种植翻压绿肥及施氮量对旱地冬小麦生长的影响

发布时间：2021-07-22 20:51

　　在中国干旱地区,夏休闲期种植豆科绿肥是一种可以提高土壤肥力、防止土壤侵蚀、提高降雨利用率、减少肥料施用的环境友好型土壤改良措施,有利于农业可持续发展。本研究为了明确这一地区豆科和油菜绿肥在冬小麦（Triticumaestivum L.）养分资源管理方面重要的作用,布置了2年田间定位试验,采用裂区设计,主处理为3种冬小麦轮作体系:冬小麦—夏休闲、冬小麦—黑麦豆（Phaseolus vulgaris）以及冬小麦—油菜（Brassica napus L.）,副处理为5个冬小麦生长季施氮水平(0、60、120、180和240 kg N ha^-1)。本研究目的是通过2年田间试验,研究不同绿肥和氮肥用量对冬小麦—夏休闲体系中冬小麦产量和土壤性质的影响。结果表明,（1）两年的降雨量小于480 mm,为干旱年份。在施氮量为60 kg N ha^-1时,黑麦豆、油菜和休闲处理小麦产量均最大,该地区农户平均施氮量为180 kg N ha^-1,具有减施氮肥的潜力。（2）试验第二年,种植并翻压黑麦豆和油菜降低了小麦水分利用效率,降幅分别为18%和... 

【文章来源】：西北农林科技大学陕西省 211工程院校 985工程院校 教育部直属院校

【文章页数】：53 页

【学位级别】：硕士

【文章目录】：
摘要
abstract
CHAPTER I LITERATURE REVIEW
    1.1 Introduction
    1.2 Wheat production in dryland cropping system of China
    1.3 N fertilizer use situation in China
    1.4 Background and benefits of green manure
    1.5 Purpose and significance of the selected topic
    1.6 Research Route
CHAPTER II RESEARCH METHODOLOGY
    2.1 Study site & Experimental design
    2.2 Field Management
    2.3 Measurements
    2.4 Data Analyses
    2.5 Statistical Analysis
CHAPTER III RESULTS
    3.1 Precipitation during experiment
    3.2 Green manure and nutrient retention
    3.3 Impact of combined of different green manure and N fertilizer on wheat yield
        3.3.1 Yield, biomass and harvest index of winter wheat
        3.3.2 Nutrient contents in wheat grain
        3.3.3 Nutrient uptake in wheat grain
        3.3.4 Nutrients uptake by wheat total biomass
        3.3.5 Nitrogen use efficiency of winter wheat
        3.3.6 Growth of winter wheat
        3.3.7 Components of winter wheat yield
    3.4 Impact of combined of different green manure and N fertilizer on soil properties
        3.4.1 Soil nitrate-N
        3.4.2 Soil Available P
        3.4.3 Soil water storage, wheat water consumption and water use efficiency of wheat ..
CHAPTER IV DISCUSSION
CHAPTER V CONCLUSION
REFFRENCES
ACKNOWLEDGEMENTS
ABOUT AUTHOR


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