words: High-frequency drip irrigation, High-frequency drip irrigation, Field microclimate, Soil moisture, Soil temperature, Cotton (Gossypium hirsutum L.)