Liu et al 2021 and Luo et al 2020 relied on statistical models overestimate the OPDs showing an average OPD of 109 ×104 plants ha−1 and 94 ×104 plants ha−1 respectively按照nature food格式润色上面的句子

Liu et al. (2021) and Luo et al. (2020) used statistical models to overestimate the plant density, with an average plant density of 10.9 × 104 plants ha−1 and 9.4 × 104 plants ha−1, respectively.