加氧灌溉对菠萝根区土壤呼吸和生理特性的影响

通过大田试验,研究了加氧灌溉对菠萝根区土壤呼吸作用、生理特性、生物量积累、果实产量、品质和水分利用效率的影响.采用Mazeei（空气注射器）给地下灌溉系统加入空气,设计了加氧和不加氧灌溉2种处理方式,7次重复.设计滴头埋深10 cm.研究表明,与对照相比,菠萝根区30 cm以内土壤水分质量分数和CO2质量分数没有明显差异,但是加氧灌溉使得土壤呼吸增加了100%;菠萝的果实鲜重、生物量鲜重、干物质重和收获指数明显增大,差异有统计学意义（p≤0.05）;加氧灌溉提高了菠萝的水分生产率,与对照相比增加了17.2%;同时,加氧灌溉明显改善了菠萝单果尺寸和重量,使得单果重量增加了17.3%,田间产量增加了4.3%,增加了果实的糖质量分数,减少了果实的透明物.研究结果为加氧灌溉技术的推广应用提供了理论依据.

Impact of oxygation on soil respiration and crop physiological characteristics in pineapple

Oxygation refers to irrigation of the crops with aerated water,air injection using the venture principle or the supply hydrogen peroxide in the root zone,by using subsurface drip irrigation（SDI） system.This research investigated the potential of oxygation to enhance soil respiration,plant growth,yield,and water use efficiency（WUE） of pineapple in field experiments.The field experiment,compared Mazzei air injectors and control and treatments（oxygation or not）,were randomized and replicated seven times in pineapple.In the experiments,soil water content and CO2 concentration in root zone of pineapple did not differ significantly between oxygation and not.But soil respiration increased by 100%,for oxygation compared to control at the same depth.There were significant effects of oxygation on pineapple fresh biomass,dry matter and industry production,and the harvest index.The irrigation water use efficiency（WUE） was not significantly improved,the WUE values in oxygation treatments were somewhat greater 4.3% compared with the control.However,the yield and some quality parameters were significantly improved,the total fruit yield and marketable yield increased by 17.3% and 4.3%.Our data suggest that the benefits of oxygation are application for field crop.