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Corn straw biochar addition elevated phosphorus availability in a coastal salt-affected soil under the conditions of different halophyte litter input and moisture contents
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-11-11 , DOI: 10.1016/j.scitotenv.2023.168355 Xianxiang Luo 1 , Wenjie Chen 2 , Qiang Liu 2 , Xiao Wang 3 , Jing Miao 2 , Liuingqing Liu 2 , Hao Zheng 1 , Ruhai Liu 1 , Fengmin Li 1
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-11-11 , DOI: 10.1016/j.scitotenv.2023.168355 Xianxiang Luo 1 , Wenjie Chen 2 , Qiang Liu 2 , Xiao Wang 3 , Jing Miao 2 , Liuingqing Liu 2 , Hao Zheng 1 , Ruhai Liu 1 , Fengmin Li 1
Affiliation
Improving salt-affected soil health using different strategies is of great significance for Sustainable Development Goals. The effects of biochar as a sustainable carbon negative soil amendment on phosphorous (P) pools in the degraded salt-affected soils of the of coastal wetlands (as one of the primary blue carbon ecosystems) with halophyte litter input under different water conditions (the two intrinsic characteristics of coastal wetlands) are poorly understood. Thus, a corn straw derived biochar (CBC) was added into a coastal salt-affected soil collected from the Yellow River Delta to investigate its effect on P fractions and availability under the input of three different local halophyte litters (i.e., , and ) and under the unflooded and flooded water conditions. The results showed that the individual input of increased soil P availability by 28.2–40.9 %, but and had little effect on P availability. CBC individual amendment more efficiently enhanced P availability in the unflooded soil than the flooded soil. However, the co-amendment of CBC with litters showed little synergistic effect on P availability. CBC sharply increased the proportion of Ca-bound labile P fraction, but moderately lifted the proportion of Al/Fe-bound mediumly labile P fraction. CBC-enhanced P availability and altered inorganic P fractions were mainly resulted from the provision of labile inherent P by biochar, improved soil properties (i.e., increased CEC), and altered bacterial community composition (i.e., elevated abundance of P-solubilizing and phosphate-accumulating bacteria). These findings give new insights into understanding P biogeochemical cycling in the coastal salt-affected soils amended with biochars, and will be helpful to develop biochar-based technologies for enhancing P pools and improving soil health of the blue carbon ecosystems.
中文翻译:
在不同盐生植物凋落物输入和水分含量的条件下,添加玉米秸秆生物炭提高了沿海盐害土壤中磷的利用率
采用不同策略改善受盐影响的土壤健康对于可持续发展目标具有重要意义。生物炭作为可持续碳负土壤改良剂对不同水条件下盐生植物凋落物输入的沿海湿地(作为主要蓝碳生态系统之一)退化盐影响土壤中磷(P)库的影响(两种沿海湿地的内在特征)人们知之甚少。因此,将玉米秸秆衍生的生物炭(CBC)添加到从黄河三角洲收集的沿海受盐影响的土壤中,以研究其在三种不同的当地盐生植物凋落物(即, , 和 )输入下对磷组分和有效性的影响,以及在未淹水和淹水的情况下。结果表明,个体投入使土壤磷有效性提高了28.2%~40.9%,但对磷有效性影响不大。CBC 单独修正比淹水土壤更有效地提高了未淹土壤中磷的利用率。然而,CBC 与窝的共同修正对 P 利用率几乎没有显示出协同效应。CBC 大幅增加了 Ca 结合的不稳定 P 部分的比例,但适度提高了 Al/Fe 结合的中等不稳定 P 部分的比例。CBC 增强的磷有效性和改变的无机磷组分主要是由于生物炭提供不稳定的固有磷、改善土壤性质(即增加 CEC)和改变细菌群落组成(即增溶磷和磷酸盐的丰度)。积累细菌)。这些发现为了解用生物炭修正的沿海盐害土壤中的磷生物地球化学循环提供了新的见解,并将有助于开发基于生物炭的技术,以增强磷库和改善蓝碳生态系统的土壤健康。
更新日期:2023-11-11
中文翻译:
在不同盐生植物凋落物输入和水分含量的条件下,添加玉米秸秆生物炭提高了沿海盐害土壤中磷的利用率
采用不同策略改善受盐影响的土壤健康对于可持续发展目标具有重要意义。生物炭作为可持续碳负土壤改良剂对不同水条件下盐生植物凋落物输入的沿海湿地(作为主要蓝碳生态系统之一)退化盐影响土壤中磷(P)库的影响(两种沿海湿地的内在特征)人们知之甚少。因此,将玉米秸秆衍生的生物炭(CBC)添加到从黄河三角洲收集的沿海受盐影响的土壤中,以研究其在三种不同的当地盐生植物凋落物(即, , 和 )输入下对磷组分和有效性的影响,以及在未淹水和淹水的情况下。结果表明,个体投入使土壤磷有效性提高了28.2%~40.9%,但对磷有效性影响不大。CBC 单独修正比淹水土壤更有效地提高了未淹土壤中磷的利用率。然而,CBC 与窝的共同修正对 P 利用率几乎没有显示出协同效应。CBC 大幅增加了 Ca 结合的不稳定 P 部分的比例,但适度提高了 Al/Fe 结合的中等不稳定 P 部分的比例。CBC 增强的磷有效性和改变的无机磷组分主要是由于生物炭提供不稳定的固有磷、改善土壤性质(即增加 CEC)和改变细菌群落组成(即增溶磷和磷酸盐的丰度)。积累细菌)。这些发现为了解用生物炭修正的沿海盐害土壤中的磷生物地球化学循环提供了新的见解,并将有助于开发基于生物炭的技术,以增强磷库和改善蓝碳生态系统的土壤健康。