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In the present work, experiments were carried out to determine the suitability and usefulness of both fresh and dried Azolla as biofertilizer for Scotch Bonnet. Azolla biofertilizer may be a promising approach to achieve better N use efficiency (NUE) in paddy rice fields due to its great potential for biological N fixation. A field study was conducted to observe the effect of Azolla on rice yield, N uptake and its residual effect on subsequent wheat crop. Azolladeveloped into a thick.

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It is particularly important to increase the efficiency of nitrogen use and concomitantly to reduce water pollution, by changing strategies of mineral use and by integrating organic fertilizers in the rice production system. The male sporocarp is greenish or reddish and looks like the egg mass of an insect or spider. Most of the species can produce large amounts of deoxyanthocyanins in response to various stresses, [12] including bright sunlight and extremes of temperature, [13] [14] causing the water surface to appear to be covered with an intensely red carpet.

However, the wide ranges of temperature, humidity, and solar radiation in which the fern flourishes suggest the possibility of using Azolla outside these regions [ 4 ]. Articles by Potluri, S. The most popular herbicides, Oxadiazon, Propanil, and Cinosulfuron, were distributed on the fern at the rates usually used in the field. As an additional benefit to its role as a paddy biofertilizer, Azolla spp.

Biofertilizer | The Azolla Foundation

Dry Azolla was spread like a mulch around the base of the plant and used as a split treatment similar to inorganic fertilizer. Biofertulizer treatments Table 3 generally caused stress, with an associated fall in N and C content until death ensued. Azolla is a small water fern that grows on the surface of water bodies or on moist soil.

Although the 4 strains supplied by the IRRI are all recognized as cold resistant, adapted to continental climates or to cold winters, our results indicate that only the Milan strain is likely to be capable of surviving Northern Italian winter conditions.


For the water floating samples, after drying on blotting paper, the biomass was biofertiliezr.

The main areas of cultivation are in the western part of the Po valley in Northern Italy and in the river delta areas, Ebro and Guadalquivir, in Spain.

They form a symbiotic relationship with the cyanobacterium Anabaena azollaewhich fixes atmospheric nitrogengiving the plant access to the essential nutrient. The growth in spring conditions was tested in the following year, in order to assess the potential of Azolla as a biofertilizer at high latitudes in terms of quantity.

As a result, Azolla-Anabaena can fix almost three times more atmospheric nitrogen than legumes. Female sporocarps are much smaller, containing one sporangium and one functional spore. It contains, as endosymbiont, Anabaena azollae Strasburger, a nitrogen fixing cyanobacterium Nostocaceae family.

By using this site, you agree to the Terms of Use and Privacy Policy. Thuiet, Use of Azolla in rice production in Vietnam. Azolla is a heterosporous pteridophyte, with seven species. Biofertilizers are live organisms that continue to provide nutrients while they are living. Mats of mature azolla can also be biocertilizer as a weed-suppressing mulch. We observed high quantities of Nitrogen in the leaves of the Japan and Italy strains; it was probably related to the decrease of its biomass during our test.

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Abstract Scotch Bonnet pepper is a valuable commodity for Jamaica and the Caribbean, both for local consumption and for export biofertilzier of its unique flavor and pungency. Both, weigh and estimation where made after 7 and 15 days. Results from these preliminary tests allow us to form several conclusions regarding the potential use of this fern.

Nitrogen and Carbon analyses were carried out as described before.

The Azolla Cooking and cultivation Project. This fern is used as biofertilizer for rice in millions of hectares in Asia. Finally, in a third separate experiment started on Mar. The Nitrogen and Carbon concentrations in the samples were calculated from the relative area of peaks in the chromatographic traces, using a calibration curve obtained by subjecting a known material, atropine and grapevine leaves, to standard analyses. Plucknett, Azolla as a Green Manure: Water lost by evapo-transpiration was replaced with deionized water every day.


The results obtained from these experiments suggest that the use of Azolla in Po Valley conditions has a potential, suggesting that it could be reasonable, especially for organic farms, to adopt this organic fertilizer which is also capable of reducing weed competition and is resistant to water polluted with one of the most commonly used herbicides. Means and Standard Deviations of Carbon and Nitrogen contents d. During the entire period, the water lost through evapo-transpiration was replenished every day with deionized water and the nutrient content in the solution was continuously controlled and maintained at a constant level.


Contributions from the Museum of. The bars represent the standard deviation.

The extreme of the date intervals is included. We observed high quantities of nitrogen in the leaf of the Japan and Italy strains, which appeared to be related to the decrease of its biomass during our test.

This is an open access article distributed under the Creative Commons Attribution Licensewhich permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. It can remove lead from solutions containing 1— ppm. It was therefore considered necessary to use strains adapted to high latitudes and to local agricultural practices. Herbivore feeding induces accumulation of deoxyanthocyanins and leads to a reduction in the proportion of polyunsaturated fatty acids in the fronds, thus lowering their palatability biofertilizet nutritive value.