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.
|Published (Last):||28 October 2006|
|PDF File Size:||2.93 Mb|
|ePub File Size:||10.96 Mb|
|Price:||Free* [*Free Regsitration Required]|
Nitrogen and Carbon analyses were carried out as described before.
Fresh aaolla was evaluated every seven days and weight determinations were made after drying Azolla biomass with blotting paper. This strain alone was used for the second and third experiments.
However, after this intermediate phase, Cinosulfuron caused a progressive deterioration leading to the death of the fern. The female gametophyte protrudes from the megaspore and bears a small number of archegoniaeach containing a single egg. It is also important to remember that agriculture can play a significant role in the reduction of greenhouse gases, particularly for CO 2 if the rice farmers can increase the soil stable organic matter and treat biofertulizer soils as powerful carbon sinks.
Is there a way out of this trap we have made for ourselves? Abstract Azolla is a floating pteridophyte, which contains as endosymbiont the nitrogen-fixing cyanobacterium Anabaena azollae Nostocaceae family.
Water lost by evapo-transpiration was replaced with deionized water every day. The dry Azolla also helped to improve the soil conditions and retained moisture for long periods.
In all cases, growth proceeded without reaching a surface-limiting condition, where an increase of thickness, due to the leaf growth, could have changed growth dynamics. User Name Password Sign In.
America’s Wetland Resource Center. Subscribe to Table of Contents Alerts. Contributions from the Museum of.
Azolla is a heterosporous pteridophyte, with seven species. The Azolla Cooking and cultivation Project. The male sporocarp is greenish or reddish and looks like the biofertilizsr mass of an insect or spider.
International Journal of Agronomy
It is xs tolerant of salinity; normal plants can’t survive in greater than The calculation of growth rate allowed us biofertjlizer determine the amount of inoculum required to allow complete coverage of flooded paddies by the time of rice sowing.
For the humid soil sample, biomass variations were estimated from measurements of total leaf surface area. Azolla floats on the surface of water by means of numerous, small, closely overlapping scale-like leaves, with their roots hanging in the water.
Related Content Load related web page information. Moreover, to use the fern as a biofertilizer in conventional farming, not just in organic farming, some resistance to the most popular herbicides is required. Herbicide treatment, Analysis of Nitrogen and Carbon, expressed as d.
A progressive decrease of leaf dimensions was registered in all strains, associated with accumulation of anthocyanins. Curiously, microspores tend to adhere in clumps called massulae.
Indexed in Web of Science. This was verified in the comparative test in which 5 strains of various origins were compared. Although the 4 strains supplied by the IRRI are all recognized as cold biofetrilizer, adapted to continental climates or to cold winters, biofertilizzer results indicate that only the Milan strain is likely to be capable of surviving Northern Italian winter conditions. Azolla filiculoides strains considered resistant to low temperatures were acquired from the Biofertilizer Germplasm Collections BGC of N 2 fixing organisms of the I.
Azolla – Wikipedia
The plant grows in a thick viofertilizer on the bkofertilizer of the water, making it more difficult for the larvae to reach the surface to breathe, effectively zzolla the larvae.
Treatments with the commonly used herbicides Propanil, Oxadiazon, and Cinosulfuron caused the death of the fern. Organic fertilizers are dead organic matter of animal, plant and microbial origin that provides plant nutrients. We could weigh only floating samples, in Cinosulfuron treatment.
Retrieved February 19, 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 lost. Most of the species can produce large amounts of deoxyanthocyanins in response to various stresses,  including bright sunlight and extremes of temperature,   causing the water surface to appear to be covered with an intensely red carpet.
A study of Arctic paleoclimatology reported that Azolla may have had a significant role in reversing an increase in greenhouse effect that occurred 55 million years ago that caused the region around the north pole to turn into a hot, tropical environment.
Experiment started on Dec. Azolla is a floating pteridophyte, which contains as endosymbiont the nitrogen-fixing cyanobacterium Anabaena azollae Nostocaceae family. The plants are typically red, and have very small water repellent leaves. Studies describe feeding biofertliizer to dairy cattle, pigs, ducks, and chickens, with reported increases in milk production, weight of broiler chickens and egg production of layers, as compared to conventional feed. Thuiet, Use of Azolla in rice production in Vietnam.