Effects of phosphorus application and irrigation-water aeration on yield and zinc uptake and allocation in rice at maturation stage

【Objective】 Bioavailable phosphorus and oxygen are key factors affecting root activity and crop yield. The objective of this paper is to elucidate how phosphorus fertilization and irrigation-water aeration combined to affect root physiological traits, zinc absorption and allocation in rice and grain yield at maturation stage. 【Method】 The experiment was conducted in pots using the variety of Liangyou 608 as the model plant. It consisted of two irrigation treatments: aerating irrigation (OI) and conventional irrigation (NI), and four phosphorus fertilizations: 0.00 (P1), 1.35(P2), 2.7 (P3), 4.05g /pot (P4). In each treatment, we measured root activity, root acid phosphatase activity at different growth stages, as well as zinc allocation and grain yield at maturation stage. 【Result】 ① Phosphorus fertilization reduced zinc content in the iron-manganese films by 33.38% to 60.41%, while oxygenating irrigation water increased the transfer coefficient of zinc from root to straw by 24.98% to 113.15%. Aeration and pho