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Substituting Manure with Rice Husk to Improve Phosphorus Adsorption and Immobilization in High Phosphorus Accumulated Greenhouse Vegetable Soil

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Abstract

Substituting manure with rice husk is an effective measure to increase crop yield in high P accumulation greenhouse vegetable soil. However, the effect of rice husk addition on soil phosphorus (P) retention capacity and transformation is less known. In a 5-year greenhouse vegetable field experiment, four treatments, i.e., control (CK), chicken manure (CM), rice husk (RH), and chicken manure mixed with rice husk (CR), were designed to investigate the effects of substituting manure with rice husk on soil P fraction and adsorption. Compared with CK treatment, the tomato yield in RH and CR treatments was increased by 14.3% and 16.4%, respectively. Soil P surplus, Olsen-P, and zero equilibrium P concentrations were also increased with organic material addition, which was highest in CM treatment and lowest in RH treatment. Moreover, compared with control, the maximum P sorption and P-sorption coefficient in CM treatment were decreased by 24.1% and 81.8%, respectively. The proportion of labile P and inositol hexakisphosphate in CM treatment was increased, while the content of CaCO3 and Al extracted by Mehlich-3 solution was decreased. This suggested the adsorption capacity of P was low, which increased the risk of P downward migration in the soil profile in CM treatment. Meanwhile, the increased soil organic matter content in rice husk addition treatments could improve P immobilization by enhancing microbial P content and soil P adsorption. Substituting manure with rice husk could reduce P surplus and increase soil P retention. It is an effective means to solve the problem of unsustainable P application caused by organic amendments in high P vegetable soil.

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Funding

This study was funded by the National Key Research and Development Plan of China—Phosphorus (2017YFD0200208/2017YFD0200208-3), the Natural Science Fund of Shandong Province (ZR2020MC154), the Key Research and Development Plan of Shandong (2019GNC106015), and the Foundation of High-level Talents of Qingdao Agricultural University (663/1115036).

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Correspondence to Xiaodong Ding.

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Fei, C., Zhang, S., Li, J. et al. Substituting Manure with Rice Husk to Improve Phosphorus Adsorption and Immobilization in High Phosphorus Accumulated Greenhouse Vegetable Soil. J Soil Sci Plant Nutr 22, 1665–1675 (2022). https://doi.org/10.1007/s42729-022-00761-8

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  • DOI: https://doi.org/10.1007/s42729-022-00761-8

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