隨著世界人口的迅速增長,人們對糧食的需求量日益增加,集約化農(nóng)業(yè)是從有限的上地資源中獲得更高糧食產(chǎn)量必不可少的措施。目前,設(shè)施蔬菜生產(chǎn)在我國已經(jīng)得到廣泛應(yīng)用,并且其產(chǎn)量在中國市場的比重日益增加,已經(jīng)遠遠超出世界其他國家。小麥玉米輪作系統(tǒng)對于保證充足的糧食供應(yīng)也至關(guān)重要。在集約化生產(chǎn)模式下,農(nóng)業(yè)種植管理方式對土壤碳循環(huán)具有重要影響。因此,評估這些系統(tǒng)對土壤碳固持的潛力是很有必要的,這不僅有利于減少溫室氣體的排放,同時也有利于增加這些系統(tǒng)的可持續(xù)。上壤碳由有機碳和無機碳兩部分組成。目前對于土壤有機碳循環(huán)的研究較多,但很少有人重視這些系統(tǒng)中土壤無機碳的循環(huán)過程。本研究在壽光和曲周選擇了兩個設(shè)施蔬菜生產(chǎn)體系,此外還對露地小麥玉米系統(tǒng)進行了評估。壽光設(shè)施蔬菜生產(chǎn)系統(tǒng)主要研究兩種灌溉方式以及二三種有機肥的施用方式,曲周設(shè)施蔬菜生產(chǎn)采用傳統(tǒng)的有機肥和化肥結(jié)合施用方式,并且選取一塊自然未耕作土地作為空白對照。露地冬小麥一夏玉米生產(chǎn)系統(tǒng)也采用類似的施肥方式。研究測定了200 cm土層處土壤有機碳和無機碳的含量,同時還分析了不同粒徑土壤組分中有機碳的循環(huán)過程,用以評估不同形態(tài)有機碳的穩(wěn)定性。為了更詳細的評價這...

【文章頁數(shù)】：123 頁

【學(xué)位級別】：博士

【文章目錄】：
ABSTRACT
中文摘要
General Introduction
CHAPTER Ⅰ Literature Review
    Ⅰ-1- The Global Warming
    Ⅰ-2- Soil Organic Carbon Dynamics in Agricultural Soils
    Ⅰ-3- Soil Inorganic Carbon Dynamics in Agricultural soils
    Ⅰ-4- Intensive agriculture in China
    Conclusions
CHAPTER Ⅱ Background and Objectives
    Ⅱ-1- Background
    Ⅱ-2- Objectives of the present investigation and experimental set-up
CHAPTER Ⅲ Impact of Different Types of Irrigation and OrganicAmendments on Organic Carbon in Soil Profile and Physical Fractions underGreenhouse Vegetable Production
    Abstract
    Ⅲ-1- Introduction
    Ⅲ-2- Material and methods
    Ⅲ-3- Results
    Ⅲ-4- Discussion
    Ⅲ-5- Conclusions
CHAPTER Ⅳ Impact of Varying Types of Irrigation and OrganicAmendments on Soil Inorganic Carbon under Greenhouse VegetableProduction
    Abstract
    Ⅳ-1- Introduction
    Ⅳ-2- Materials and methods
    Ⅳ-3- Results
    Ⅳ-4- Discusssion
    Ⅳ-5- Conclusions
CHAPTER Ⅴ Impact of Organic, Integrated and Conventional Fertilization onOrganic Carbon in Soil Profile and Physical Fractions under GreenhouseVegetable Production
    Abstract
    Ⅴ-1- Introduction
    Ⅴ-2- Material and methods
    Ⅴ-3- Results
    Ⅴ-4- Discussion
    Ⅴ-5- Conclusions
CHAPTER-Ⅵ Impact of Organic, Integrated and Conventional Fertilizationon Soil Inorganic Carbon under Greenhouse Vegetable Production
    Abstract
    Ⅵ-1- Introduction
    Ⅵ-2- Material and methods
    Ⅵ-3- Results
    Ⅵ-4- Discussion
    Ⅵ-5- Conclusion
CHAPTER-Ⅶ Neo formation of Pedogenic Carbonates by Irrigation andFertilization and Their Contribution to Carbon Sequestration in Soil
    ABSTRACT
    Ⅶ-1- Introduction
    Ⅶ-2- Materials and methods
    Ⅶ-3- Results
    Ⅶ-4- Discussion
    Ⅶ-5- Conclusions
Chapter Ⅷ General Discussion
    Ⅷ-1- Impacts of farming practices on soil organic carbon
    Ⅷ-2- Impacts of farming practices on soil inorganic carbon
Conclusions and Perspectives
REFERENCES
Acknowledgements
DEDICATION
CURRICULUM VITAE



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