L O A D I N G
blog banner

AZOLLA AS BIOFERTILIZER PDF

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.

Author: Dishakar Mezticage
Country: Ethiopia
Language: English (Spanish)
Genre: Education
Published (Last): 21 November 2016
Pages: 64
PDF File Size: 18.26 Mb
ePub File Size: 9.18 Mb
ISBN: 536-4-37568-590-3
Downloads: 49526
Price: Free* [*Free Regsitration Required]
Uploader: Tak

Temperature and biomass increase were clearly correlated for the Milan and Germany strains whereas the correlation index for the Sweden strain is lower and not significant.

FAO Fisheries biofertilizdr Aquaculture technical paper, It is two millimeters in diameter, and inside are numerous male sporangia. Views Read Edit View history.

Azolla – Wikipedia

Fertilizes add these to the soil and may biofertilizfr organic composed of organic matter or inorganic made of simple, inorganic chemicals or minerals. Systematics and Geography of Plants. Widely cultivated in the Asian regions, Azolla is either incorporated into the soil before rice transplanting or grown as a dual crop along with rice.

Current Issue December biofertiluzer, 53 Male spores microspores are extremely small and are produced inside each microsporangium. At least six extinct species are known from the fossil record:. So Azolla biofertilizer can help to provide a permanent solution in many areas of the world…. The dry Azolla also helped to improve the soil conditions and retained moisture for long periods.

  ANTTI PETAJISTO PDF

Less than half of the nitrogen azoolla by chemical fertilizers are utilized by plants and the remaining nitrogen leaches into the soil and freshwater bodes where causes enormous damage to wildlife. Abstract Azolla is a floating pteridophyte, which contains as endosymbiont the nitrogen-fixing cyanobacterium Anabaena azollae Nostocaceae family. At 3 million tonnes per year, the EU ranks 17th 0.

The plants are small usually only a few cm across and float, but can be very abundant and form large mats. Contributions from the Museum of. Until now, most of the up-to-date research on Azolla in rice has been carried out in tropical or subtropical environments [ 7 — 9 ] and there are only a few reports from temperate ones [ 1011 ]. It is particularly common on farm dams and other still water bodies. It can thus be assumed that Azolla growth would often be faster than that observed in this study.

There was a problem providing the content you requested

In other projects Wikimedia Commons Wikispecies. International Journal of Agronomy. Both, weigh and estimation where made after 7 and 15 biofeertilizer. Finally, it should be noted that this study was performed during a relatively cold spring season.

This was verified in the comparative test in which 5 strains of various origins were compared.

Fertilizer was supplied in three split doses. Biofertilizers are live organisms that continue to provide nutrients while they are living.

This fern is used as biofertilizer for rice in millions of hectares in Asia. Since an individual female spore is considerably larger than a male spore, it is termed a megaspore. We could weigh only floating samples, in Cinosulfuron treatment. From Wikipedia, the free encyclopedia. Plucknett, Azolla as a Green Manure: Dry Azolla was spread like a mulch around the base of the plant and used as a split treatment similar to inorganic fertilizer.

  AFRS 1327 PDF

Biofertilizer | The Azolla Foundation

It is a very common native aquatic plant in Tasmania. Every RGR is calculated on a two-week period, the end of which is reported in -axis. When rice paddies are flooded in the spring, they can be inoculated with Azollawhich then quickly multiplies to cover the water, suppressing weeds.

Long-term effects of urea and green manure on rice yield and nitrogen balance were also verified in temperate conditions [ 6 ] where the biofertlizer use efficiency NUE was particularly low. Table of Contents Alerts.

In other words, the fern should reach a good growth rate during spring, with a high percentage of nitrogen, and should be quite resistant to the most common herbicides used biofertilizfr the rice areas. These organic-rich healthy soils cycle nutrients biologically in a natural way so that they quickly absorb and maintain water after rain, have less evaporation from the surface and are less likely to erode be azollla.

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.