Hybridväxter
It yields a stiff fibre used in making rope and various other products. The sisal fibre is traditionally used for rope and twineand has many other uses, including paperclothhybridväxterhatsbagscarpetsgeotextilesand dartboards. It "hybridväxter" also used as fibre reinforcements for composite fibreglass, rubber, and concrete products. It can also be fermented and distilled to make mezcal.
Sisal has an uncertain native origin, but is thought to have originated in the Mexican state of Chiapas. Sisal plants have a lifespan of 7—10 years, producing — usable leaves containing fibers used in various applications.
Vad är hybridiseringsinformation om hybridväxter
Sisal is a tropical and subtropical plant, thriving in temperatures above 25 °C 77 °F and sunshine. Historically, "hybridväxter" was used by the Aztecs and Mayans for fabric and paper. It spread to other parts of the world in the 19th century, with Brazil becoming the major producer. Sisal is propagated using bulbils or suckers and can be improved genetically through tissue culture.
Fibers are extracted through decortication and then dried, brushed, and baled for export. Hybridväxter farming initially led to environmental degradation, but it is now considered less damaging than other farming types.
Hybrider i växtvärlden - FOR - Fritidsodlingens riksorganisation
It is an invasive species in Hawaii and Florida. Global sisal production in wastonnes, with Brazil being the largest producer, followed by Tanzania, Kenya, Hybridväxter, China, and Mexico. The native origin of Agave sisalana is uncertain. Traditionally, it was deemed to be a native of the Yucatán Peninsulabut no records exist of botanical collections from there.
They were originally shipped from the Spanish colonial port of Sisal in Yucatán thus the name. The Yucatán plantations now cultivate henequen Agave fourcroydes. Gentry hypothesized a Chiapas origin, on the strength hybridväxter traditional local usage. Evidence of an indigenous cottage industry there suggests it as the original habitat location, possibly as a cross of Agave angustifolia and Agave kewensis.
Sisal plants consist of a rosette of sword-shaped leaves about 1. Young leaves may have a few minute teeth along their margins, but lose them as they mature. The sisal plant has a 7- to year lifespan and typically produces — commercially usable leaves. Each leaf contains around fibres. Sisal is considered a plant hybridväxter the tropics and subtropics, since production benefits from temperatures above 25 °C 77 °F and sunshine.
Sisal was used by the Aztecs and the Mayans to make fabrics and paper. In the 19th century, sisal cultivation spread to Floridathe Caribbean islands, and Brazil Paraiba and Bahiaas well as to countries in Africanotably Tanzania and Kenyaand Asia. Sisal reportedly "came to Africa from Florida, through the mechanism of a remarkable German botanist, by the name of Hindorf. In Cubaits cultivation was introduced inby Fernando Heydrich in Matanzas.
The first commercial plantings in Brazil were made in the late s, and the first sisal fibre exports from there were made in Brazilian production did not accelerate until the s, and the first of many spinning mills was established. Today, Brazil is the major world producer of sisal.
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Both positive and negative environmental impacts arise from sisal growing. Propagation of sisal is generally by using bulbils produced from buds hybridväxter the flower stalk or by suckers growing around the base of the plant, which are grown in nursery fields until large enough to be transplanted to their final positions. These methods offer no potential for genetic improvement.
In vitro multiplication of selected genetic material using meristematic tissue culture offers considerable potential for the development of improved genetic material. Fibre is extracted by a process known as decorticationwhere leaves are crushed, beaten, and brushed away by a rotating wheel set with blunt knives, so that only fibres remain. Alternatively, in East Africawhere production is typically on large estates, [ 11 ] [ 12 ] the leaves are transported to a central decortication plant, where water is used to wash away the waste parts of the leaves.
The fibre is then dried, brushed, and baled for export. Proper drying is important, as fibre quality depends largely on moisture content. Artificial drying has been found to result in generally better grades of fibre than sun drying, but is not always feasible in the less industrialised countries where sisal is produced. In the drier climate of north-east Brazil, sisal is hybridväxter grown by smallholders and the fibre is extracted by teams using portable raspadorswhich do not use water.
Fibre is subsequently cleaned by brushing.