Paj Rwb: 4 hom tseem ceeb tshaj plaws ntawm ib sab

Cov txheej txheem:

Paj Rwb: 4 hom tseem ceeb tshaj plaws ntawm ib sab
Paj Rwb: 4 hom tseem ceeb tshaj plaws ntawm ib sab
Anonim

Paj Rwb - cov nroj tsuag cog qoob loo thaum ub tau siv los ua qhov pib ntawm kev tsim cov ntaub ntawv ntau pua xyoo. Cov paj rwb fibers yog tau los ntawm lawv cov noob plaub hau. Tab sis tsis yog txhua tus paj rwb yog tib yam

paj rwb ntau yam
paj rwb ntau yam

Cov paj rwb hom twg tseem ceeb tshaj rau kab lis kev cai?

Muaj plaub hom paj rwb uas tseem ceeb rau cov qoob loo: Gossypium hirsutum (90% ntawm lub ntiaj teb ntau lawm), Gossypium herbaceum (ob hom tseem ceeb tshaj plaws), Gossypium arboreum (ntev dawb fibers) thiab Gossypium barbadense (siab. - zoo textiles, 8th% ntawm lub ntiaj teb sau). Cov tsiaj no los ntawm ntau qhov chaw hauv ntiaj teb thiab muaj cov yam ntxwv sib txawv.

4 hom ntawm ntau tshaj 50 hom

Tam sim no muaj nyob ib ncig ntawm 50 hom paj rwb uas pom lawv lub tsev nyob rau hauv lub tropics thiab subtropics. Muaj ob qho tib si txhua xyoo thiab perennial qauv. Tab sis tsuas yog 4 hom tseem ceeb rau kab lis kev cai niaj hnub no.

Gossypium hirsutum

Cov hom no, tseem hu ua highland paj rwb lossis upland paj rwb, suav txog 90% ntawm lub ntiaj teb ntau lawm. Yog li ntawd nws yog qhov tseem ceeb tshaj plaws ntawm cov paj rwb fibers. Nws loj hlob thoob plaws ntiaj teb.

Gossypium hirsutum los ntawm America. Cov nroj tsuag loj hlob mus rau qhov siab ntawm 150 thiab 200 cm. Nws cov paj yog dawb mus rau yellowish thiab tig liab thaum lawv ploj mus. Cov fibers ntawm no paj rwb yog 25 mus rau 30 mm ntev. Cov fibers ntev yog xim dawb thiab cov fibers luv yog xim grey.

Gossypium herbaceum

Cov paj rwb thib ob tseem ceeb tshaj plaws yog hu ua Gossypium herbaceum lossis Levante paj rwb. Tej zaum nws yog los ntawm Southwest Asia thiab tam sim no loj hlob nyob rau hauv Tuam Tshoj, Is Nrias teb thiab Pakistan.

Cov hom no feem ntau yog cog raws li ib xyoos. Lawv cov fibers yog luv thiab ntxhib. Qhov no txhais tau hais tias nws raug suav hais tias yog qhov qis dua. Cov nroj tsuag ncav cuag qhov siab txog li 150 cm. Cov paj ntawm nws cov paj yog daj thiab muaj xim liab ntawm lub hauv paus.

Gossypium arboreum

Cov no yog cov khoom ntawm Gossypium arboreum (Ntsuab paj rwb):

  • kuj los ntawm Is Nrias teb thiab Sri Lanka
  • tsob ntoo zoo li tsob ntoo loj hlob
  • loj hlob 2 mus rau 3 m siab
  • perennial
  • yellow paj
  • muab cov fibers ntev dawb thiab luv fibers

Gossypium barbadense

Ntawm no yog cov yam ntxwv ntawm plaub hom, uas yog loj hlob nyob rau hauv Is Nrias teb, Peru thiab Egypt:

  • loj hlob 2 mus rau 3 m siab
  • Shrub or subshrub
  • Paj: lub teeb daj nrog tsaus liab me ntsis
  • ua 8% ntawm lub ntiaj teb sau
  • muaj fibers nrog ntev tshaj 32 mm
  • siv los tsim cov khoom lag luam zoo
  • lwm lub npe: Hiav txwv Island paj rwb, Pima paj rwb

Tip

Txhua plaub hom paj rwb tsis haum rau kev cog qoob loo sab nraum zoov hauv peb lub latitudes. Txawm li cas los xij, hauv chav tsev sov koj tuaj yeem muab nws sim.

Pom zoo: