Indeks listne površine kot parameter primarne produkcije koruze (Zea mays L.) ob različni razpoložljivosti vode v okolju

Na namakanih in nenamakanih poljih z različno teksturo tal smo z meritvami indeksa listne površine (LAI) spremljali rast hibridov koruze (Zea mays L.). Poskus je bil izveden v letih 2016 in 2017 na območju Murske Sobote (Prekmurje, SV Slovenija), ki je znano po pogostih sušah, padavin je malo oz. so neredne. Poskus je potekal na koruznih poljih podjetja Panvita d.d. (Rakičan, Slovenija) na distričnih rjavih tleh na nekarbonatnih peščeno prodnatih sedimentih na težkih tleh (T) in lahkih tleh (L). Parcele so bile nenamakana (NE) ali namakana (NA) z namakanlim sistemom pivot (na težkih tleh) in sistemom rolomat (na lahkih tleh). Poskus je potekal na štirih poskusnih parcelah (TNE, TNA, LNE in LNA). V letu 2016 je bilo uporabljenih več hibridov koruze (P0216, P9241 PR31Y43) v letu 2017 pa samo en hibrid (P0216). Od začetka vegetacije junija do konca septembra smo merili indeks listne površine (LAI) s ceptometrom LAI-2200 Plant Canopy Analyzer (LiCor, Lincoln, USA). Skozi sezono smo opravili sedem meritev v nerednih intervalih pri katerem smo sledili protokolu meritev LAI v koruzi. Meritve so pokazale tipično sezonsko LAI krivuljo. Največje vrednosti LAI so bile 5,95. Najmanjše vrednosti so bile na lahkih nenamakanih tleh. To nam pove, da je bila koruza prizadeta zaradi sušnega stresa. V obeh sezonah je koruza na TNA in TNE dosegla podobno vrednost LAI.

• Jezik: Slovenski jezik
• Ključne besede: koruza, Zea mays, LAI, namakanje, sušni stres
• Vrsta gradiva: Diplomsko delo/naloga
• Organizacija: BF - Biotehniška fakulteta
• Leto izida: 2019
• PID: 20.500.12556/RUL-112770
• Datum objave v RUL: 13.11.2019

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Leaf area index as perameter of primary production of maize ( Zea mays) at diferent availability of surrounding water

Izvleček

The growth of maize (Zea mays L.) hybrids were monitored in irrigated and non-irrigated fields with different soil texture by applying leaf area index (LAI) measurements. The experiment was performed in 2016 and 2017 in viccinity of Murska Sobota (Prekmurje, NE Slovenia) in the area with frequent droughts which result from low and irregular precipitation. Research sites were established on the maize fields of a company Panvita d.d. (Rakičan, Slovenia) on dystric brown soils on non-calcalerous sandy gravel sediments of two different textures: fine textured soil (FTS) and coarse textured soil (CTS). Fields were either non-irrigated (NI) or irrigated (I) by a pivot (on the plot with FTS) and a hose reel (on the plot with CTS) system. Alltogether we had four treatments in the experimental design (NI-FTS, I-FTS, NI-CTS, I-CTS). Different maize hybrides were sown at the fileds in 2016 (P0216, P9241 PR31Y43 ), whereas one hybrid (P0216; Pioneer) was used for experiment in 2017. In the period from beginning of June to end of September, we measured the leaf area index (LAI), with a LAI-2200 Plant Canopy Analyzer (LiCor, Lincoln, USA). Throughout the season we made 7 measurements at irregular intervals following the protocol for measuring LAI of row crop with a homogeneous canopy. Measurements revealed typical seasonal LAI curves. LAI reached maximum seasonal values of 5.95. The lowest values were observed in non-irrigated coarse textured soil. This indicates that at these fields the growth of maize was supressed by water stress. In both seasons we detected similar LAI in I-FTS and NI-FTS.

• Ključne besede: maize, Zea mays, LAI, irrigation, drought stress