Tam sim no muaj cov tsiaj qus thiab cog qoob loo hauv ntiaj teb. Lawv qhov sib txawv tseem ceeb nyob hauv qhov tseeb tias cov neeg kab lis kev cai loj hlob lub hom phiaj, tso saib ntau yam hauv hom.
Txawm li cas los xij, qhov no yog qhov kev faib tawm tsis raug ntawm cov neeg sawv cev.
Kev lees txais kev faib tawm ntawm cov tsiaj qus thiab cog qoob loo
Cov kws tshawb fawb faib tag nrho cov nroj tsuag ua ob lub nceeg vaj: qis dua thiab siab dua. Thawj pab pawg muaj plaub ntu: xim av, ntsuab, liab thiab diatoms. Cov neeg siab dua muaj xws li cov chaw haujlwm: moss-zoo li, horsetail-zoo li, lycopsform, psilot-zoo li, fern-zoo li, gymnosperms thiab angiosperms. Thawj tsib pawg ntawm cov nroj tsuag rov tsim dua los ntawm spores, thiab zaum kawg ob los ntawm cov noob. Gymnosperms txawv ntawm angiosperms nyob rau hauv uas lawv muaj paj, yog li cov nroj tsuag ntawm no department kuj hu ua flowering nroj tsuag. Feem ntau ntawm lub ntiaj teb cov nroj tsuag cultivated yog nyob rau hauv angiosperm division. Feem ntau, flowering thiab gymnosperms yog nyob deb ntawm ntau pawg ntawm cov nroj tsuag.
Ntau yam ntawm angiosperms
Ntsuab thiab cultivated nroj tsuag propagated los ntawm noob muaj ntau haiv neeg thiabntau.
Cia peb xub saib qhov kev faib tawm ntawm cov neeg sawv cev ntawm cov nroj tsuag no. Yog li, cov nroj tsuag qus thiab cog qoob loo uas koom nrog lub tuam tsev paj tau muab faib ua ob chav kawm nyob ntawm cov qauv ntawm cov noob: monocotyledonous thiab dicotyledonous. Monocotyledons suav nrog cov tsev neeg xws li cereals thiab lilies. Xws li cov nroj tsuag feem ntau yog cog. Dicotyledons suav nrog tsev neeg xws li birch, willow, nightshade, cruciferous, legume, Compositae, Rosaceae. Ntawm lawv, kuj muaj ntau yam qoob loo uas noob neej.
Ntau yam ntawm gymnosperms
Cov nroj tsuag uas muaj nyob hauv gymnosperms tuaj yeem muab faib ua plaub chav kawm: conifers, cycads, gnetos thiab ginkgos. Cov no yog hom tsiaj qus.
Nyob rau hauv tag nrho cov tsev neeg teev saum toj no, genera thiab hom yog txawv.
Lwm cov kev faib cov nroj tsuag
Nyob ntawm daim ntawv lub neej, cov tsiaj qus thiab cog qoob loo tuaj yeem muab faib ua yim pawg:
- Nyob. Cov no yog cov nroj tsuag perennial nrog lub cev muaj zog ntawm 2 meters hauv qhov siab.
- Subshrubs. Cov no yog cov nroj tsuag perennial nrog woody qis qhov chaw ntawm stems thiab herbaceous qaum sawv daws yuav. Lawv qhov siab yog los ntawm 1 meter. Qhov no tsis yog ib pawg loj ntawm cov nroj tsuag. Nws tsuas yog nyob xwbQee hom ephedra, astragalus thiab lwm yam.
- Txiv kab ntxwv. Lawv muaj qhov zoo ib yam li cov ntoo, tab sis nrog qhov siab qis - tsis siab tshaj 0.5 meters.
- Semishrubs. Zoo ib yam li shrubs, tab sis muaj kwv yees li qhov siab tib yam li cov nroj tsuag. Subshrubs suav nrog, piv txwv li, qee hom wormwood.
- Succulents. Perennial nroj tsuag nrog succulent, fleshy stems thiab nplooj uas muaj cov dej seem. Cov pab pawg no suav nrog ntau cov paj hauv tsev: aloe, Kalanchoe, cacti, thiab lwm yam.
- Lianas. Lawv xav tau kev txhawb nqa los tuav lawv txoj haujlwm. Lawv muab faib ua curly thiab nce toj.
- tshuaj ntsuab. Nroj tsuag nrog succulent ntsuab tsis-woody tua. Ntau cov nroj tsuag cog thiab cog hauv tsev muaj daim ntawv no lub neej.
- Tseem muaj cov kab mob ua neej xws li kab mob cab thiab epiphytes. Lawv zoo ib yam li lawv nyob rau lwm cov nroj tsuag. Txawm li cas los xij, qhov sib txawv ntawm ob yog cov cab cab noj rau lawv "tus tswv", thaum epiphytes tsis ua rau muaj kev phom sij rau cov nroj tsuag uas lawv nyob.
Nyob zoo ib tsoom phooj ywg. Perennial cov neeg sawv cev ntawm cov nroj tsuag nrog woody stems, tab sis tsis muaj ib tug pronounced pob tw. Ceg ntawm cov nroj tsuag no pib los ntawm cov av nws tus kheej.
Cov nroj tsuag qus thiab cog qoob loo, piv txwv uas tuaj yeem pom hauv cov duab, kuj tuaj yeem muab faib ua pawg nyob ntawm lawv lub neej. Yog li, muaj txhua xyoo, biennial thiab perennial nroj tsuag. Txhua xyoo thiab biennials feem ntau yog cov nroj tsuag herbaceous, thaum perennials tuaj yeem yog cov ntoo, subshrubs, ntoo, thiab lwm yam.
Ntsuab thiab cog qoob loo: piv txwv
Cia peb xav txogcultivated thiab qus nroj tsuag uas yog siv los ntawm tib neeg nyob rau hauv ntau yam teb.
Cov lus hauv qab no qhia lawv.
| Kev loj hlob | pab pawg | Examples |
| Vim zoov | drug | |
| rau cov ntaub ntawv thiab ntawv thiab rooj tog kev lag luam | ||
| rau noj | ||
| Cultural | decorative | |
| taum | ||
| cereals | ||
| sugar-bearing | sugar beets | |
| starchy | qos yaj ywm | |
| fibrous | ||
| oilseeds | sunflower | |
| fruits | ||
| zaub | lws suav, dib, zaub qhwv, radish, radish, turip | |
| kev txhawb nqa | kas fes, tshuaj yej, luam yeeb | |
| pab |
Tam sim no kojkoj paub tias cov neeg sawv cev ntawm cov kab lis kev cai thiab cov tsiaj qus loj hlob li cas thiab cov pab pawg twg lawv tau muab faib ua.
