Interaction of phosphorus supply and water deficits on the yield, protein and oil content, and nitrogen fixation of soybean (Glycine max (L.) Merr.)

Research output: Chapter in Book/Conference paperChapterpeer-review

Abstract

Soybean is an important source of protein and oil in the developed and developing world. Water and phosphorus (P) deficits frequently limit soybean yield. P is a finite resource that needs to be used efficiently while climate change is reducing the availability of adequate rainfall for rainfed crop production and irrigation of soybean. This review focuses on the effects of water deficits and P deficits on root traits, nitrogen (N) fixation, and N and P uptake from soil on biomass accumulation, yield and yield components, seed quality, including protein and oil content, of a range of soybean genotypes. The potential root and shoot traits that improve adaptation to water deficits, P deficits, water-use efficiency and P-use efficiency are reviewed. As soybean frequently undergoes the combination of water- and low-P stress, we review the interaction between P deficits and water deficits on root and shoot traits, N fixation and the yield of soybean. We provide a potential mechanistic understanding of the alleviation of yield loss from water deficits by the supply of P. The results indicate that P supply increases the water and nutrient uptake under water stress by increasing the root and nodule growth during pod and seed development, increasing the shoot biomass by increasing leaf area and the capacity for carbon assimilation, that are the main mechanisms by which P application alleviates the yield loss under water-limited conditions. Future directions for research conclude the review.

Original languageEnglish
Title of host publicationAdvances in Agronomy
EditorsDonald L. Sparks
PublisherAcademic Press
DOIs
Publication statusAccepted/In press - 2024

Publication series

NameAdvances in Agronomy
ISSN (Print)0065-2113

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