Effects Of Fertilizers On Soil Microbial Diversity, Growth And Yield Of Two Pasture Grasses

Project and Seminar Material for Soil Science

Effects Of Fertilizers On Soil Microbial Diversity, Growth And Yield Of Two Pasture Grasses


A 6 month study was conducted in the screen house and laboratory of the Department of Crop Science, Faculty of Agriculture, University of Benin, Benin City. The objective was to ascertain the effects of fertilizers on soil microbial diversity growth and yield of two forage grasses. The experiment was set up in a Completely Randomized Design (CRD) arrangement.

There were 10 factorial treatments, made up from five fertilizers (Control, Anthropogenic liquid waste a (1:3 and 1:6 dilutions), NPK and cattle dung) and two forage grasses (Sorghum almum and Panicum maximum) replicated three times. The parameters measures were sward height, sward regrowth, fresh and dry herbage yields. Serial dilution of the fertilized soils was carried out to enumerate the microbial populations. Generally, Anthropogenic liquid waste (1:3) and NPK(15:15:15) were equal in performance and better than the other fertilizers in terms of herbage growth (sward height and sward regrowth). Anthropogenic liquid waste (1:3) produced the significantly highest fresh and dry herbage yields among the fertilizers.

Furthermore Anthropogenic liquid waste (1:3) favoured the highest proliferation of microbes. The favourable response of the grasses and the higher microbial population in the soil treated with Anthropogenic liquid waste implies that this fertilizer contains high quantities of readily available plant nutrients.

Table Of Contents

  • Title page
  • Certification
  • Dedication
  • Acknowledgment
  • Table of contents
  • List of Tables
  • Abstract

Chapter One

  • 1.0 Introduction
  • 1.1 Objective of the Study

Chapter Two

  • 2.0 Literature Review
  • 2.1 Soil Microbial Diversity
  • 2.2 Effects of Anthropogenic Waste Liquid on Soil Microbes
  • 2.3 Effects of Chemical Fertilizers on Soil Microbes
  • 2.4 Effects of Cattle Dung on Soil Microbes
  • 2.5 Human Urine as a Fertilizer
  • 2.6 Response of panicum maximum to Fertilization
  • 2.7 Response of sorghum almum to Fertilization
  • 2.8 Description of Test Crops
  • 2.8.1 panicum maximum
  • 2.8.2 sorghum almum

Chapter Three

  • 3.0 Materials and Method
  • 3.1 Experimental Site
  • 3.2 Collection of soil Sample, Seed and Fertilizer
  • 3.3 Experimental Layout
  • 3.4 Fertilizer Application
  • 3.5 Data Collection
  • 3.5.1 Sward Height (cm)
  • 3.5.2 Sward Re-growth (cm)
  • 3.5.2 Fresh Herbage Yield (g)
  • 3.5.3 Dry Herbage Yield (g)
  • 3.6 Statistical Analysis
  • 3.7 Soil Sample Microbial Analysis
  • 3.7.1 Enumeration of Micro-Organism in Soil Samples From Different Treatments using the Serial Dilution Method
  • 3.7.2 Equipment Used
  • 3.7.3 Materials
  • 3.7.4 Medium Used
  • 3.7.5 Media Preparation
  • 3.7.6 Preparation of Sample
  • 3.7.7 Inoculation
  • 3.7.8 Incubation

Chapter Four

  • 4.0 Result

Chapter Five

  • 5.0 Discussion

Chapter Six

  • 6.0 Conclusion
  • Reference

List Of Tables

  1. Table 1: Physical and Chemical Properties of the Experimental soil
  2. Table 2: Effect of Fertilizer on Sward Height at 2,4 and 6 weeks after sowing
  3. Table 3: Effect of Fertilizers on the Sward Regrowth at 2, 4 and 6 weeks after sowing
  4. Table 4:Effect of Fertilizers on Herbage Yield
  5. Table 5: Enumeration of Microbial Population for the Various Treatment

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