THE POTENTIAL USE OF AZOLLA AS NITROGEN SOURCE IN RICE PRODUCTION | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 2, Volume 27, Issue 11, November 2002, Pages 7855-7863 PDF (5.84 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2002.255581 | ||
| Authors | ||
| Nagat A. Herzalla; F. T. Mikhaeel; A. A. Amer | ||
| Agricultural Microbiology Department, Soils, Water Res. Environ. lnstitute, Agric., Res. Center, Giza, Egypt. | ||
| Abstract | ||
| A field experiment was conducted at EL-Kalubia governorate at the season (June - October 2001) to study the potential of Azolla application as bio-nitrogen source in comparison with the mineral nitrogen fertilizer as urea as well as their effect on soil organic matter. Results reveal that Azolla significantly increased rice yield (Var. Sakha 102) and soil organic carbon. Increase in yield was 89.5 % (60 kg N fed" as urea), 81.5 % (60 kg N fed" as Azolla1and 92.1 % (30 kg N fed-' as urea + 30 kg N fed" as Azolla). Sixty kg N fed- as Azolla was almost equivalent the application of 60 kg N fed" as urea. The combination of urea and Azolla 30 kg N fee" each resulted in grain yield higher than that obtained with urea or Azolla alone but not significantly different from that obtained with 60 kg N fed" as urea. The increase of rice grain yield was associated with the increase in the number of panicles hill-' and the grain weight. The soil organic carbon increased over the control by 28 % for Azolla treatment, 41.1 % for urea-Azolla combination and did not change with urea. | ||
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