Režim vlažnosti oraničnog sloja tla u uzgoju soje na pokušalištu Maksimir u 2018. godini

master's thesis

• Title (english): Soil moisture regime in soybean cultivation at the Experiment station Maksimir 2018
• Author: Ivan Geršić
• Mentor: Stjepan Husnjak (mentor)
• Committee member: Ivan Šimunić (predsjednik povjerenstva)
• Committee member: Stjepan Husnjak (član povjerenstva)
• Committee member: Ivan Pejić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Soil Science); Zagreb
• Defense date and country: 2019-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Istraživanja dinamike sadržaja trenutačne vlage u tlu u uzgoju ratarskih kultura, koja bi ukazala na potrebu za reguliranjem režima vlažnosti, najčešće nedostaju. Spomenuta istraživanja mogu se provoditi praćenjem režima vlažnosti tla koji predstavlja periodične promjene vlažnosti po dubini profila. Rezultatima takvih istraživanja stječe se uvid o eventualnoj pojavi viška ili manjka oborinske vode u tlu. Osnovni ciljevi ovog rada su utvrditi režim vlažnosti tla na pokušalištu Agronomskog fakulteta Sveučilišta u Zagrebu u vegetacijskom razdoblju (IV. – IX. mjesec) u uvjetima uzgoja soje tijekom 2018. godine, te utvrditi postoji li razlika u režimu vlažnosti tla u dobro i loše razvijenom habitusu soje u istraživanom razdoblju. Pored navedenog, cilj istraživanja bio je odrediti značajke tla i klime na istraživanoj lokaciji, te procijeniti podudarnost režima vlažnosti tla s bilancom oborinske vode u tlu.
Uzorkovanje tla obavljalo se na više kontrolnih mjesta, na dubini 0-30 cm u 3 ponavljanja višekratno tijekom vegetacijskog razdoblja. Sadržaj vlage određivao se gravimetrijskom metodom.
Tlo na istraživanoj lokaciji je eutrično smeđe i obilježava ga ilovasta tekstura, kisela reakcija tla, osrednji kapacitet tla za vodu, mali kapacitet tla za zrak, osrednja volumna gustoća i mala poroznost. Utvrđena je značajna razlika između značajki klime u 2018. godini i višegodišnjih prosječnih vrijednosti. Režim vlažnosti tla nije ukazao na značajnije razlike između dobro i loše razvijenog habitusa soje temeljem čega se može zaključiti da trenutna vlaga tla nije bila uzrok za zaostajanje u rastu. Proračunom bilance oborinske vode u tlu uočen je manjak vode u srpnju i kolovozu, koji se podudara s rezultatima režima vlažnosti tla. Rezultati značajki tla i režima vlažnosti ukazuju na potrebe za uređenjem tla te na potrebu za navodnjavanjem.

Abstract (english)

Studies into the dynamics of instantaneous moisture content in the soil in soybean cultivation, which would point to the necessity to regulate soil moisture regime, is scarce. The mentioned studies may be conducted by monitoring the soil moisture regime that shows periodic changes in moisture with regard to profile depth. The results of such studies give insight into the possible occurrence of excess or lack of precipitation water in the soil. Elementary aims of this paper is to determine the soil moisture regime at the Experiment station Maksimir of the Faculty of Agriculture, University of Zagreb in the vegetation period (April - September) in the conditions of soybean cultivation during 2018, and to determine if there is a difference in soil moisture regime in well and poorly developed habitus soybeans in the study period. In addition, the aim of the research was to determine soil and climate characteristics at the research site and to assess the correspondence of soil moisture regime with the balance of precipitation water in the soil.
Soil sampling was perfomed at several control sites, at a depth of 0-30 cm in 3 repetitions, repeatedly during vegetation. Moisture content was determined by gravimetric method.
The soil at the study location is eutric brown and is characterized by loamy textured, acid soil reaction, average soil water capacity, low air soil capacity, average volume density and low porosity.
It was found a significant difference between the 2018. climate features and perennial averages. The soil moisture regime did not indicate any significant differences between development of well and poorly habitus, so it can be concluded that instantaneous soil moisture was not the cause of lag in growth. The calculation of the precipitation balance in the soil showed a shortage of water in July and August, which matches the results of the soil moisture regime. The results of soil characteristics and soil moisture regime indicate to the need for regulation of soil and the need for irrigation.

• Keywords: režim vlažnosti tla; trenutačna vlaga u tlu; soja; dobro razvijen habitus; loše razvijen habitus
• Keywords (english): soil moisture regime; instantaneous soil moisture; soybean; well developed habitus; poorly developed habitus
• Language: croatian
• URN:NBN: urn:nbn:hr:204:198807
• Study programme: Title: Agroecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka agroekologija (magistar/ magistra inženjer/inženjerka agroekologija)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-11-21 09:09:07