施用稻壳炭对黄棕壤氮磷淋失及微生物生物量碳氮含量的影响

发布时间：2018-05-21 02:23

本文选题：稻壳炭 + 黄棕壤　；参考：《南京林业大学学报(自然科学版)》2017年03期

【摘要】：【目的】为减少农田氮磷淋失,提高土壤肥力,探究高孔隙度的稻壳炭在增强黄棕壤对养分元素吸附的特征。【方法】采用室内土柱淋溶试验,研究不同稻壳炭施用量(质量占比分别为0、1%、4%、8%、12%)条件下,黄棕壤总氮(TN)、硝态氮(NO_3~--N)、铵态氮(NH_4~+-N)、总磷(TP)、磷酸根(PO_4~(3-))及可溶性有机碳(DOC)的淋失变化,并对黄棕壤氮磷养分和土壤微生物生物量的变化进行分析。【结果】随着施用量的增加,稻壳炭对黄棕壤TN、NO_3~--N、NH_4~+-N、DOC淋失的抑制效应增强,最佳施用量为12%时,TN、NO_3~--N、NH_4~+-N及DOC的淋失量与对照相比分别减少了85.41%、85.16%、92.61%、32.02%;随其施用量的增加,稻壳炭对黄棕壤中P淋失的抑制效应不显著,TP和PO_4~(3-)的淋失量反而增加,TN、NO_3~--N、有效磷(AP)及土壤微生物生物量碳氮(SMBC、SMBN)含量增高,而NH_4~+-N含量减少。【结论】稻壳炭可以有效抑制黄棕壤氮素及DOC的淋失,对磷素的淋失抑制效果不显著。
[Abstract]:[objective] in order to reduce nitrogen and phosphorus leaching from farmland and improve soil fertility, the characteristics of rice husk charcoal with high porosity in enhancing the adsorption of nutrient elements on yellow brown soil were investigated. [methods] soil column leaching experiments were carried out in laboratory. The leaching loss changes of total nitrogen (TNN), nitrate nitrogen (NO3C), ammonium nitrogen (NH4 ~ -NN), total phosphorus (TPN), phosphate PO44-3-Phosphate (PO43-3) and soluble organic carbon (DOC) in yellow brown soil were studied under different application rates of rice husk carbon. The changes of nitrogen and phosphorus nutrients and soil microbial biomass in yellow brown soil were analyzed. [results] with the increase of application rate, the inhibitory effect of rice husk charcoal on the leaching of TNNO3 + -N ~ -N DOC in yellow brown soil was enhanced. The amount of NH _ 4 ~ -N and DOC leached was 85.41% lower than that of the control, respectively, and 92.61% 32.02% of the total amount was increased with the increase of the amount of application, "the best amount of application was 12: 10%, and the amount of NH _ 4 ~ -N and DOC decreased by 85.41%, respectively, as compared with the control group, the amount of NH _ 4 ~ -N and DOC decreased respectively." The inhibitory effect of rice husk charcoal on P leaching in yellow brown soil was not significant. The leaching amount of TP and PO4 + 3) increased the contents of TNNO3- N, available phosphorus APN and soil microbial biomass SMBC- SMBN in yellow brown soil. The content of NH4- N decreased. [conclusion] Rice husk charcoal can effectively inhibit the leaching of nitrogen and DOC in yellow brown soil, but has no significant effect on phosphorus leaching.
【作者单位】：南方现代林业协同创新中心南京林业大学生物与环境学院;
【基金】：国家林业局“948”项目(2014-4-24) 国家重点研发计划(2016YFC0502605) 江苏高校优势学科建设工程资助项目(PAPD)
【分类号】：S141

【相似文献】