%0 Journal Article %A SHEN Pu %A LUO Sheng %A WU Zhengfeng %A SUN Xiushan %A WANG Caibin %A YU Tianyi %A ZHENG Yongmei %A SUN Xuewu %A ZHENG Yaping %T Response of P Absorption-allocation Rate and Root Morphology of Peanut to P Foliar Fertilizers With Different Acidities %D 2015 %R 10.11869/j.issn.100-8551.2015.12.2418 %J Journal of Nuclear Agricultural Sciences %P 2418-2424 %V 29 %N 12 %X Effects of foliar fertilizers with different acidities phosphorus (P) forms on P absorptions and root morphologies of peanut (Arachis hypogaea L.) were investigated in the present study. P foliar fertilization experiment was conducted under artificial climate chamber in the study. The P foliar fertilizers with pH 5, pH 7 and pH 9 were sprayed to study the changes in P absorption-allocation and root morphological characteristics on seedling stage of peanut. Results showed that P foliar fertilizer under pH 7 increased significantly the P concentrations in leaf and stem by 46.9% and 25.7%, respectively. The P concentrations in leaf and stem were also promoted under pH 9, but it was lower than pH 7. P foliar fertilizers with different pH changed P absorption-allocation rates in root-stem-leaf systems. High pH (7 or 9) significantly decreased the P absorption amount and rats in roots, whereas it promoted the P absorption amount and rate in stem and leaf of peanut. P foliar fertilizer with high pH restricted the growth of root (especially the root length and surface area under root diameter<1.0 mm, and volume under root diameter>0.5 mm), while root length, surface area and volume were decreased by 172.6 to316.0cm, 72.8 to 96.6 cm2 and 3.1 to 3.5 cm3 per pot under pH 7 and pH 9 compared with pH 5. Therefore, spraying the neutral or alkaline P foliar fertilizer improved the P absorptions by aboveground parts of peanut seedling, while restricted the growths of root systems and decreased the needs of P by changing the root morphology. This study will provide a scientific basis for the high-efficiency use of P nutrient resources and rational fertilization for peanut. %U https://www.hnxb.org.cn/EN/10.11869/j.issn.100-8551.2015.12.2418