SYMBIOTIC NITROGEN FIXATION AND CONTRIBUTION TO SOIL NITROGEN BY GROUNDNUT (ARACHIS HYPOGAEA L) GENOTYPES IN THE NORTHERN GUINEA SAVANNA OF NIGERIA

By

Author

Presented To

Department of Agricultural Science

84 Pages 6,983 Words 724 Views PDF Format No. of Chapters: 1 to 5 Chapters
Reference/Bibliography: YES 4,000 NGN 3,500 NGN PROJECT
ABSTRACT
Evaluation of existing groundnut genotypes for nitrogen fixation may be useful as selection criteria for high nitrogen fixation thereby minimizing the high cost of inorganic fertilizer and its associated environmental consequences. The objectives of this study were to determine symbiotic nitrogen fixation and contribution to soil nitrogen by groundnut (Arachis hypogaea L). The treatments consisting ten groundnut genotypes(SAMNUT 24, SAMNUT 22,ARRORSICGX-SM 00017/5/P15/P2, SAMNUT 10, ICIAR 7B, ARRORSICGX 000201/5/P4P10, SAMNUT 21, SAMNUT 23 and SAMNUT 14) and two rates of nitrogen fertilizer (0 and 30 kg/ha) were laid out in a split plot design with three replications under rain-fed conditions in 2011 and 2012. Nitrogen fixation parameters were measured/calculated as nodule number, nodule dry weight, plant total nitrogen, biologically fixed N, nitrogen derived from atmosphere (Ndfa) and soil nitrogen balance while agronomic data determined were shoot and root dry weights, 100-seed weight, pod and haulm yield, harvest index (HI) and nitrogen harvest index (NHI). The difference between years was significant for most variables with 2011 statistically out-performing 2012 except for HI, pod yield and 100-seed weight which maintained similar trend in both years. ARRORS-ICGX 000201/5/P4P10 (29.11 kg N/ha) and SAMNUT 23 (22.27 kg N/ha) were the best genotypes in terms of biological nitrogen fixation, nodule number, nodule dry weight, HI and NHI. SAMNUT 14 and 6AT which fixed relatively lower amount of N2; 17.10 and 19.95 kg/ha respectively, impacted positively on the soil N balance than all other genotypes in 2011. These genotypes had lower NHI than the highest N2 fixers which mean that most of the N derived from BNF was not translocated to the seeds but retained in other plant parts such as shoot and root. 9 Application of 30 kg N ha-1 significantly increased the agronomic and nitrogen fixation parameters. Wide variations exist in the pod yield across the genotypes. ARRORSICGX 000201/5/P4P10 with an average pod yield of 2670 kg/ha was the best genotype in our recent finding. The result of the interaction between nitrogen rates and groundnut genotypes indicates that ARRORS-ICGX 000201/5/P4P10 (2739 kg/ha) and SAMNUT 22 (3346 kg/ha) performed best even without the addition of the starter dose of nitrogen fertilizer signifying their ability to reduce the cost of production by saving cost on inorganic fertilizer. However, the N starter dose would be necessary to prevent soil N mining in view of the overall negative soil N balance obtained despite application of 30 kg N ha-1 to all genotypes. In conclusion, groundnut genotypes used in this study could be grouped into three distinct categories based on the amount of biologically fixed nitrogen and pod yield. ARROS-ICGX000201/5/P4P10 and SAMNUT 22 are both high fixing and high yielding; 6AT was high fixing and low yielding; but contributing positively to the soil nitrogen balance; while SAMNUT 21 and ICAR 7B are low fixing. The remaining genotypes could not be classified into any of these groups. Similarly, the results of principal component analysis conducted in the measured parameters suggest that future breeding effort should be targeted at improving the efficiency

PLEASE NOTE

This material is a comprehensive and well-researched project, structured into
(1 - 5) chapters for clarity and depth.


To access the full content:

Click the Download Button Below

Or contact our support team via Call/WhatsApp: 09019904113 for further inquiries.

Thank you for choosing us!

84 Pages 6,983 Words 724 Views PDF Format No. of Chapters: 1 to 5 Chapters
Reference/Bibliography: YES 4,000.00 NGN 3,500 NGN PROJECT

About E-Project Material Centre


E-Project Material Centre is a web service aimed at successfully assisting final year students with quality, well researched, reliable and ready made project work. Our materials are recent, complete (chapter 1 to Minimum of Chapter 5, with references) and well written.INSTANT ACCESS! INSTANT DOWNLOAD. Simply select your department, choose from our list of topics available and explore your data

Why Students Love to Use E-Project Material ?


Guaranteed Delivery Getting your project delivered on time is essential. You cannot afford to turn in your project past the deadline. That is why you must get your project online from a company that guarantees to meet your deadline. e-Project Topics Material Centre is happy to offer instant delivery of projects listed on our website. We can handle just about any deadline you send our way. Satisfaction Guaranteed We always do whatever is necessary to ensure every customer's satisfaction

Disclaimer


E-Project Topics Material Centre will only provide projects as a reference for your research. The projects ordered and produced should be used as a guide or framework for your own project. The contents of the projects should be able to help you in generating new ideas and thoughts for your own project. It is the aim of e-Project Topics Centre to only provide guidance by which the projects should be pursued. We are neither encouraging any form of plagiarism nor are we advocating the use of the projects produced herein for cheating.

Terms and Condition


Using our service is LEGAL and IS NOT prohibited by any university/college policies You are allowed to use the original model papers you will receive in the following ways:
  • As a source for additional understanding of the subject
  • As a source for ideas for you own research (if properly referenced)
  • For PROPER paraphrasing ( see your university definition of plagiarism and acceptable paraphrase) Direct citing ( if referenced properly)
Thank you so much for your respect to the authors copyright
e-projecttopics.com © copyright 2024 || Nigeria|| My IP - 0.0.0.0 || 0
Designed By: Powersoft Technology
X

Need Help Finding or Downloading Your Project Material?

If you don't see the topic you're looking for or You need urgent/express attention, click the WhatsApp Icon/link below to contact ADMIN and get the material you need instantly. We are always available online to attend to your needs. Thanks