Beschreibung
InhaltsangabePreface. 1. Introduction. 2. Assessment of nitrogen fixation in Azolla using the 15N isotope dilution technique. 3. Comparison of the direct and indirect 15N methods for evaluation of N uptake by rice from Azolla. 4. 15N labelled ammonium sulphate vs 15N labelled urea as a source for labelling Azolla with 15N. 5. Effects of applying urea and Azolla on N uptake and yield of rice. 6. Coordinated field evaluation of Azolla N uptake and yield response of rice in Bangladesh, China, Indonesia, Pakistan, the Philippines, Sri Lanka and Thailand. 7. Residual effects of Azolla N to a second crop of rice or wheat. 8. A comparative study of the effects of Azolla species and strain on availability of N to rice. 9. Comparison of the availability of N from fresh vs dried Azolla. 10. Effects of phosphorus fertilization on growth and N accumulation in Azolla. 11. Nitrogen balance studies in Azolla/rice cropping systems. 12. Increasing fertilizer use efficiency of urea using Azolla cover. 13. Summary and conclusions. 14. References. Appendix.
Inhaltsverzeichnis
Preface. 1. Introduction. 2. Assessment of nitrogen fixation in Azolla using the 15N isotope dilution technique. 3. Comparison of the direct and indirect 15N methods for evaluation of N uptake by rice from Azolla. 4. 15N labelled ammonium sulphate vs 15N labelled urea as a source for labelling Azolla with 15N. 5. Effects of applying urea and Azolla on N uptake and yield of rice. 6. Coordinated field evaluation of Azolla N uptake and yield response of rice in Bangladesh, China, Indonesia, Pakistan, the Philippines, Sri Lanka and Thailand. 7. Residual effects of Azolla N to a second crop of rice or wheat. 8. A comparative study of the effects of Azolla species and strain on availability of N to rice. 9. Comparison of the availability of N from fresh vs dried Azolla. 10. Effects of phosphorus fertilization on growth and N accumulation in Azolla. 11. Nitrogen balance studies in Azolla/rice cropping systems. 12. Increasing fertilizer use efficiency of urea using Azolla cover. 13. Summary and conclusions. 14. References. Appendix.
