| ABSTRACT | 第6-7页 |
| CHAPTER Ⅰ LITERATURE REVIEW | 第10-16页 |
| 1.1 Role of weeds in Agro-ecosystems | 第10-11页 |
| 1.2 Effects of Fertilizer application on weed and its seedbanks community | 第11-14页 |
| 1.3 Objectives | 第14-15页 |
| 1.4 Research Route | 第15-16页 |
| CHAPTER Ⅱ IMPACT OF LONG-TERM DIVERSE FERTILIZER MANAGEMENT ONWEED SPECIES AND COMMUNITIES IN WINTER WHEAT FIELDS UNDERIRRIGATED AND RAIN-FED CONDITIONS | 第16-36页 |
| 2.1 Introduction | 第16-18页 |
| 2.2 Materials and Methods | 第18-21页 |
| 2.2.1 Study site & Experimental design | 第18-20页 |
| 2.2.2 Research on weed community diversity | 第20页 |
| 2.2.3 Data Analyses | 第20-21页 |
| 2.2.4 Statistical Analysis | 第21页 |
| 2.3 Results | 第21-32页 |
| 2.3.1. Variation of soil nutrients and light transmittance in irrigated and rain-fedconditions | 第21-22页 |
| 2.3.2. Density and species composition of the weed communities | 第22-27页 |
| 2.3.3. Correlation analysis between the weed species community and soil environmentalfactors | 第27-31页 |
| 2.3.4. Influences of diverse fertilizer management on biodiversity of weed community | 第31-32页 |
| 2.4 Discussions | 第32-35页 |
| 2.5 Conclusion | 第35-36页 |
| CHAPTER Ⅲ IMPACT OF LONG-TERM DIVERSE FERTILIZER MANAGEMENT ONWEED SPECIES AND COMMUNITIES IN SUMMER MAIZE SEASON UNDERIRRIGATED AND RAIN-FED CONDITIONS | 第36-54页 |
| 3.1 Introduction | 第36-38页 |
| 3.2 Materials and Methods | 第38-39页 |
| 3.2.1 Study site & Experimental design | 第38页 |
| 3.2.2 Research on weed community diversity | 第38-39页 |
| 3.2.3 Data Analyses | 第39页 |
| 3.3 Results | 第39-51页 |
| 3.3.1. Variation of soil nutrients and light transmittance, under irrigated and rain-fedconditions | 第39-40页 |
| 3.3.2. Density and species composition of the weed communities | 第40-46页 |
| 3.3.3. Correlation analysis between the weed species community and soil environmentalfactors | 第46-50页 |
| 3.3.4. Influences of diverse fertilizer management on the biodiversity of the weedcommunity | 第50-51页 |
| 3.4 Discussions | 第51-53页 |
| 3.5 Conclusion | 第53-54页 |
| CHAPTER Ⅳ IMPACT OF LONG-TERM DIVERSE FERTILIZER MANAGEMENT ONWEED SEED BANK COMMUNITIES UNDER IRRIGATED (WINTER WHEAT-SUMMER MAIZE) AND RAIN-FED (WINTER WHEAT-SUMMER FALLOW)CONDITIONS | 第54-73页 |
| 4.1 Introduction | 第54-56页 |
| 4.2 Materials and Methods | 第56-57页 |
| 4.2.1 Study site & Experimental design | 第56页 |
| 4.2.2 Weed seed bank sampling | 第56页 |
| 4.2.3 Data Analysis | 第56-57页 |
| 4.2.4 Statistical Analysis | 第57页 |
| 4.3 Results | 第57-69页 |
| 4.3.1. Density and species composition of the weed seed bank | 第57-65页 |
| 4.3.2. Impacts of different fertilization on weed seed bank communities | 第65-67页 |
| 4.3.3. Influences of diverse fertilizer management on biodiversity of weed community | 第67-69页 |
| 4.4 Discussions | 第69-71页 |
| 4.5 Conclusion | 第71-73页 |
| REFERENCES | 第73-81页 |
| ACKNOWLEDGEMENTS | 第81-83页 |
| BIOGRAPHICAL SKETCH | 第83页 |
