Dissertation > Excellent graduate degree dissertation topics show

The Study on the Effect of Rapeseed Yield、Quality and Production Potential under Different Sowing Date and Density

Author: LiLi
Tutor: CaoCouGui
School: Huazhong Agricultural University
Course: Crop Cultivation and Farming System
Keywords: Rapeseed Sowing Date Density Production potential
CLC: S565.4
Type: Master's thesis
Year: 2005
Downloads: 474
Quote: 8
Read: Download Dissertation

Abstract


We studied the variety of rape’s development index such as development stage, leaves quantity, dry weight, branch quantity, numbers of pods per plant, and searched for the variety of those index how to affect the yield of rapeseed and quality of rapeseed. We also analyzed limiting factors of rape yield by the application of productive potential model. And we chose HuaShuang No.3 as experiment material.1. The difference of the rape development under different sowing dates was obvious, andthe rape yield and quality which related to the rape development also was greatly influenced. As we analyzed, higher yield could be acquired by reasonably sowing earlier in the Yangtze valley since the process of rape’s development could be adjusted and the potential of temperature was sufficiently utilized.2. The characters of rape development, such as leaves, dry-weight, height, branch, pods, increased with reasonably earlier sowing date, We also found that there was positive correlation between yield and those character of rape development (for example, the partial correlation coefficient between total growth season and the rape yield was 0.99**, the correlation coefficient between dry-weight and the rape yield was 0.67*, the correlation coefficient between the height of rape and the rape yield was 0.86*, the partial correlation coefficient between the leaves number and the rape yield was 0.98*) . So the conclusion was, high yield could be achieved by reasonably earlier sowing date.3. Rape with high density treatment attained high yield by higher quantity. We found that the development characters of rape in low density colony, such as leaves, dry-weight, height, branch, pods, was superior so high yield also reached.4. It could be found from the analysis of different production potential in different development stage under different sowing dates that the better application of the sunenergy and high temperature in Yangtze Valley could be realized by reasonably earlier sowing date, and the rape could grow better in the vegetative growth period and escaped from the bad influence of high temperature and the rain in the pods formation period. So all these factors based a foundation for later reproductive growth and high yield. The differences between productive potential under different densities was not obvious.5. Compared the production potential with the rape yields we found that the rape’s actual yield only attained 7% of radiation production potential, attained 11% of the thermal production potential, attained 20% of the climatic production potential, so the rapeseed still had greater potential of increase production.6. There wasn’t obvious difference between the qualities of rapeseed under different sowing dates and different densities. Therefore, to improving the qualities of the rape should depend on the improvement of breeding and reasonably handling of the fertilization.

Related Dissertations

  1. Determination of Soil Enzyme Activity and Extraction, Purification and MS Identification of Soil Microbial Total Protein,S154
  2. Research on Polyphenolics of Rapeseed,TS221
  3. Study on Producing Rapeseed Acei Peptides by Liquid-State Fermentation,TS229
  4. The Theoretical Study of Michael Addition,O621.25
  5. Study on Enzymatic Hydrolysis of Rapeseed Protein and Biological Activity of Hydrolysates,O629.8
  6. Electrochemical Model of Corrosion Rate of Steel Bars Embedded in Concrete in Different Corrosive Environments,TU375
  7. Tank treatment in vivo percutaneous absorption of ligustrazine hydrochloride impact study,R244.3
  8. The Function Analysis of miR396 in Tobacco,S572
  9. Experimental and Molecular Simulational Study on Phillips CrOx/SiO2 Catalysts for Their Active Center and Polymerization Mechanisms,TQ325.12
  10. Manufacturer Power Exercise, Conflict and Cooperation: The Moderating Effect of Network Structure of Dealer Group,F425;F224
  11. Expression of RRM2 in the Epithelian Ovarian Cancer and Its Relation to Tumor Vascularization,R737.31
  12. Effect of Zoledronic Acid on Bone Mass and Biomechanics in Orchidectomized Rats,R580
  13. Synthesis and Photoelectric Properties of Silole-containing Acetenyl Aromatic Copolymer,O633.5
  14. Audio watermarking study nonlinear detector,TP309.7
  15. Expression of Integrin αvβ5 in Cervical Cancer and Its Relevance with Angogenesis and Invasive Effect,R737.33
  16. Study on the Root Distribution of Ziziphus Jujuba and the Relationship between the Distribution and Soil Water and Nutrients in Hillside Fields,S665.1
  17. Cathode Materials Preparation and Its Electricity Generation Performance in Microbial Fuel Cells,TM911.4
  18. DFT Study on the Adsorption of TiCl4 and Electron Donor on MgCl2-supported Ziegler-Natta Propylene Polymerization Catalyst,TQ325.14
  19. Research on Mechanism of Calcium Sulfate Reductive Decomposition by Density Functional Theory,O614.231
  20. Theoretical study of small organic molecules catalyzed asymmetric reactions,O621.251
  21. The Research and Application of Mineralized Alteration of Remote Sensing Information Extraction in Liaoning Gongchangling Strip Mine,P627

CLC: > Agricultural Sciences > Crop > Economic crops > Oil crops > Rapeseed ( Brassica )
© 2012 www.DissertationTopic.Net  Mobile