微生物肥料对呼伦贝尔打孔羊草草甸草原土壤微生物及酶活性的影响研究

发布时间：2018-03-16 00:10

本文选题：羊草草甸草原　切入点：打孔　出处：《生态环境学报》2017年04期 　论文类型：期刊论文

【摘要】：以呼伦贝尔退化羊草(Leymus chinensis)草甸草原割草场为研究对象,研究在打孔羊草草甸草原施加不同微生物肥料处理下土壤养分、微生物量碳氮和酶活性的变化及影响土壤微生物量碳氮和酶活性的关键土壤因子,旨在为退化羊草草甸草原生态系统的改良、恢复及合理利用提供科学依据。结果表明,(1)水分正常年份,土壤中全碳和全氮含量最高值均出现在腐殖酸+微生物菌剂(F+J)处理,分别比对照(CK)提高1.84%~18.53%、1.24%~31.67%,其他不同处理土壤养分无显著差异。(2)土壤生物活性与土壤水热状况密切相关,在雨水正常的2014年,土壤微生物量碳、氮含量最高值分别出现在F+J和海藻酸+微生物菌剂(H+J)处理,分别比CK提高36.52%和28.56%;在降水较少、气候干燥的2015年,土壤微生物量碳、氮含量最高值分别出现在海藻酸(H)和糖蜜发酵(T),分别比CK提高9.86%和15.02%;(3)打孔+施微肥短期效应能够影响土壤蔗糖酶和过氧化氢酶,2014年土壤蔗糖酶表现为H+J和F+J显著高于其他处理,较CK分别提高了10.68%和10.12%,2015年不同打孔与施微生物肥料处理比CK提高4.72%~9.84%,且腐殖酸(F)、H、T以及F+J处理显著高于CK;2015年土壤过氧化氢酶表现为F和F+J显著高于CK,提高了2.50%。(4)土壤全碳,速效钾、速效氮,电导率分别为土壤蔗糖酶,脲酶,过氧化氢酶的关键影响因子,土壤全磷、速效磷为土壤微生物量的关键影响因子。综合分析表明,施入复合微生物肥料与微生物菌剂有助于提高呼伦贝尔打孔羊草草甸草原土壤微生物量碳氮含量和土壤酶活性,有利于改善草原土壤生物化学肥力状况。
[Abstract]:Soil nutrients of Leymus chinensis meadow meadow in Hulunbeir meadow were studied under different microbial fertilizer treatments in the meadow of Leymus chinensis. The changes of microbial biomass carbon nitrogen and enzyme activity and the key soil factors affecting soil microbial biomass carbon nitrogen and enzyme activity are aimed at improving the ecosystem of degraded Leymus chinensis meadow grassland. The results showed that the highest values of total carbon and total nitrogen in soil appeared in humic acid microbial agent F J) in the year of normal water content. The biological activity of soil was closely related to soil water and heat status. In 2014, soil microbial biomass carbon was normal in Rain Water, but there was no significant difference in soil nutrient in other treatments. The highest nitrogen content appeared in F J treatment and alginate microbial agent H J treatment, which were 36.52% and 28.56 higher than CK, respectively. On 2015, when precipitation was less and climate was dry, soil microbial biomass carbon was increased. The highest value of nitrogen content appeared in Alginate (H) and molasses ferment (TX), which were 9.86% and 15.02% higher than CK, respectively. The short-term effect of punching micro-fertilizer on soil sucrose enzyme and catalase could be affected. In 2014, soil sucrose enzyme was H J and F J respectively. Significantly higher than other treatments, In 2015, the treatments with different punching and applying microbial fertilizer increased 4.72% and 9.84%, respectively, and the humic acid FU HnT and F J treatments were significantly higher than CK, and in 2015 soil catalase showed that F and F J were significantly higher than CK and 2.50% higher than CK, respectively, and soil total carbon was increased by 2.50%. The key influencing factors of soil sucrase, urease and catalase were available potassium, available nitrogen and electrical conductivity. Soil total phosphorus and available phosphorus were the key influencing factors of soil microbial biomass. The application of compound microbial fertilizer and microbial fungicides can improve soil microbial biomass carbon and nitrogen content and soil enzyme activity in Hulunbeier meadow and improve soil biochemistry fertility.
【作者单位】：中国农业科学院农业资源与农业区划研究所//呼伦贝尔草原生态系统国家野外科学观测研究站;内蒙古农业大学草原与资源环境学院;呼伦贝尔学院生命科学与化学学院;
【基金】：公益性行业(农业)科研专项(201303060) 国家重点研发计划项目(2016YFC0500601) 中央级公益性科研院所基本科研业务费专项(1610132016033;1610132016027) 现代农业产业技术体系建设专项(CARS-35-11)
【分类号】：S812.2

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