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. 2023 Jan 4;13:1067498. doi: 10.3389/fpls.2022.1067498

Table 6.

Studies that report effects of P deficiency on total root length and/or root length density (TRL-RLD) and root biomass (RBIO) at field scale.

Reference Crop Soil Factors TRL-RLD RBIO
(Ho et al., 2005) common beans GEN IRR DECREASE
(Miguel et al., 2015) common beans loamy GEN DECREASE
(Ochoa et al., 2006) common beans GEN DECREASE DECREASE
(Deng et al., 2014) maize silty loam LEV DECREASE DECREASE
(Sheng et al., 2012) maize clay loamy LEV DECREASE DECREASE
(Zhang et al., 2012) maize loamy and silt DEV DECREASE DECREASE
(Duan et al., 2020) oilseed rape Alfisol DEV GEN DECREASE DECREASE
(Ao et al., 2010) soybean Acidic red soil GEN DECREASE
(Hadir et al., 2021) sugar beet silty loam DEV DECREASE DECREASE
(Teng et al., 2013) wheat silty LEV YEAR DECREASE DECREASE
(Henry et al., 2010b) common beans GEN IRR VARIABLE
(Henry et al., 2010a) common beans GEN VARIABLE
(Miguel et al., 2013) common beans loamy GEN VARIABLE
(Strock et al., 2018) common beans silty loam GEN VARIABLE
(Li et al., 2017) maize clay loamy LEV VARIABLE DECREASE
(Otani and Ae, 1996) others CROP VARIABLE
(Jing et al., 2004) soybean Acidic red soil GEN VARIABLE
(Steingrobe et al., 2001) winter barley loamy DEV VARIABLE
(Gutierrez-Boem and Thomas, 1998) soybean silty IRR LEV INCREASE  

DECREASE (in red): diminished TRL-RLD/RBIO, VARIABLE (in yellow): diverse, inconclusive or no effects on TRL-RLD/RBIO, and INCREASE (in green):a large TRL-RLD/RBIO in case of deficient as compared to non-deficient conditions. Factors refer to the variables studied in each manuscript. LEV: several levels of N applied, DEV: several development stages investigated, YEAR: several years investigated, IRR: water treatments applied (such as irrigation and drought), PLAN: several planting methods tested, SOIL: several soil types tested, GEN: diverse genotype tested, SITE: different sites tested, TILL: several tillage practices tested, CROP: several crops tested. For more details refer to SI Table 2 .