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13 September 2021 Effect of biochar applications on soil phosphorus availability under different soil moisture levels
Yuxin Li, Haixiao Li, Xueqiang Lu
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Soil moisture level is crucial to soil phosphorus (P) availability; however, there is no quantitative research on the relation between soil P availability and moisture level. In addition, biochar application could also alter soil P availability at different moisture levels. In this study, a 16 d soil incubation experiment was conducted at a laboratory scale to analyze the effects of soil moisture and P fertilization regimes (P-laden biochar fertilizer and conventional mineral P fertilizer) on soil P availability and fractionation. The results showed that soil P availability was positively correlated with soil moisture level (Pearson coefficients ranged from 0.46 to 0.91). High moisture level would lead to less amount of P in readily available fractions under P-laden biochar application. However, even with less P in readily available fractions, P-laden biochar could maintain soil P availability (117.7 mg P·m−2) at a similar level as the conventional P fertilizer (116.1 mg P·m−2).

Yuxin Li, Haixiao Li, and Xueqiang Lu "Effect of biochar applications on soil phosphorus availability under different soil moisture levels," Canadian Journal of Soil Science 102(1), 155-163, (13 September 2021).
Received: 3 September 2020; Accepted: 21 August 2021; Published: 13 September 2021

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anion exchange membrane
biocharbon enrichi de P
extraction séquentielle
fractionnement du P dans le sol
membrane échangeuse d’anions
P-laden biochar
sequential extraction
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