College of Resources and Environment, Academy of Agricultural Sciences, Key Laboratory of Efficient Utilization of Soil and Fertilizer Resources, Southwest University, Chongqing, 400716, China.
Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, China.
Sci Rep. 2023 Apr 7;13(1):5677. doi: 10.1038/s41598-023-31908-x.
Using agricultural wastes as an alternative phosphorus (P) source has great prospects to improve soil P status. A 70-day incubation experiment was carried out to investigate the effects of superphosphate (SSP), poultry manure (PM), cattle manure (CM), maize straw (MS), and cattle bone meal (CB) with the same total P input on soil P availability and fractions in typical acidic (red soil) and alkaline (fluvo-aquic soil) soils. The results showed that in both fluvo-aquic and red soils, CM out-performed other P sources in improving soil P availability. Changes in soil Olsen-P (ΔOlsen-P) were greater in fluvo-aquic soils with SSP, PM and CM additions than in red soils. Among the different P sources used, only CM has increased the labile soil P fractions to levels similar to that with SSP. Compared with SSP, more monoester P and inositol hexakisphosphate were detected in soils amended with PM and CM. A structural equation model (SEM) analysis suggested that soil pH had a direct positive effect on the labile P fractions in the acidic red soil amended with different P sources. In summary, CM is a superior P source for increasing plant available soil P, with considerable practical implications for P recycling.
利用农业废弃物作为替代磷（P）源，具有改善土壤 P 状况的巨大前景。本研究开展了一项为期 70 天的培养实验，以调查过磷酸钙（SSP）、家禽粪便（PM）、牛粪（CM）、玉米秸秆（MS）和牛骨粉（CB）在相同总磷投入量下对典型酸性（红壤）和碱性（潮土）土壤中土壤 P 有效性和形态的影响。结果表明，在潮土和红壤中，CM 在提高土壤 P 有效性方面优于其他 P 源。添加 SSP、PM 和 CM 后，潮土中土壤Olsen-P（ΔOlsen-P）的变化大于红土。在所用的不同 P 源中，只有 CM 增加了土壤中易解磷分数，使其达到与 SSP 相似的水平。与 SSP 相比，在添加 PM 和 CM 的土壤中检测到更多的单酯 P 和肌醇六磷酸。结构方程模型（SEM）分析表明，土壤 pH 对添加不同 P 源的酸性红壤中易解磷分数有直接的积极影响。综上所述，CM 是一种增加植物有效土壤 P 的优良 P 源，对 P 循环具有重要的实际意义。
