Time filter

Source Type

Little information exists on the pattern of nitrogen (N) uptake, remobilization and N use efficacy in spring triticale. The study was aimed to determine the effect of N rates and application regimes on the yield, yield components, as well as to ascertain optimal N fertilization regime for spring triticale. The study was based on the experiment carried out at the Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry in Central Lithuania on an Endocalcari-Endohypogleyic Cambisol (CMg-n-w-can) during the period 2008-2011. The data were analysed using ANOVA method. Nitrogen was applied as basic fertilization (N60-180) shortly before sowing, and N90, N150 rates were split in two or three applications. Grain yield, yield components (ears m-2, grains ear-1, productivity g ear-1, and thousand grain weight), grain protein content and nitrogen use efficiency (NUE) were investigated. The analysis of variance of the data averaged over the four experimental years showed that experimental year significantly (P ≤ 0.01, P ≤ 0.05) influenced all the tested parameters on both basic fertilization backgrounds and N splitting treatments. The influence of N rate on the investigated parameters was significant (P ≤ 0.01, P ≤ 0.05) on basic fertilization backgrounds almost in all the cases; however, the influence of N splitting regime on the yield and yield components was insignificant. N splitting significantly (P ≤ 0.01) influenced protein content and all indices of NUE. Fertilization increased the grain yield by 35.7%, compared with the unfertilized control treatment. The N90-120 rate was found to be economically and ecologically optimal for spring triticale. It resulted in the highest (4.81-4.92 Mg ha-1) grain yield.

Olle M.,Jogeva Plant Breeding Institute | Virsile A.,Lithuanian Research Center for Agriculture and Forestry
Agricultural and Food Science | Year: 2013

The aim of this study is to present the light emitting diode (LED) technology for greenhouse plant lighting and to give an overview about LED light effects on photosynthetic indices, growth, yield and nutritional value in green vegetables and tomato, cucumber, sweet pepper transplants. The sole LED lighting, applied in closed growth chambers, as well as combinations of LED wavelengths with conventional light sources, fluorescent and high pressure sodium lamp light, and natural illumination in greenhouses are overviewed. Red and blue light are basal in the lighting spectra for green vegetables and tomato, cucumber, and pepper transplants; far red light, important for photomorphogenetic processes in plants also results in growth promotion. However, theoretically unprofitable spectral parts as green or yellow also have significant physiological effects on investigated plants. Presented results disclose the variability of light spectral effects on different plant species and different physiological indices.

Jarasiunas G.,Lithuanian Research Center for Agriculture and Forestry
Journal of Central European Agriculture | Year: 2016

The aim of this research was to evaluate and describe agricultural land handicapped by steep slope and to assess agricultural experts’ attitude towards impact of terrain factor on the generic farming activity. This paper analyses differences and similarities between Lithuanian rural elderships affected by steep slope constraint (i.e. ≥ 7° (15%) slope gradient) with the subsequent evaluation in selected agronomical variables. In total 514 rural elderships were classified into five groups by percentage of agricultural land with steep slope. The assessment of agricultural variables by steep slope groups revealed that the best developed are elderships (60.12%) falling into Group I, where mean value of area under steep slope was 0.32%. Very unfavourable conditions, especially for intensive farming, were identified in Group V (7.59% elderships), where the topographical character has a dominantly hilly terrain. Agricultural experts’ (scientists) for survey was used assessing the respondents attitude (6-point Likert Scale) towards terrain impact on the items related to generic farming sector, i.e., “Agricultural development”, “Farming systems use”, “Land utilization possibilities” and “Soil erosion”. The surveyed experts considered that terrain is a factor influencing land-use decisions and the item “Land utilization possibilities” has assumed the highest mean score (3.77). Therefore it should be a good overview of agricultural land with steep slope, as one of the most important natural agri-environmental constraint affecting generic farming possibilities in Lithuania. © 2016, University of Zagreb - Faculty of Agriculture. All rights reserved.

The present study was aimed to examine the impact of nitrogen and sulphur fertilisation on spring oilseed rape cv. 'Maskot' quality parameters. The experiments were carried out at the Lithuanian Institute of Agriculture in Dotnuva during 2003-2005 on a sod gleyic, Endocalcari-Epihypogleyic Cambisol (CMgp-w-can), light loam with moderate mineral nitrogen and low mobile sulphur contents. An increase in nitrogen application had a positive effect on the concentration of nitrogen in the aboveground biomass during the growing season (at the stages of stem elongation and pod development), and at complete maturity - in seeds and straw. In turn, sulphur fertilisation significantly increased sulphur concentration at the above-mentioned stages; however, at complete maturity it had an obvious positive effect on total sulphur concentration in seeds and straw in 2003, only. Despite high sulphur rates used (to 40 kg ha-1), the N:S ratio (an indicator of sulphur deficiency) revealed the shortage of sulphur in seeds in 2004 and 2005. The highest crude protein content was observed in a warmer and drier year 2003. The 150 kg ha-1 nitrogen rate was optimal for crude protein content in rape seeds, while in 2005 it was 90 kg ha-1. Crude fat content in seeds (2004 and 2005) decreased with increasing nitrogen application up to 150 kg ha-1 and was not influenced by different growing conditions during the experimental years. The application of nitrogen up to 150 kg ha-1 and sulphur up to 40 kg ha-1 tended to increase glucosinolate content. The highest glucosinolate content was obtained in 2005, more favourable for glucosinolate accumulation. Besides, glucosinolate content was positively influenced by N × S interaction in some cases.

Kadzienz G.,Lithuanian Research Center for Agriculture and Forestry | Munkholm L.J.,University of Aarhus | Mutegi J.K.,University of Aarhus
Geoderma | Year: 2011

Many studies have reported impeded root growth in topsoil under reduced tillage or direct drilling, but few have quantified the effects on the least limiting water range for root growth. This study explored the effects of tillage intensity on critical soil physical conditions for root growth in the topsoil. Samples were taken from a 7-year tillage experiment on a Danish sandy loam at Foulum, Denmark (56°30' N, 9°35' E) in 2008. The main crop was spring barley followed by either dyer's woad (Isatis tinctoria L.) or fodder radish (Raphanus sativus L.) cover crops as subtreatment. The tillage treatments were direct drilling (D), harrowing 8-10. cm (H), and ploughing (P) to 20. cm depth. A chisel coulter drill was used in the H and D treatments and a traditional seed drill in the P treatment. Undisturbed soil cores were collected in November 2008 at soil field moisture capacity from the 4-8 and 12-16. cm depths.We estimated the critical aeration limit from either 10% air-filled porosity (εa) or relative gas diffusivity (D/D0) of 0.005 or 0.02 and found a difference between the two methods. The critical limit of soil aeration was best assessed by measuring gas diffusivity directly. Root growth was limited by a high penetration resistance in the D and H soils (below tillage depth). Poor soil aeration did not appear to be a significant limiting factor for root growth for this sandy loam soil, irrespective of tillage treatment. The soil had a high macroporosity and D/D0 exceeded 0.02 at field capacity. Fodder radish resulted in more macropores, higher gas diffusivity and lower pore tortuosity compared to dyer's woad. This was especially important for the H treatment where compaction was a significant problem at the lower depths of the arable layer (10-20cm depth). Our results suggest that fodder radish could be a promising tool in the amelioration of soil compaction. © 2011 Elsevier B.V.

Discover hidden collaborations