Variabilnost gostote tal na njivskih površinah

diplomsko delo

Katarina Vodnik (Author), Marko Zupan (Mentor), Vesna Zupanc (Co-mentor)

Abstract

Z dobro pripravljenim načrtom vzorčenja smo pridobili dodatne informacije o heterogenosti volumske gostote tal na oranih tleh. Izbrali smo osem njiv na območju Celja, kjer je od zadnje obdelave pretekel najmanj en mesec. Talni tip je psevdoglej, na eni njivi delno hipoglej. Vse vzorce tal v posameznem letu smo odvzeli isti dan, pri čemer smo predpostavili, da so bila tla izpostavljena enaki količini padavin. Zato smo predvidevali, da je bila variabilnost meritev odvisna od heterogenosti tal na površini njiv in od izvedbe vzorčenja. Po enem letu smo v manjšem obsegu ponovili vzorčenje na treh njivah in primerjali volumsko gostoto ter vsebnost vode v tleh med leti. Ugotovili smo, da je bila povprečna volumska gostota na površini njiv od 0,80 g/cm3 do 0,98 g/cm3 v letu 2020 in od 0,97 g/cm3 do 1,11 g/cm3 v letu 2021. Koeficienti variacije za volumsko gostoto tal so bili med 0,8 % in 10,2 % leta 2020, leta 2021 pa v manjšem razponu med 3,5 % ter 6,0 %. Koeficienti variacije za trenutno vsebnost vode so bili večji, v letu 2020 so bili od 11,9 % do 20,4 %, v letu 2021 pa od 5,9 % do 10,5 %, pri čemer je bila povprečna količina trenutne vode v tleh večja v letu 2021.

Keywords

fizikalne lastnosti tal;volumska gostota tal;voda v tleh;variabilnost;kmetijska zemljišča;njivske površine;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[K. Vodnik]
UDC:	631.431/.432(043.2)
COBISS:	78865411
Views:	226
Downloads:	41
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Soil bulk density on arable land
Secondary abstract:	With a well-prepared sampling plan, we obtained additional information on the heterogeneity of soil bulk density on arable land. We selected eight fields in the Celje area, where at least 1 month has passed since the last tillage. The soil type is stagnosol, on one field partially gleysol. All soil samples in one year were taken on the same day, and we assumed that the soil was exposed to the same amount of precipitation. Therefore, we assumed that the variability of the measurements depended on the heterogeneity of the soil and the method of sampling. After one year, we repeated the sampling on a smaller scale and compared soil bulk density and gravimetric water content in the soil between years. We found that the average bulk density on the field ranged from 0.80 g/cm3 to 0.98 g/cm3 in 2020 and from 0.97 g/cm3 to 1.11 g/cm3 in 2021. The coefficients of variation for soil bulk density ranged from 0.8 % to 10.2 % in 2020 and in a smaller range from 3.5 % to 6.0 % in 2021. The coefficients of variation for gravimetric water content were higher in 2020, ranging from 11.9 % to 20.4 %, and in 2021, ranging from 5.9 % to 10.5 %, with a higher average gravimetric water content in 2021.
Secondary keywords:	physical properties of soil;soil bulk density;soil water;variability;agricultural land;arable land;
Type (COBISS):	Bachelor thesis/paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Pages:	VIII, 34 f., [9] f. pril.
ID:	13600430