中文摘要：

在棉花大田实地测量的基础上，对地下滴灌条件下棉花不同生育期内土壤含水量进行分析，同时对实际应用效果进行监测，结果表明：地下滴灌影响土壤水分变化深度主要为20-60cm，棉花根系主要集中在15～50cm。通过对棉花常规地面沟灌、膜下滴灌和地下滴灌土壤水分变化试验研究分析和应用效果监测，棉花地下滴灌节水增产效果显著。

英文摘要：

Basing the practise measure data in cotton field, the changing of soil moisture in different growing period of cotton under subsurface drip irrigation was analyzed, and the application effect of subsurface drip irrigation was surveyed. The results show that the cotton root mostly concentrated in 15~50 cm, and the soil moisture changing depth of cotton field is mainly in 20~ 60 cm under subsurface drip irrigation. Compared with routine furrow irrigation and drip irrigation under plastic film, subsurface drip irrigation saves water and increases production obviously.