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| 1 | The main physical properties of planosol in maize(Zea mays L.) cultivation under different long-term reduced tillage practices in the Baltic region显示文摘The impact of sustainable reduced tillage(RT) on the physical properties of soil is well documented worldwide; however, there is no precise information about the influence of long-term RT or no-till(NT) on the soils at the boundary for grain maize-growing in the semi-humid subarctic climate conditions of the Baltic states, especially on the formation of a hardened upper soil layer(10–15 cm in depth)- 'loosening hardpan'. This study was carried out at the Research Station of Aleksandras Stulginskis University, Lithuania from 2009–2012. The investigations were based on a long-term(since 1988) field experiment. The aim of the investigation was to ascertain the influence of reduced primary tillage on the main soil's physical properties. This study examined soils that were deep ploughing(DP), shallow ploughing(SP), deep cultivation(DC), shallow cultivation(SC), and no-till(NT). Reducing the tillage intensity to NT had no significant effect on the structural soil's composition; however, the stability of the structure of the >1 and >0.25 mm-size fractions was significantly higher in the non-reversibly tilled(DC, SC) and NT plots. The penetration resistance of the DP soils was less after primary tillage and wintering, and became similar to the NT plots at the end of the maize growth season. After primary tillage and wintering, the soil moisture content in the upper soil layer(0–5 cm depth) of the NT plots was 17–49 and 16–18% higher than that in the DP. Long-term reduction of primary tillage up to NT generally had no significant effect on the moisture content and soil bulk density of the 0–10 and 10–20 cm layers. The results showed that long-term RT stabilized the physical quality of soil. Less soil penetration resistance was established in the DP plots compared to both RT and NT, however, indicators of the formation of a uniform 'loosening hardpan' layer were not found. It is summarized that long-term RT or NT systems stabilize, or may increase, the physical quality of soil in crop cultivation with low inter-row coverage potential(maize), and could be applied in semi-humid subarctic climate conditions as a good option to prevent soil degradation. | K?stutis Romaneckas Egidijus ?arauskis Dovil? Avi?ienyt? Sidona Buragien? David Arney | 2015 | Journal of Integrative Agriculture2015，14，7： | 2 |
| 2 | Effect of the twisted alignment on the liquid crystal wave-front corrector显示文摘 | Cao Z L Mu Q Q Dovil L G | 2007 | Liquid Crystals2007，34，10： | 1 |
| 3 | Shifts in microbial community com- position following surface application of dredged river sediments 显示文摘 | DOVILE B EMMANUEL F JOHN J | 2007 | Mi- crob Ecol2007，57，： | 1 |
| 4 | Effect of the twisted alignment on the liquid crystal wave-front corrector 显示文摘 | CAO Z L MU Q Q DOVIL LAIRE G | 2007 | Liquid Crystals2007，34，10： | 1 |
| 5 | Shifts in microbial community composition following surface application of dredged river sediments显示文摘 | Dovile B Emmanuel F Kelly J J | 2009 | Microb Ecol2009，57，： | 1 |
| 6 | 显示文摘 | Dovile Grinkevicit~te Rimantas Kevalas Arimantas Tamasauskas Algimantas Matukevicius Vaidotas Gurskis Rota Liesiene | 2006 | Medicina (Kaunas Lithuania)2006，，4： | 1 |
| 7 | Ground vegetation,forest floor and mineral topsoil in a clear-cutting and reforested Scots pine stands of different ages:a case study显示文摘Scots pine(Pinus sylvestris L.)is a dominant tree species on nutrient-poor sandy soils in the Baltic region’s hemiboreal forests.A final clear-cut in commercial stands is a common practice.However,the maintenance of relatively stable vegetation indices and ecological processes throughout the rotation promote new scientific and social debates.Overall,clear-cuttings disturb forest functions for a certain period,i.e.,phytocenoses with forest-based species composition,biodiversity,and vegetation cover.Soil organic carbon(SOC)and nutrients can also be affected.As key indices,ground vegetation,SOC and main nutrients in the forest floor and in 40-cm topsoil layer were analysed in the clear-cuttings(not reforested)and in reforested 10-,30-,and 101-year-old Scots pine stands in 2020.The results show an increase in species richness at the beginning of stand formation up to 30 years after clear-cutting;species typical of a mature forest occurred relatively quickly post-harvest.The mean mass of forest floor vegetation was negatively related to the richness of ground vegetation species.Forest floor p H consequently decreased with stand age.Higher SOC levels were in the mature stand.In the mineral topsoil layers,total SOC and total nitrogen were in the upper 10-cm layer in the 30-year-old stand.A post-harvest peak in mineral N concentration was observed and other nutrients,especially mobile PO,KO,Caand Mg,increased the clear-cuttings and in the 10-year-old stand compared to the mature stand. | DovilėGustienė Iveta Varnagirytė-Kabašinskienė Vidas Stakėnas | 2022 | Journal of Forestry Research2022，33，4： | 0 |
| 8 | Direct nanoscopic observation of plasma waves in the channel of a graphene field-effect transistor显示文摘Plasma waves play an important role in many solid-state phenomena and devices.They also become significant in electronic device structures as the operation frequencies of these devices increase.A prominent example is field-effect transistors(FETs),that witness increased attention for application as rectifying detectors and mixers of electromagnetic waves at gigahertz and terahertz frequencies,where they exhibit very good sensitivity even high above the cut-off frequency defined by the carrier transit time.Transport theory predicts that the coupling of radiation at THz frequencies into the channel of an antenna-coupled FET leads to the development of a gated plasma wave,collectively involving the charge carriers of both the two-dimensional electron gas and the gate electrode.In this paper,we present the first direct visualization of these waves.Employing graphene FETs containing a buried gate electrode,we utilize near-field THz nanoscopy at room temperature to directly probe the envelope function of the electric field amplitude on the exposed graphene sheet and the neighboring antenna regions.Mapping of the field distribution documents that wave injection is unidirectional from the source side since the oscillating electrical potentials on the gate and drain are equalized by capacitive shunting.The plasma waves,excited at 2 THz,are overdamped,and their decay time lies in the range of 25-70 fs.Despite this short decay time,the decay length is rather long,i.e.,0.3-0.5μm,because of the rather large propagation speed of the plasma waves,which is found to lie in the range of 3.5-7×10^(6)m/s,in good agreement with theory.The propagation speed depends only weakly on the gate voltage swing and is consistent with the theoretically predicted 1/4 power law. | Amin Soltani Frederik Kuschewski Marlene Bonmann Andrey Generalov Andrei Vorobiev Florian Ludwig Matthias M.Wiecha Dovile Cibiraite Frederik Walla Stephan Winnerl Susanne C.Kehr Lukas M.Eng Jan Stake Hartmut G.Roskos | 2020 | Light(Science & Applications)2020，9，1： | 0 |
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