I= AGRO-PHYSIOLOGICAL RESPONSE OF BRASSICA CULTIVARS TO NUTRIENT MANAGEMENT UNDER SALINE CONDITIONS
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Title of Thesis
AGRO-PHYSIOLOGICAL RESPONSE OF BRASSICA CULTIVARS TO NUTRIENT MANAGEMENT UNDER SALINE CONDITIONS

Author(s)
M. Akhtar Shahzad
Institute/University/Department Details
University of Agriculture, Faisalabad, Pakistan. /Department of Agronomy
Session
2003
Subject
Agronomy
Number of Pages
292
Keywords (Extracted from title, table of contents and abstract of thesis)
brassica cultivars, nutrient management, under saline conditions, brassica nipus, salinity, fertilizer

Abstract
A series of experiments to develop a suitable fertilizer use technology for Brassica cultivars under saline conditions, were carried out at the Research Farm, Department of Agronomy and Animal Nutrition. University of Agriculture, Faisalabad during 1999-2000 and 2000-2001.

Results obtained are summarized as below:- Plant sown at 15dSm-1 salinity level showed a significant reduction in plant height, number of primary branches plant-1 number of pods plant-1, number of seeds per pod, 1000-seed weight, seed yield, straw yield, biological yield per plant and seed oil concentration in both years. Foliar ionic composition determined 60 days after planting showed a significant increase in leaf Na+ and decrease in K+ content at a salinity level of 15 dSm-1 over control. As regards Brassica cultivars, generally, cv. DGL exhibited a significant increase in plant height, pods per plant, seed per pod, 1000-seed weight, higher seed yield, straw yield, biological yield per plant and seed oil concentration than cv. Con-II. Cultivar DGL showed low leaf Na+ but high K+ contents against the reverse in Con-II. Addition of 150 kg N ha-1 at 15 dSm-1 salinity level resulted in a significant increase in different growth and yield parameters of the two Brassica cultivars. Foliar ionic composition showed decrease in Na+ and a significant increase in K+ with the application of 150 N ha-1 over control in both years. Application of NP (125-100)or NPK (125-100-100 kg ha-1) in solution culture experiments increased plant height, pods per plant, number of seeds per pod, 1000-seed weight, seed yield, straw yield and biological yield per plant and also seed oil concentration significantly over other treatments. Foliar Na+ content decreased while K+ content increased significantly with the applications of NP and NPK over control. In pot culture experiments application of NP (125-100 kg ha-1), NK (125-100 kg ha-1) or NPK (125-100 kg ha-1) increased plant height, number of pods plant-1, seed pod-1, 1000-seed weight, seed yield and biological yield plant-1 significantly over rest of the treatments including control. A significant decrease in foliar Na+ and increase in foliar K+ contrnt was also recorded in treatments where NP, NK and NPK were applied. Under saline field conditions, split application of nitrogen fertilizers appeared to be the best technique.

Placement of fertilizer in rows below the seed proved better than side drilling and broadcast as it improved growth and yield contributing attributes to a significant level.

Download Full Thesis
2824.4 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents
153.37 KB
2 1 Introduction 1
46.3 KB
3 2 Review of Literature 6
349.45 KB
  2.1 Origin of Brassica Nipus 7
  2.2 repeseed cultivation in Pakistan 8
  2.3 Effect of salinity at different growth stages of brassica spp 9
  2.4 Seed Oil Concentration 15
  2.5 Plant water relations 16
  2.6 Inorganic Nutrients 17
  2.7 Mechanism of salt tolerance 22
  2.8 Salinity and its Impact on Crop Productions 25
  2.9 Causes of Salinity in Pakistan 26
  2.10 Salinity-Fertility Relationship 28
4 3 Materials and Methods
130.84 KB
  3.1 Introduction 48
  3.2 Solution Culture Experiment 48
  3.3 Pot Culture Experiment 52
  3.4 Field Experiment 56
  3.5 Analytical Procedures 61
5 4 Experiment No1 “Response of Two Brassica Cultivars to Different Levels of Nitrogen under Saline Conditions in Solution Culture” 64
2037.59 KB
  4.1 Experiment No.2 “Effect of NPK Application on Two Brassica Cultivars Under Saline Conditions in Solution Culture” 99
  4.2 Experiment No.3 Effect of Different NPK Combinations on Two Brassica Cultivars Under Saline Consitions in Pot Culture 131
  4.3 Experiment No.4 Impact of time of NPK Application on Two Brassica Cultivars Grown Under Saline Field Conditions 166
  4.4 Experiment No.5 Growth and Yield Response of Two Brassica Cultivars to Different Methods of Fertilizer Application under Saline Field Conditions 204
6 5 Summary, Conclusions and Recommendations
376.48 KB
  5.1 Summary 236
  5.2 Conclusions 238
  5.3 Recommendations 239
  5.4 Future Strategies 240
  5.5 Literatures Cited 241
7 6 Appendices 283.
81.08 KB