英文文摘
1.INTRODUCTION
1.1 COTTON AND ITS GROWTH
1.2 COTTON PRODUCTION
1.3 COTTON GROWTH AND NITROGEN
1.4 NITROGEN UPTAKE BY COTTON PLANT
1.5 NITROGEN FERTILIZATION
1.6 AIM AND SIGNIFICANCE
2.MATERIALS AND METHODS
2.1 EXPERIMENTAL SITE
2.2 EXPERIMENTAL DESIGN
2.2.1 Pot experiment
2.2.2 Field experiment
2.3 DATA COLLECTION
2.3.1 Cotton growth
2.3.2 Cotton yield
2.3.3 Chlorophyll content
2.3.4 Biomass accumulation
2.3.5 Plant nutrient content
2.4 Data Analysis
2.4.1 Dry Matter Accumulation
2.4.2 Nitrogen Accumulation
3.RESULTS
3.1 COTTON GROWTH PROCESS AS AFFECTED BY DIFFERENT NITROGEN RATIO
3.1.1 Pot cottton plants growth process
3.1.2 field cotton growth process
3.2 CHLOROPHYLL CONTENT
3.3 DRY MATTER WEIGHT ACCUMULATION
3.3.1 Dry matter accumulation at different growth stages
3.3.2 Dry matter accumulation model
3.4 THE DRY MATTER ACCUMULATION CHARACTERISTICS
3.5 COTTON YIELD AND ITS COMPONENTS
3.5.1 Boll number
3.5.2 Boll weight
3.5.3 Seed cotton yield
3.5.4 Lint yield
3.6 NUTRIENTS ABSORPTION BY COTTON PLANTS UNDER DIFFERENT DEVELOPMENT STAGES
3.6.1 Nitrogen absorption by cotton plants
3.6.2 Plants nutrient content at different cotton growth stages
4.SUMMARY AND DISCUSSION
4.1 SUMMARY
4.1.1 The process of cotton growth
4.1.2 Cotton yield and its components
4.1.3 Cotton chlorophyll content characteristics
4.1.4 Cotton nutrient absorption
4.2 CONCLUSION
5 REFERENCES
ACKNOWLEDGEMENTS
