發(fā)布時(shí)間：2021-07-22 08:53

　　在中國(guó)南方稻區(qū),冬季種植綠肥是改善土壤肥力和提高作物養(yǎng)分吸收的有效措施。研究不同綠肥品種（種類(lèi)）對(duì)土壤養(yǎng)分的利用能力在稻田綠肥應(yīng)用中有重要意義。傳統(tǒng)上,南方稻田冬綠肥主要采用紫云英（Astragalus sinicus L.）,對(duì)其他綠肥種類(lèi)關(guān)注不多,加之近年來(lái)綠肥品種也取得了不少創(chuàng)新,了解不同種類(lèi)綠肥及新綠肥品種的養(yǎng)分利用能力十分必要。本文選取南方稻區(qū)三個(gè)典型地點(diǎn)（廣西南寧、湖南祁陽(yáng)、四川南充）開(kāi)展研究。廣西、湖南采用盆栽試驗(yàn),設(shè)置單施磷（P1K0）、單施鉀（P0K1）、施磷鉀（P1K1）、不施（P0K0）處理,評(píng)價(jià)了主栽綠肥紫云英對(duì)磷鉀肥的響應(yīng)。在三地采用田間微區(qū)試驗(yàn),研究了不同冬季綠肥對(duì)土壤磷和鉀的吸收能力以及對(duì)土壤性狀和土壤胞外酶活性的影響。其中,廣西和湖南兩點(diǎn)包括6個(gè)紫云英主栽品種（閩紫6號(hào)、寧波大橋、皖紫1號(hào)、湘紫1號(hào)、弋江籽和余江大葉）以及毛葉苕子（Vicia villosa L.）、箭筈豌豆（Vicia sativa L.）;四川設(shè)置了光葉苕子（Vicia dasycarpa L.）、毛葉苕子、箭筈豌豆、山黧豆（Lathyrus sativus L.）、紫云英、二月蘭（... 

【文章來(lái)源】：中國(guó)農(nóng)業(yè)科學(xué)院北京市

【文章頁(yè)數(shù)】：77 頁(yè)

【學(xué)位級(jí)別】：博士

【文章目錄】：
附件
摘要
Abstract
Abbreviations
CHAPTER Ⅰ INTRODUCTION
    1.1 Phosphorus(P)and Potassium(K)uptake in green manure
    1.2 Effects of green manure on available P and K of soil
    1.3 Effects of green manure crops on soil enzymatic activities
    1.4 Role of enzymes and its relationship with soil properties
    1.5 Existing problem
    1.6 Scientific Questions
    1.7 Objectives and technical route
        1.7.1 Objectives
        1.7.2 Technical route
Chapter Ⅱ Materials and Methods
    2.1 Experimental designs
    2.2 Plant and soil sampling
    2.3 Measurements
        2.3.1 Determination of soil and plant
        2.3.2 Soil enzymatic activities analysis
    2.4 Statistical analyses
Chapter Ⅲ Responses of milk vetch to P and K application
    3.1 Plant shoots and roots biomass
    3.2 P and K uptake
    3.3 Soil total nitrogen and mineral nitrogen
    3.4 Soil available P and K
    3.5 Soil enzymatic activities
    3.6 Correlation between soil enzymes and soil properties
    3.7 Summary
Chapter Ⅳ Accumulations of biomass and P,K in different green manure crops in different paddy fields
    4.1 Plant above-ground biomass accumulation
    4.2 Shoots P and K accumulation
    4.3 Summary
Chapter Ⅴ Effects of planting green manure crops on soil enzyme activities and soil nutritional properties in different paddy soils
    5.1 Soil enzyme activities
    5.2 Soil nutritional properties
        5.2.1 Soil organic matter and total nitrogen
        5.2.2 Soil mineral nitrogen
        5.2.3 Soil available P and K
        5.2.4 Soil pH
    5.3 Summary
Chapter Ⅵ Relationships among soil enzymatic activities and soil properties under planting different green manures in different paddy soils
    6.1 Relationship among P,K uptake and soil enzymes
    6.2 Relationships among soil properties and soil enzymes
    6.3 Relationships among green manure species and soil properties
    6.4 Correlation among pH and available P, K concentration of the soil
    6.5 Summary
Chapter Ⅶ Discussion
    7.1 Milk vetch influenced by P and K fertilization
    7.2 P and K accumulation in different green manures in various paddy soils
    7.3 Soil enzymatic activities differed in different paddy soils under plantation of different green manures
    7.4 Relationships among P and K uptake,soil properties,and enzymatic activities
Chapter Ⅷ Conclusions,innovations,and prospects
    8.1 Conclusions
        8.1.1 Responses of milk vetch to P and K application
        8.1.2 Performances of various green manures in different paddy fields as for P,K accumulation
    8.2 Research innovation
    8.3 Future research prospects
References
Acknowledgements
Resume



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