發(fā)布時間：2018-05-24 11:58

  本文選題：無害化污泥 + 沙質(zhì)潮土��； 參考：《環(huán)境科學》2017年03期

【摘要】：以小麥-玉米輪作體系下的沙質(zhì)潮土為研究對象,選用經(jīng)無害化處理后符合國家標準且在推薦量范圍內(nèi)的商業(yè)化污泥產(chǎn)品,通過2013~2015年田間定位試驗,研究無害化污泥施用對沙質(zhì)潮土土壤碳庫組分和碳庫管理指數(shù)的影響,為無害化污泥資源化利用提供理論和技術(shù)依據(jù).結(jié)果表明,與不施無害化污泥處理(CK)相比,土壤總有機碳(TOC)、微生物量碳(SMBC)、易氧化有機碳(LOC)和可溶性有機碳(DOC)施用污泥各處理分別顯著增加到了8.40~14.74 g·kg-1、164.45~257.45 mg·kg-1、3.58~4.88 g·kg-1和81.16~101.58 mg·kg-1(P0.05),其中各活性有機碳組分SMBC、LOC和DOC分別顯著提高了84.00%~188.07%,26.26%~58.03%和109.58%~185.39%(P0.05),其中45 t·hm~(-2)污泥(W3)處理提升效果最明顯;施污泥各處理土壤微生物量熵(SMBC/TOC)和易氧化有機碳有效率(LOC/TOC)均有升高趨勢,提高范圍分別為8.02%~2.77%和13.75%~46.48%,土壤可溶性有機碳有效率(DOC/TOC)施污泥各處理分別顯著降低了17.06%~40.94%(P0.05),并且隨污泥施用量的增大,SMBC/TOC、LOC/TOC和DOC/TOC呈下降趨勢,說明施用45 t·hm~(-2)污泥增大了土壤中穩(wěn)定態(tài)碳含量,導致其比值降低;施污泥各處理土壤碳庫活度(L)和碳庫指數(shù)(LI)隨污泥施用量增大而降低,說明施用45 t·hm~(-2)污泥其土壤穩(wěn)定態(tài)碳含量高,有利于沙質(zhì)潮土土壤有機碳的積累;施污泥各處理土壤碳庫管理指數(shù)(CMPI)顯著提高了153.45%~195.40%,其中W3處理提升效果最為明顯;通過相關性分析及冗余分析得出,用CMPI來表征土壤肥力的變化比用TOC更靈敏、直接,能更好地反映出土壤養(yǎng)分及碳庫的動態(tài)變化.綜上,施用15~45 t·hm~(-2)污泥可以顯著提高沙質(zhì)潮土土壤活性碳庫各組分含量和碳庫管理指數(shù),尤以施用45 t·hm~(-2)(W3)污泥效果最為顯著.
[Abstract]:Taking sandy tidal soil under wheat-maize rotation system as the research object, commercial sludge products, which met the national standard after harmless treatment and within the recommended amount, were selected, and the field positioning test was carried out from 2013 to 2015. The effects of harmless sludge application on soil carbon pool composition and carbon pool management index in sandy aquic soil were studied in order to provide theoretical and technical basis for the utilization of harmless sludge. The results showed that, compared with non-harmful sludge treatment, Soil total organic carbon (TOC), microbial biomass carbon (MBC), easily oxidized organic carbon (OOC) and soluble organic carbon (SOC) were significantly increased to 8.40 ~ 14.74 g kg-1164.45~257.45 路kg ~ (-1) C ~ (-1) 3.58 ~ 4.88 g kg-1 and 81.16 ~ 101.58 mg / kg ~ (-1) P _ (0.05) kg-1, respectively. The active organic carbon fractions SMBCU LOC and DOC were significantly increased, respectively. 84.00% and 109.58% and 185.399.58%, including 45t / hm ~ (-2) sludge / W _ 3) treatment, respectively, with 58.03% and 109.58%, respectively, of which the lifting effect was the most obvious (P 0.05% and 109.58%, respectively), especially in the sludge treatment (45 t / hm ~ (-2). The soil microbial biomass entropy (MBC / TOC) and the effective rate of oxidized organic carbon (OOC) increased with the application of sludge, and the soil microbial biomass entropy (SMBC / TOC) and the effective rate of oxidized organic carbon (OOC) increased. The increase ranges were 8.02% and 13.75%, respectively. The soil soluble organic carbon efficiency and the soil soluble organic carbon efficiency decreased significantly by 17.06% and 40.94% (P0.05), respectively, and decreased with the increase of sludge dosage, indicating that the application of 45 t 路hm ~ (-2) sludge increased the stable carbon content in the soil. As a result, the ratio of soil carbon pool activity (L) and carbon pool index (Li) decreased with the increase of sludge application rate, which indicated that the application of 45 t / h ~ (-2) sludge had a high soil stable carbon content, which was beneficial to the accumulation of soil organic carbon in sandy aquic soil. The soil carbon pool management index (CMP I) of sludge treatment increased significantly by 153.45% and 195.40%, among which the effect of W3 treatment was the most obvious. Through correlation analysis and redundancy analysis, it was concluded that CMPI is more sensitive and direct than TOC to characterize the change of soil fertility. It can better reflect the dynamic change of soil nutrient and carbon pool. In conclusion, the application of 1545 t / h ~ (-1) sludge could significantly increase the content of active carbon pool and the management index of carbon pool in sandy aquic soil, especially the application of 45 t / h ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) sludge was the most effective.
【作者單位】： 中國農(nóng)業(yè)科學院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所耕地培育技術(shù)國家工程實驗室;鄭州市污水凈化有限公司;四川農(nóng)業(yè)大學環(huán)境學院;
【基金】：國家自然科學基金項目(21577172,41501322) 國家國際科技合作專項(2015DFA20790) 國家重點基礎研究發(fā)展規(guī)劃(973)項目(2013CB127406) 中央級公益性科研院所科研業(yè)務費專項(IARRP-2015-21)
【分類號】：X703;X144

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