本文選題：羊草草甸草原　切入點：打孔　出處：《生態(tài)環(huán)境學(xué)報》2017年04期 　論文類型：期刊論文

【摘要】：以呼倫貝爾退化羊草(Leymus chinensis)草甸草原割草場為研究對象,研究在打孔羊草草甸草原施加不同微生物肥料處理下土壤養(yǎng)分、微生物量碳氮和酶活性的變化及影響土壤微生物量碳氮和酶活性的關(guān)鍵土壤因子,旨在為退化羊草草甸草原生態(tài)系統(tǒng)的改良、恢復(fù)及合理利用提供科學(xué)依據(jù)。結(jié)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現(xiàn)在腐殖酸+微生物菌劑(F+J)處理,分別比對照(CK)提高1.84%~18.53%、1.24%~31.67%,其他不同處理土壤養(yǎng)分無顯著差異。(2)土壤生物活性與土壤水熱狀況密切相關(guān),在雨水正常的2014年,土壤微生物量碳、氮含量最高值分別出現(xiàn)在F+J和海藻酸+微生物菌劑(H+J)處理,分別比CK提高36.52%和28.56%;在降水較少、氣候干燥的2015年,土壤微生物量碳、氮含量最高值分別出現(xiàn)在海藻酸(H)和糖蜜發(fā)酵(T),分別比CK提高9.86%和15.02%;(3)打孔+施微肥短期效應(yīng)能夠影響土壤蔗糖酶和過氧化氫酶,2014年土壤蔗糖酶表現(xiàn)為H+J和F+J顯著高于其他處理,較CK分別提高了10.68%和10.12%,2015年不同打孔與施微生物肥料處理比CK提高4.72%~9.84%,且腐殖酸(F)、H、T以及F+J處理顯著高于CK;2015年土壤過氧化氫酶表現(xiàn)為F和F+J顯著高于CK,提高了2.50%。(4)土壤全碳,速效鉀、速效氮,電導(dǎo)率分別為土壤蔗糖酶,脲酶,過氧化氫酶的關(guān)鍵影響因子,土壤全磷、速效磷為土壤微生物量的關(guān)鍵影響因子。綜合分析表明,施入復(fù)合微生物肥料與微生物菌劑有助于提高呼倫貝爾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學(xué)肥力狀況。
[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.
【作者單位】： 中國農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所//呼倫貝爾草原生態(tài)系統(tǒng)國家野外科學(xué)觀測研究站;內(nèi)蒙古農(nóng)業(yè)大學(xué)草原與資源環(huán)境學(xué)院;呼倫貝爾學(xué)院生命科學(xué)與化學(xué)學(xué)院;
【基金】：公益性行業(yè)(農(nóng)業(yè))科研專項(201303060) 國家重點研發(fā)計劃項目(2016YFC0500601) 中央級公益性科研院所基本科研業(yè)務(wù)費專項(1610132016033;1610132016027) 現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系建設(shè)專項(CARS-35-11)
【分類號】：S812.2

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