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增氧提高蔬菜磷素吸收利用的作用机制研究进展
王 瑞, 施卫明, 李奕林, 仲月明
中国科学院南京土壤研究所
摘要:
磷素的吸收利用率低是制约蔬菜生产的重要障碍因子之一,蔬菜根系形态和生理特性的适应性变化是高效利用土壤磷的主要生物学机制。当前磷肥的过量施用导致蔬菜根际环境的恶化,而根际环境对蔬菜的根系形态结构、根系活力和植株生理反应也都会产生反馈影响。本文从氧营养的角度,以根系为核心,综述了国内外提高蔬菜磷素利用率的途径,根系与根际环境互作对蔬菜磷素利用率的响应,并剖析了增氧促进根系生长及改善根际环境提高蔬菜对磷的吸收及利用的生物学机制,从而为提高蔬菜磷肥利用效率、减少蔬菜地磷肥投入量提供理论依据。
关键词:  蔬菜  增氧  磷肥  磷素利用率
DOI:10.13758/j.cnki.tr.2019.03.001
分类号:S158.3;Q945.12
基金项目:国家自然科学基金面上项目(31872957,31471948)和南京土壤研究所“一三五”计划和领域前沿项目(ISSASIP1608)资助。
Effect of Aeration on Improving Phosphorus Absorption and Utilization Efficiency by Vegetables
WANG Rui, SHI Weiming, LI Yilin, ZHONG Yueming
Institute of Soil Science,Chinese Academy of Science
Abstract:
Low use efficiency of phosphorus (P) is one of key limiting factors in vegetable production. The root morphological and physiological plasticity of vegetable is the main biological mechanism to improve efficient use of P in soil. Currently, the excessive application of phosphate fertilizer leads to the deterioration of vegetable rhizosphere. Furthermore, rhizosphere has a feedback effect on the root morphology and activity and plant physiology of vegetables in return. This review based on the root system, from the point of view of oxygen nutrition, summarized the study progresses at home and abroad on the strategies of improving P efficiency, the responses of root and rhizosphere interaction to the P utilization of vegetables. Meanwhile, the biological mechanism for the effects of oxygenation on root growth and rhizosphere to improve the absorption and utilization of P in vegetables was expounded. These advances would provide basis for improving P use efficiency and reducing the input of P fertilizer in vegetable production.
Key words:  Vegetable  Aeration  Phosphate fertilizer  Phosphorus use efficiency

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