自压吸气增氧灌溉放水管的研制

Development of Drainage Pipe for Self-pressurized Inspiratory Oxygenated Irrigation

增氧灌溉是21世纪初提出并逐步发展起来的一项节水增效灌溉新技术,具有明显的节水减排、省肥增产效果,经济及社会生态效益显著。然而,现有增氧灌溉,一般采用机械增氧方式,须配套特制的灌溉水增氧设备并具备能源(动力)条件,目前在设施农业、大棚果蔬种植等旱作高效节水灌溉领域发展较快、应用较多。在广袤的野外大田水稻种植区域,受能源(动力)条件缺乏、增氧设备成本高昂等因素制约,尚未能应用增氧灌溉技术。鉴于此,研制了一种自压吸气增氧放水管,利用灌溉供水管道内水流自有压力实现灌溉水增氧,成功解决了野外无能源、动力条件下水稻增氧灌溉关键问题。经现场检测,自压吸气增氧放水管可使灌溉水含氧量提高14%左右,灌溉水高含氧量持续时间达20 h以上。

Oxygenated irrigation is a new irrigation technology which is proposed and gradually developed at the beginning of the 21st century.It has obvious effects on water saving and emission reduction,fertilizer saving and production increase,resulting in producing significant economic and social ecological benefits.However,the existing oxygenated irrigation technology generally adopts mechanical aerobic method,which requires special oxygenated equipment,energy and power equipment.Hence,it is mostly used in the field of dry land efficient water-saving irrigation,such as facility agriculture,greenhouse fruit and vegetable planting.Due to the limitation of equipment and application conditions,the oxygenated irrigation technology has not been applied in the rice planting area under field conditions.In this paper,a drainage pipe of self-pressurized inspiratory oxygenated irrigation is developed to solve the key problems of oxygenated irrigation for rice under the condition of no energy and power in the field by using the self-pressure of water flow in the irrigation water supply pipe of the low-pressure pipe irrigation area.According to the field test,the oxygen content in irrigation water could be increased by 14%and the duration of high oxygen content in irrigation water could be lasted more than 20 hours.