花生根系、叶片及针果均具有吸磷功能，产量形成期各器官吸磷能力及磷在器官间的分配比例，不仅影响着产量的形成，而且对其它器官的衰老速率也有调控作用，这种调控作用反过来又影响着产量形成。我国一直面临着磷资源匮乏与磷肥利用率低的双重压力，提高磷利用效率意义重大。本项目以挖掘不同器官吸磷潜力及提高植株磷效率为目标，在前期研究磷对根系形态及生理特性影响的基础上，以磷代谢为主线，将不同磷源（来自根系、叶茎、针果）采取局部"分割"与整体"组合"相结合方法，在产量形成期对不同器官供磷，研究不同基因型品种磷的吸收特点、运转分配规律（包括贮藏磷和吸收磷）及其对产量形成和营养器官衰老的影响，阐明不同器官间磷的补偿效应、协同效应和相互抑制效应及其与其它生理代谢的关系，明确不同磷源供磷潜力及对产量贡献潜力，揭示不同落叶属性品种磷代谢差异机制，提出基于协同发挥根系、叶茎、针果磷吸收潜力及提高植株磷效率的技术途径。

Roots, leaf-stems, peg-pods of peanut all have the function to absorb the phosphorus (P). During yield forming period, the absorption capacity, allocation proportion of P among organs could affect yield formation, as well as organs senescence which in turn affect the formation of production. China has been facing the dual pressures from lack of P resource and low efficiency of P fertilizer. So it is crucial for improving P efficiency. Based on the previous study on the effect of P to root morphological and physiological characteristics, this study will be conducted along the mainline of P metabolism and the main aim of exploiting P absorbing potentialities of different organs and promoting plant P efficiency. In this study, the partial "split" and overall "portfolio" combining methods based on P sources (deriving from roots, leaves, stems, pegs and pods ) are used to: (1) investigate the P absorbing characteristics, P transportation and distribution rule (including storage P and absorption P), and their contribution to yield formation and impact on nutritive organ senescence under different levels of P application to peanut organs and two genotypes in yield forming period; (2) clarify the compensatory, synergistic and inhibiting effect among organs, and their relations with other physiological metabolism; (3) determine P supplying potential of different P sources and their contribution potential to yield; (4) reveal the P metabolism mechanism between genotypes with different leaf senescence characteristics; (5) point out technological approaches based on collaborative exerting the P uptake potential of roots, leaf-stems, peg-pods, and enhancing the plant P efficiency.