Improving Phosphorus Fertility in Soil through Microbial Mediators

Abstract

<jats:p>Microbes are an important element of the phosphorus cycle operative in the soil and play significant roles in transference of phosphorus between various soil phosphorus pools. Therefore, there has been continued interest in the usage of soil microbes to improve the phosphorus nutrition of plants and increase the overall efficiency of phosphorus use in agricultural systems. This interest originates from the fact that insufficiency of phosphorus is a common problem in soils all over the world, that a foremost cost for agricultural production is due to phosphate fertilizers and that the efficacy of phosphorus used by plants from soil applied phosphate fertilizers is very poor. Hence, with such issues the role of soil microbes in increasing phosphorus fertility in soils becomes more important. In this review several such aspects concerning the solubilisation and mobilization of soil phosphorus by microorganisms for enhancing soil fertility are discussed.</jats:p>

Hydropriming and Biopriming Improve Medicago truncatula Seed Germination and Upregulate DNA Repair and Antioxidant Genes

“…Considering the priming techniques used in this study, hydropriming was chosen mainly because it is very easy to implement, and hence highly accessible also to farmers from underdeveloped regions. The biopriming formulations were selected from local varieties of rhizospheric microorganisms having plant growth-promoting traits under stressful conditions and studied in relation to improved phosphorus nutrition [48,49]. Moreover, biopriming can be associated with the elicitation of plant immunity, starting from the seedling stage [50].…”

“…On the other hand, biopriming had a more positive effect during seedling growth, as evidenced by the observed enhanced biomass (Figure 3). The biopriming treatments affect the germination process at later stages, for instance when the radicle protrudes and it becomes directly exposed to bacteria that can aid in soil nutrient uptake [17,49].…”

The Impact of Biofertilizers and NPK Fertilizers Application on Soil Phosphorus Availability and Yield of Upland Rice in Tropic Dry Land

“…The increase in productivity that occurs is due to biological activity in the soil, where PSM releases phosphatase enzymes and organic acids that cause P to become available to plants [7,8]. The application of PSM increased the soil phosphorus availability [9].…”