| Titles |
|
English :
|
Azolla and cyanobacteria as nitrogen source substitute mineral nitrogen in rice cultivation
|
|
Arabic :
|
الازولا والسيانو بكتيريا كمصدر نيتروجينى بديل للنيتروجين المعدنى في زراعة الأرز
|
|
| Abstract |
A greenhouse experiment was carried out to study the effect of Azolla and /or cyanobacteria inoculation each alone or in combination with different levels of chemical nitrogen fertilizer (urea) on rice growth and yield production. The slight higher rice yield increases observed in cyanobacteria (CSBI) inoculated pots were not significantly different from corresponding non- inoculated treatments. Applying 60 kg N fed-1 as urea and/ or as Azolla had similar effect on grain yield. The highest grain yield was obtained with the combination of 30 kg N fed-1 as urea and 30 kg N fed-1 as Azolla. This value was not significantly different from those obtained with 60 kg N fed-1 as urea but was significantly higher than that obtained by the use of 60 kg N fed-1 as Azolla. Azolla and / or cyanobacteria did not affect the rice harvest index. The nitrogen use efficiency decreased with increasing nitrogen level. The highest plant nitrogen uptake was recorded when Azolla mixed with urea at 30 kg N fed-1 each.
Results show that Azolla application alone or in combination with urea are more beneficial to rice than inoculation with cyanobacteria. Azolla also increased significantly the soil organic carbon content
|
| Publication year |
2006
|
| Availability location |
معهد بحوث الأراضى والمياه والبيئة – 9 ش جامعة القاهرة – الجيزة
|
| Availability number |
|
| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
|
| Author(s) from ARC |
|
| Agris Categories |
Crop husbandryPlant genetics and breedingPlant physiology - NutritionPlant propagation
|
AGROVOC
TERMS |
Azolla.
Cyanobacteria.
Mineral nutrients.
Nitrogen fertilizers.
Rice.
Rice fields.
|
| Publication Type |
Journal
|