Influence of transplantation time on cotton growth and yield under subsurface drip irrigation

Based on six measured hole to experiment, to study the influence of different transplantation time on cotton growth and yield under subsurface drip irrigation, in order to determine suitable transplantation time, during the transplantation time the suitable daily average temperature is 18.4~20°C, daily highest temperature is 26.2~27.2°C, apart from the ground 10 cm the daily average geotemperature is 20.92~22.22°C, daily highest geotemperature is 27.5~28.1°C; apart from the ground 15 cm the daily average geotemperature is 20.26~21.41°C, daily highest geotemperature is 24.6~25.1°C; after transplanting ten days the lowest daily temperature effective effective accumulated temperature is 66.46~70.65°C, the highest daily temperature effective effective accumulated temperature is 78.08~83.28°C, the daily geotemperature effective accumulated temperature is 104.72~106.71 apart from the ground 10cm, which offers reference for the development of subsurface drip irrtigation.