Kerpely Kálmán DI

Állandó link (URI) ehhez a gyűjteményhez

https://hdl.handle.net/2437/244221

Böngészés

Kerpely Kálmán DI Szerző szerinti böngészés "Csatári, Nándor"

Megjelenítve 1 - 2 (Összesen 2)
  • Nincs kép
    TételKorlátozottan hozzáférhető
    Evaluation of strip tillage systems in maize production in Hungary
    Rátonyi, Tamás; Ragán, Péter; Sulyok, Dénes; Vántus, András; Csatári, Nándor; Nagy, János; Harsányi, Endre; egyetemi oktató, kutató
    Strip tillage is a form of conservation tillage system. It combines the benefits of conventional tillage systems with the soil-protecting advantages of no-tillage. The tillage zone is typically 0.25 to 0.3 m wide and 0.25 to 0.30 m deep. The soil surface between these strips is left undisturbed and the residue from the previous crop remain on the soil surface. The residue-covered area reaches 60-70%. Keeping residue on the surface helps prevent soil structure and reduce water loss from the soil. Strip tillage is most common with crops on 0.76 m row spacing. Maize, sunflower and rapeseed have all been successfully strip tilled in Hungary. Automatic steering with RTK (Real Time Kinematic) is requirement for the strip tillage systems. The objective of this study is to evaluate the effects of conventional (moldboard ploughing) and conservation (spring strip tillage and ripping) tillage systems on soil conditions and on yield of maize. In order to achieve the objective we examined the tillage effects in the polyfactorial long-term field experiment at the trial site of the University of Debrecen (Hajdúság loess plateau, 47° 30’ N, 21° 36’ E, 121 m elevation) in 2015-2017. The experiment was arranged split-split-plot, on the main plots there were three tillage and two irrigation varieties. The investigated tillage treatments were moldboard ploughing (MP) to a depth of 0.3 m, strip tillage (ST) to a depth of 0.3 m and ripping (RP) to a depth of 0.45 m. Long-term field experiment included three maize hybrids in 2015-2017: Armagnac (FAO 490), Loupiac (FAO 380), Sushi (FAO 340). Soil penetration resistance and soil moisture content were measured by a hand operated static cone penetrometer (Penetronik) combined with moisture sensor until 0.65 m depth. The yield of maize in experimental field was determined by plot harvester. Penetration resistance of the soil in strip tillage (ST) treatment inter-rows were significantly higher than is moldboard ploughing (MB) and ripping (RP) treatment, soil moisture content in ST treatment exceeded the moisture content of the upper soil layer of MP and RP treatments. Reduction of the tillage intensity with no use of inversion (ploughing) tillage shows benefit for saving moisture in the soil profile. Maize yield in conservation ST treatment can reach the yields resulted by conventional MB tillage treatment. It can be concluded, that strip tillage can be alternative way of tillage systems beside the conventional moldboard ploughing on chernozem soils under Hungarian conditions of plant production.
  • Nincs kép
    TételKorlátozottan hozzáférhető
    Examining the relationship between SPAD, LAI and NDVI values in a maize long-term experiment
    Ragán, Péter; Harsányi, Endre; Nagy, János; Törő, Ágnes; Vántus, András; Csatári, Nándor; Rátonyi, Tamás; egyetemi oktató, kutató
    In Hungary, the preconditions for the use of precision crop production have undergone enormous development over the last five years. RTK coverage is complete in crop production areas. Consultants are increasingly using the vegetation index maps from Landsat and Sentinel satellite data, but measurements with on-site proximal plant sensors are also needed to exclude the influence of the atmosphere. The aim of our studies was to compare the values measured by proximal plant sensors in the polyfactorial split-split-plot long-term maize field experiment at the trial site of the University of Debrecen (Hajdúság loess plato, N 47.554164, E 21.448111, 112 m elevation) in 2017. The soil type of the experimental site is a lowland calcareous chernozem. During these studies, we used Minolta SPAD502 chlorophyll meter, LI-COR LAI-2000 leaf area index meter and Trimble GreenSeeker NDVI measuring instrument. The measurements were performed in V4; V8 and R1 phenological stages. The statistical analyses were carried out in Rstudio. In V4 phenological phase the correlation between the SPAD values and the NDVI values has been found weak (r = 0.18). The correlation between the SPAD and NDVI values was not significant during the V8 phenological phase. During the phenological phase R1, the correlation between the SPAD and NDVI values was moderate (r = 0.32). The SPAD and LAI values measured in phenophase R1 significantly (P <0.001) influenced the measured NDVI values, the relationship between these values was moderate (r = 0.47), SPAD and LAI values had 22.34% influence on the NDVI values. When in the phenophase of maize R1 the variation coefficients of the NDVI measurements were taken into account, they significantly (P <0.001) affected the measured NDVI values by 43.1%