施加秸秆与废弃物对茉莉园土壤团聚体及碳氮磷含量的影响

发布时间：2018-04-03 12:31

本文选题：秸秆　切入点：废弃物　出处：《水土保持学报》2017年04期

【摘要】：为了研究施加秸秆与废弃物对茉莉园土壤团聚体与碳、氮和磷含量的影响,以福州河滨茉莉园土壤为研究对象,对对照(C)、秸秆(S)、秸秆+石膏(SG)、秸秆+生物炭(SB)和秸秆+炉渣(SS)5种处理样地0—10,10—20,20—30cm土层土壤团聚体分布和稳定性,包括0.25mm团聚体含量(DR0.25)、平均质量直径(MWD)、几何平均直径(GMD)、分形维数(D)以及土壤碳、氮、磷含量和化学计量比进行了测定分析。结果表明:5种处理团聚体均以0.053~0.25,0.25~2 mm粒级为主。与对照相比,单施秸秆团聚体DR0.25、MWD和GMD值分别减小了19.86%,19.18%和37.98%,D增加了14.26%,团聚体稳定性降低;秸秆+石膏、秸秆+生物炭和秸秆+炉渣与单施秸秆相比,DR0.25和MWD相差不大,GMD较单施秸秆分别增加了2.34%,0.63%和12.67%,D分别减少了2.31%,6.26%和5.01%,团聚体稳定性增强。秸秆、秸秆+石膏、秸秆+生物炭和秸秆+炉渣与对照相比,0—10cm表层土壤碳、氮、磷含量均显著增加,10—20,20—30cm土层变化不大,表现为养分向表层富集的现象。综合比较分析,石膏、生物炭和炉渣可以作为秸秆还田配施改良剂,以提高秸秆还田的功效。
[Abstract]:In order to study the effects of straw and waste on the contents of soil aggregate, carbon, nitrogen and phosphorus in jasmine orchard, the soil of Fuzhou Riverside Jasmine Orchard was studied.The distribution and stability of soil aggregates in 0-10 ~ (-10 ~ (-20)) ~ (20) ~ (20) ~ (30) cm soil layer were studied in 5 kinds of treatments, I. e., C ~ (10), S ~ (2 +), S ~ (2 +), Gypsum, SBB) and SS ~ (2 +).The contents of 0.25mm aggregates and soil carbon, nitrogen, phosphorus and stoichiometric ratios were determined and analyzed, including the contents of 0.25mm aggregates, mean mass diameters, geometric mean diameters, fractal dimensions, and soil carbon, nitrogen, phosphorus contents and stoichiometric ratios.The results showed that 0. 053 0. 25 and 0. 25 ~ 2 mm grain size was the main size of 5 kinds of treated aggregates.Compared with the control, the values of DR0.25 MWD and GMD decreased 19.86% and 37.98%, respectively, increased 14.26%, decreased the stability of the aggregates, and reduced the stover gypsum.Compared with single straw application, straw biomass and straw slag had little difference in DR0.25 and MWD. Compared with single application of straw, GMD increased 2.34% 0.63% and 12.67%, respectively, and decreased 2.31% 6.26% and 5.01%, respectively, and the stability of aggregates was enhanced.Compared with control, straw, straw gypsum, straw biochar and straw slag increased significantly the contents of carbon, nitrogen and phosphorus in 10 ~ 20 ~ 20 ~ 30 cm soil layer, showing the phenomenon of nutrient enrichment to the surface layer.Comprehensive comparison and analysis, gypsum, biochar and slag can be used as straw in the field with the application of improver, in order to improve the efficacy of straw returning to the field.
【作者单位】：福建师范大学地理研究所;闽榕茶业有限公司;福建师范大学湿润亚热带生态地理过程教育部重点实验室;
【基金】：国家自然科学基金项目(41571287) 福州市科技计划项目(2014-G-66,2016-N-86) 福建师范大学地理科学学院研究生科研创新基金项目(GY201610)
【分类号】：S152.4;S153.6

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