本文選題：污泥施用　切入點：土壤呼吸　出處：《遼寧大學》2017年碩士論文　論文類型：學位論文

【摘要】：現(xiàn)如今,城市污泥量增長迅速。污泥中含有大量營養(yǎng)物質(zhì)和有機物,而且由于工業(yè)生產(chǎn)中所產(chǎn)生的污水的進入,城市污泥中又夾雜了大量有害物質(zhì)。污泥的處理方法大致分為土地利用、焚燒法和衛(wèi)生填埋法等。土地利用又分成了城市綠化、農(nóng)用以及土地修復(fù)。污泥中富含大量有機質(zhì)和營養(yǎng)元素,是很好的肥料,施入會使土地增強肥力,增加土壤中酶的活性,從而有助于植物的生長。污泥的土壤修復(fù)能夠改善其理化性質(zhì),利于生態(tài)恢復(fù),還可以保持水土利用城市污泥中含有營養(yǎng)元素的特點,通過污泥施用起到提高沙質(zhì)草地水土保持能力,恢復(fù)植被及微生物活性,改良土壤結(jié)構(gòu)的作用。同時避免了污泥農(nóng)用時把其中可能存在的未處理完全的有害物質(zhì)帶入食物中,危害人體健康的風險。本文選取土壤呼吸和DOC兩方面研究。土壤呼吸在全球生態(tài)系統(tǒng)中意義重大,因此對其研究也就十分必要。污泥施用究竟土壤呼吸過程產(chǎn)生了什么樣的作用?當前少有研究,并且所得出的結(jié)論存才較大的不確定性。所以本文通過對土壤各種理化指標的測定,以期為今后針對沙質(zhì)草地的相關(guān)研究提供數(shù)據(jù)支持和理論依據(jù)。而對與DOC的分析有助于進一步認知全球碳循環(huán)的規(guī)律。由于影響土壤DOC的因子十分復(fù)雜,許多問題都需要更深入探討。所以,本文僅選擇溫度、含水量等指標對其進行分析,試圖為今后的相關(guān)研究提供一些幫助。通過對土壤呼吸的研究發(fā)現(xiàn):污泥施用對土壤呼吸有促進作用;在溫度相似時,土壤含水率的增大對土壤呼吸同樣有著促進的作用;說明污泥施用對沙質(zhì)草地生物量的增加有較大的促進作用;而植物數(shù)量增幅最小,說明污泥施用對沙質(zhì)草地植物個體生長的促進作用比增加植物個數(shù)的效果明顯的多。通過對土壤DOC的分析發(fā)現(xiàn):施用的污泥中蛋白類化合物的含量較高;土壤含水率與DOC的具有顯著相關(guān)性,P值為0.047小于0.05,相關(guān)性0.521。在0.3-0.7之間,屬于中度相關(guān)。;施用污泥后,土壤呼吸速率有明顯的下降;土壤中營養(yǎng)物質(zhì),尤其是N含量,對土壤DOC有促進作用。
[Abstract]:Nowadays, the amount of sludge in cities is growing rapidly. Sludge contains a lot of nutrients and organic matter, and because of the entry of sewage produced in industrial production, Sludge treatment is divided into land use, incineration and sanitary landfill, etc. Land use is divided into urban greening. Agriculture and land remediation. Sludge, which is rich in organic matter and nutrients, is a good fertilizer that increases the fertility of the land and the activity of enzymes in the soil. The soil remediation of sludge can improve its physical and chemical properties, be beneficial to ecological restoration, and can also preserve the characteristics of soil and water utilization of urban sludge containing nutrients. Sludge application can improve soil and water conservation ability of sandy grassland, restore vegetation and microbial activity, and improve soil structure. This paper studies soil respiration and DOC. Soil respiration is of great significance in the global ecosystem. Therefore, it is necessary to study it. What effect does sludge application have on soil respiration? At present, there is little research, and the conclusion is uncertain. Therefore, through the measurement of various physical and chemical indexes of soil, In order to provide data support and theoretical basis for future research on sandy grassland, the analysis with DOC is helpful to further understand the law of global carbon cycle. Because the factors affecting soil DOC are very complex, Many problems need to be discussed in depth. Therefore, this paper only selects the temperature, water content and other indicators to analyze them. Through the research on soil respiration, it is found that sludge application can promote soil respiration, and the increase of soil moisture content can also promote soil respiration when the temperature is similar. The results showed that sludge application could promote the increase of biomass of sandy grassland, but the increase of plant quantity was the least. The results showed that the effect of sludge application on individual growth of sandy grassland was more obvious than that on increasing the number of plants. Through the analysis of soil DOC, it was found that the content of protein compounds in the applied sludge was higher. The significant correlation between soil moisture content and DOC was 0.047 < 0.05, and the correlation was 0.521. Between 0.3 and 0.7, the soil respiration rate was significantly decreased, especially the N content, the soil respiration rate was significantly decreased after application of sludge, and the soil nutrient content, especially the nitrogen content, was found in the soil. It can promote soil DOC.
【學位授予單位】：遼寧大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X53;X703

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