magistrsko delo
Povzetek
Tla so neobnovljiv in ogrožen naravni vir. Namen naloge je bil izboljšanje slabo rodovitnih, močno kislih (pH=3,8) meljasto glinasto ilovnatih (MGI) tal (pesek = 3,3 %; melj 63,1 %; glina = 33,6 %) z naravnima dodatkoma (apnenec 0 4 mm in zeolit 0 2 mm) in industrijskima odpadkoma (siporeks 0 16 mm in mavčne plošče 0 16 mm). Izvedli smo dva pred-poskusa in glavni poskus. Na podlagi rezultatov pred-poskusov, kjer smo preverili vpliv dodatkov na pH in teksturo, smo določili odmerke dodatkov (3, 25 in 50 masnih %) za lončni poskus s kitajskim kapusom (Brassica rapa subsp. pekinensis L.), kontrola so bila izhodiščna tla brez dodatkov. Ob koncu lončnega poskusa smo na vzorcih tal določili teksturo tal in delež grobih delcev ter izmerili pH, električno prevodnost, vsebnost dostopnega fosforja in kalija, kationsko izmenjalno kapaciteto, stopnjo infiltracije, volumsko gostoto tal ter stehtali maso pridelka testne rastline. Kislost tal najbolj učinkovito zmanjša dodatek siporeksa in apnenca, kjer je že pri najmanjšem odmerku (3 %) pH > 5,7. Dodatek v odmerku 3 % ne vpliva na teksturo tal. Pri odmerku 25 % dodatka bolje izboljšamo teksturo z dodatkom mavčnih plošč in siporeksa (meljasta ilovica) kot z dodatkom apnenca in zeolita (glinasta ilovica). V talnih mešanicah z odmerkom 50 % dodatka je tekstura pri vseh obravnavanjih v teksturnem razredu ilovica. Vse vrste dodatkov pozitivno vplivajo na količino pridelka kitajskega kapusa. Dodatki, dodani v odmerku 50 %, pridelek v primerjavi z odmerkom 25 % zmanjšajo, pri dodatku mavčnih plošč se pridelek zmanjša tudi v primerjavi s kontrolo (47,5 % manj). Največji pridelek, 61 % več v primerjavi s kontrolo, smo izmerili pri rastlinah rastočih v tleh s 25 % dodatkom siporeksa. Za praktično uporabo bi priporočali dodatek siporeksa, a za razširjeno uporabo predlagamo še dodatne raziskave.
Ključne besede
kisla tla;težka tla;izboljševalci tal;apnenec;zeolit;gradbeni odpadki;mavčne plošče;siporeks;lončni poskus;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2021 |
Tipologija: |
2.09 - Magistrsko delo |
Organizacija: |
UL BF - Biotehniška fakulteta |
Založnik: |
[M. Pirnat] |
UDK: |
631.41:631.821:628.4.036:549.67:666.973.6:635.34:631.599(043.2) |
COBISS: |
83875331
|
Št. ogledov: |
233 |
Št. prenosov: |
25 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Effect of natural additives and industrial waste on the physical and chemical properties of the soil |
Sekundarni povzetek: |
Soils are a non-renewable and endangered natural resource. The aim of this thesis was to improve a low fertility, highly acidic (pH = 3.8) silty clay loam (SCL) soil (sand = 3.3 %; silt 63.1 %; clay = 33.6 %) with natural amendments (limestone 0 4 mm, zeolite 0-2 mm) and industrial wastes (Siporex 0-16 mm, gypsum board 0 16 mm). We conducted two preliminary and one main experiment. Based on the results of the preliminary experiments, in which we evaluated the effects of the additives on soil pH and texture, we determined the dosage of additives (3, 25 and 50 mass %) for a pot experiment with Chinese cabbage (Brassica rapa subsp. pekinensis L.), using a control soil without additives as a control. At the end of the pot experiment, soil pH, soil texture and gravel content, electrical conductivity, available phosphorus and potassium, cation exchange capacity, infiltration rate and bulk density of the soil were measured, and the yield of the cabbage was determined. Soil acidity was significantly reduced by the addition of Siporex and limestone, and even at the lowest dose (3 %), soil pH was > 5.7. A 3 % dose had no effect on soil texture. At a dose of 25 %, the addition of gypsum board and Siporex (silty loam) improved soil texture better than the addition of limestone and zeolite (clay loam). At a dose of 50 %, the texture of all mixtures with additives was loam. All types of additives had a positive effect on cabbage yield. At 50 % dose, cabbage yield decreased as compared to 25 % dose. When gypsum board was added, the yield was also lower (47.5 %) compared to the control. The highest yield, 61 % higher than the control, was measured in cabbage in soil with 25 % addition of Siporex. For practical use, addition of Siporex would be recommended, but for extended use we suggest further research. |
Sekundarne ključne besede: |
acid soils;heavy soils;soil improvers;limestone;zeolite;construction waste;autoclaved aerated concrete waste;gypsum board waste;pot experiment; |
Vrsta dela (COBISS): |
Magistrsko delo/naloga |
Študijski program: |
0 |
Komentar na gradivo: |
Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo |
Strani: |
XI, 48 f., [19] f. pril. |
ID: |
13790107 |