Muaj cov hlau tshem tawm.Ua kom tshem cov hlau los ntawm cov txiaj ntsig siv hluav taws xob tsuas yog nqus cov khoom hlau.
Nws tau siv dav hauv kev tsim hluav taws xob tua hluav taws biomass thiab pov tseg cov hluav taws xob tsim hluav taws xob kev lag luam.
Muaj hom kev raug tshem tawm, hom pov tseg thiab lwm yam. Tam sim no, qhov teeb meem loj tshaj plaws ntawm daim ntawv thov yog tias feem ntau ntawm cov hlau hauv cov av thiab cov pov tseg hauv tsev tsis yog nyob ib leeg.Ua piv txwv, rau kev hlawv cov biomass, cov hlau tseem ceeb tshaj plaws yog cov rau tes, qhov rooj qhov rooj, qhov rooj xauv, cov hlau dai, thiab lwm yam hauv rooj tog ntoo.
Cov khoom siv hlau no tau khawb lossis lo rau cov khoom ntoo, uas nyuaj rau tshem tawm los ntawm cov hlau tshem tawm.Peb tib yam muaj tseeb rau cov khib nyiab hauv tsev. Muaj ntau cov hlau hlau, cov kav hlau, thiab lwm yam hauv cov thoob khib nyiab. Vim tias qhov sib xyaw ntawm cov khib nyiab hauv tsev yog qhov nyuaj thiab cov dej noo ntau heev, cov thoob khib nyiab tau txuas nrog cov hlau, tshwj xeeb yog cov xov hlau, thiab hnab yas thiab lwm yam khoom raug kaw nruj nreem, uas nyuaj rau tshem tawm.
