Soil Phosphorus Bioavailability and Recycling Increased with Stand Age in Chinese Fir Plantations

Biofertilizers as Strategies to Improve Photosynthetic Apparatus, Growth, and Drought Stress Tolerance in the Date Palm

“…Indeed, the beneficial effects of the inoculation by the rhizosphere microbial communities are linked with nutrient recycling, mineral nutrition. solubilisation of nutrients such as P, potassium (K) and iron (Fe), biodegradation of soil organic matter, phytohormone and antibiotics productions, improvements in soil structure and aggregation, and enhancement of plant resistance to pests and diseases (Al-Karaki, 2000, 2006Al-Karaki et al, 2004;Nadeem et al, 2014;Rillig et al, 2014;Grobelak et al, 2015;Kumar et al, 2015;Meddich et al, 2018Meddich et al, , 2019Symanczik et al, 2018;Raklami et al, 2019;Wu et al, 2019). The (co)inoculants of PGPR and/or AMF can advance the nutrient use efficiency of fertilizers (Adesemoye et al, 2009).…”

Alkaline Phosphomonoesterase-Harboring Microorganisms Mediate Soil Phosphorus Transformation With Stand Age in Chinese Pinus massoniana Plantations

“…The concentrations of the two P forms vary across soils hosting tree stands of different ages. For example, Pi in soils increased with stand development in Chinese Fir Plantations (Wu et al, 2019a). Po accounts for 30-70% of the total P in forest soils (Turner et al, 2007(Turner et al, , 2013Vitousek et al, 2010;Wu et al, 2019a), and it has to be mineralized to be available to plants through biological processes that are regulated by plants and soil microbes.…”

“…For example, Pi in soils increased with stand development in Chinese Fir Plantations (Wu et al, 2019a). Po accounts for 30-70% of the total P in forest soils (Turner et al, 2007(Turner et al, , 2013Vitousek et al, 2010;Wu et al, 2019a), and it has to be mineralized to be available to plants through biological processes that are regulated by plants and soil microbes. Deluca et al (2015) proposed a novel biological-based approach for evaluating P availability in complex ecosystems based on four P fractions (CaCl 2 -P, Citrate-P, HCl-P, and enzyme-P).…”

“…The P recycling and P acquisition strategies by plants and microorganisms suggests the change in P nutrition strategies depending on soil P availability. Therefore, soil P availability increases with an increase in stand age (Sharma et al, 2009;Gao et al, 2019;Wu et al, 2019a), which may lead to different dynamics in phoD-harboring microorganisms and ALP activity across different stand ages.…”

“…As demand for timber increased rapidly in the 1960s, large areas of Chinese P. massoniana plantations were established in the south of China, including our present sites (one of the major P. massoniana production areas). A chronosequence (space-for-time substitution) approach was also applied in the selection of sites in the present study, which had been adopted in numerous previous studies (Walker et al, 2010;Wu et al, 2019a). In this study, our aim was to explore how stand development influences soil P fractions and phoD-harboring microorganisms in both rainy and dry seasons in a chronosequence of P. massoniana plantations.…”