Impact of oxygation on soil respiration and crop physiological characteristics in pineapple
Chen Xinming1,2, Jay Dhungel3, Surya Bhattarai3, Manouchehr Torabi3, David J Midmore3
(1.College of Water Resources Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China; 2.Key Laboratory for Agriculture Soil and Water Engineering in Arid Area, Ministry of Education, Yangling, Shaanxi 712100, China;3.Centre for Plant and Water Science, Central Queensland University, Rockhampton, QLD 4702, Australia）
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.
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