Video: Vim li cas cov khoom siv organic hauv av tseem ceeb?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Organic teeb meem suav nrog tej nroj tsuag lossis tsiaj txhu khoom uas rov qab mus rau lub av thiab mus los ntawm cov txheej txheem decomposition. Ntxiv nrog rau muab cov as-ham thiab chaw nyob rau cov kab mob nyob hauv lub av , organic teeb meem kuj khi av particles rau hauv aggregates thiab txhim kho cov dej tuav peev xwm ntawm av.
Ntxiv rau qhov no, dab tsi yog qhov feem pua zoo ntawm cov organic teeb meem hauv av?
University of Missouri Extension qhia tias organic teeb meem ua yam tsawg kawg 2 feem pua rau 3 feem pua ntawm av rau loj lawns. Rau lub vaj, loj hlob paj thiab nyob rau hauv toj roob hauv pes, ib tug me ntsis ntau dua feem ntawm organic teeb meem ,,or ib 4 feem pua rau 6 feem pua ntawm av , yog nyiam.
Tsis tas li ntawd, qhov tseem ceeb ntawm cov av yog dab tsi? Tseem ceeb (Functions) ntawm av av muab cov nroj tsuag nrog cov zaub mov tseem ceeb thiab cov as-ham. Av muab cua rau gaseous pauv ntawm cov hauv paus hniav thiab cua. Av tiv thaiv cov nroj tsuag los ntawm kev yaig thiab lwm yam kev puas tsuaj rau lub cev, lom thiab tshuaj lom neeg. Av tuav dej (moisture) thiab tswj kom txaus aeration.
Cov lus nug tseem yog, cov khoom siv organic nkag mus rau hauv av li cas?
Topsoil muaj qhov loj tshaj concentration ntawm organic teeb meem thiab av lub neej, uas ua rau nws nplua nuj nyob rau hauv cov as-ham xav tau los ntawm cov nroj tsuag lub neej kom vam meej. Cov cheeb tsam uas muaj kev hloov pauv siab ntawm cov khoom siv organic yuav muaj ib txheej tob ntawm topsoil. Cov khoom siv organic yog muab tso rau hauv av raws li tsob ntoo thiab tsiaj teeb meem decomposes.
Dab tsi yog qhov tseem ceeb ntawm cov organic teeb meem hauv av?
Feem ntau av organic teeb meem originates los ntawm cov ntaub so ntswg. Nroj tsuag residues muaj 60-90 feem pua ntawm noo noo. Qhov seem qhuav teeb meem muaj carbon (C), oxygen, hydrogen (H) thiab me me ntawm sulfur (S), nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) thiab magnesium (Mg).
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