摘要
Moistube irrigation is a newly-developed irrigation technique that utilizes a semipermeable membrane to release water slowly and continuously into the plant root zone.Alternate Moistube Irrigation(AMI)is a combination of alternative irrigation and moistube irrigation.In order to investigate the effects of AMI on plant growth,greenhouse experiments were conducted on spinach(Spinacia oleracea)and water spinach(Ipomoea aquatica)plants at different time.We measured soil water content at a depth of 20 cm in the planting boxes,and also determined seed emergence rate,plant height,largest leaf area,fresh weight per plant,yield,and irrigation water productivity(IWP)for both spinach and water spinach.The results showed that the AMI treatments had significantly higher soil water content than the conventional surface irrigation control(CK).The emergence rates of spinach and water spinach were significantly higher in the AMI treatments than in the CK,and the plant height,largest leaf area,and fresh weight during the middle and late stages of spinach and water spinach growth were also significantly higher than those of the CK.Both spinach and water spinach grew well and produced high yield with high IWP under AMI with a high water head pressure of 1.5 m at tube spacing of 20 or 30 cm.We found that AMI with a suitable combination of head pressure and tube spacing can promote plant growth and increase yield and IWP under controlled conditions.
基金
Supported by Key Research and Development Program of Shanxi Province(202302140601009).
