ABOUT AZZOLA CULTIVATION
WHAT IS AZZOLA-Azzola is an free floting aquartic fern which dosent have any branc and naturally available on moist soil,ditches marshy ponds. They are extremely reduced in form and specialized, looking nothing like other typical ferns but more resembling duckweed or some mosses..Azolla reproduces sexually, and asexually by splitting.In
addition to its traditional cultivation as a bio-fertilizer for wetland
paddy (due to its ability to fix nitrogen), azolla is finding
increasing use for sustainable production of livestock feed. Azolla
is rich in proteins, essential amino acids, vitamins and minerals.
describe feeding azolla to, chickens and egg production of layers, as
compared to conventional feed.
HOW TO MAKE BED FOR AZZOLA-Generally the dept of azzola bed must be 1.25 to 1feet and the lenght 20feet.we can make the azzola bed on our own wish.
REPRODUCTION
Scanning electron micrograph of a megaspore of the genus Azolla with adhering massulae from postglacial sediments of Laguna El Junco, Galápagos Island of San Cristóbal.
Transmission electron micrograph of a megaspore of the genus Azolla from postglacial sediments of Laguna El Junco, Galápagos Island of San Cristobal.
Like all ferns, sexual reproduction leads to spore formation, but Azolla sets itself apart from other members of its group by producing two kinds. During the summer months, numerous spherical structures called sporocarps form on the undersides of the branches. The male sporocarp is greenish or reddish and looks like the egg mass of an insect or spider. It is two millimeters in diameter, and inside are numerous male sporangia. Male spores (microspores) are extremely small and are produced inside each microsporangium. Curiously, microspores tend to adhere in clumps called massulae.
Female sporocarps are much smaller, containing one sporangium and one functional spore. Since an individual female spore is considerably larger than a male spore, it is termed a megaspore.
Azolla has microscopic male and female gametophytes that develop inside the male and female spores. The female gametophyte protrudes from the megaspore and bears a small number of archegonia, each containing a single egg. The microspore forms a male gametophyte with a single antheridium which produces eight swimming sperm.The barbed glochidia on the male spore clusters cause them to cling to the female megaspores, thus facilitating fertilization.
HUMAN USE
Food
In addition to its traditional cultivation as a bio-fertilizer for wetland paddy (due to its ability to fix nitrogen), azolla is finding increasing use for sustainable production of livestock feed. Azolla is rich in proteins, essential amino acids, vitamins and minerals. describe feeding azolla to, chickens and egg production of layers, as compared to conventional feed. One FAO study describes how azolla integrates into a tropical biomass agricultural system, reducing the need for inputs.Azolla has also been suggested as a food stuff for human consumption. However, no long term studies of the healthiness of eating Azolla have been made on humans and Azolla may contain BMAA, a substance that is a possible cause of neurodegenerative diseases.SPECIES:-
Azolla caroliniana
Azolla filiculoides
Azolla mexicana
Azolla microphylla
Azolla pinnata
Azolla rubra
SUBSPECIES:-
Azolla pinnata subsp. africana
Azolla pinnata subsp. asiatica
Azolla pinnata subsp. pinnata
Azolla also has several fossil species which date back approximately 70 million years to the Late Cretaceous. These include Azolla arctica which were deposited 50 million years ago during the Eocene Arctic Azolla Event.
EXTERNAL LINKS TO KNOW MORE ABOUT AZZOLA:-
Comments
Post a Comment