Tag Archives: sowing time

xxx I. Plūduma-Pauniņa, Z. Gaile and G. Bimšteine
Sowing time effect on yield and quality of field beans in a changing meteorological situation in the Baltic region
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Sowing time effect on yield and quality of field beans in a changing meteorological situation in the Baltic region

I. Plūduma-Pauniņa¹²*, Z. Gaile¹ and G. Bimšteine¹

¹Latvia University of Life Sciences and Technologies (LLU), Faculty of Agriculture, Institute of Soil and Plant Science, Liela street 2, Jelgava LV–3001, Latvia
²LLU, Faculty of Agriculture, Research and Study Farm “Pēterlauki”, Platone parish, LV–3021, Latvia

Abstract:

As field beans (Vicia faba L.) need a lot of moisture to germinate, growers believe that they should be sown as early as possible in the spring. Field trial was carried out at the LLU RSF “Pēterlauki”, from 2018 to 2020. Following factors were researched: A) sowing time (early, medium and late), B) variety (‘Laura’, ‘Boxer’, ‘Isabell’), C) sowing rate (30, 40, 50 germinable seeds m-2), D) fungicide application (without and with application of fungicide at the GS 61-65). Meteorological conditions during the study had the greatest impact on the results as they were contrasting. Adverse meteorological conditions for field bean growing were observed in 2018 and in spring and early summer of 2019. The best year for bean yield formation was 2020, when temperature and precipitation was moderate. The highest average three year been yield was obtained sowing beans at the medium sowing time, however, equivalent yield was obtained sowing beans also in early sowing time. Fungicide application increased average three year yield significantly (p = 0.007) and independently of the sowing time. Influence of variety and sowing rate on average three year yield was insignificant, and it was not proved that any variety or sowing rate could be more suitable in a specific sowing time. Average three-year values of crude protein content, thousand seed weight and volume weight were affected by sowing time significantly (p < 0.001). Trial year, variety and fungicide application also affected all quality parameters significantly (p < 0.05), but the effect of sowing rate was insignificant (p > 0.05).

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347-354 R. Kosteckas, V. Liakas, A. Šiuliauskas, V. Rauckis,E. Liakienė, E. Jakienė
Effect of Pinolen on winter rape seed losses in relation to maturity
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Effect of Pinolen on winter rape seed losses in relation to maturity

R. Kosteckas², V. Liakas¹, A. Šiuliauskas¹, V. Rauckis²,E. Liakienė¹, E. Jakienė¹

¹Lithuanian University of Agriculture, Studentų str. 11, Akademija, Kaunas distr., LT-53361,Lithuania; e-mail: vytautas.liakas@gmail.com
²UAB “Kustodija”, Laisvės pr. 117A, Vilnius, LT-06118, Lithuania;e-mail: raimondas@kustodija.lt

Abstract:

Research objective: To determine the effect of Pinolen (Aventrol) and carbamate solutions on winter rape seed yields under Lithuanian conditions. Research place and time: Bariunai agricultural holding, Joniskis region., Lithuania. Trials were carried out in 2007–2008. Trial field soil: JDg8-K(LVg-p-w-cc) Calc(ar)i-Epihypogleyic Luvisols. Research methods: Field trials, and biometric analysis of rape plants. Research data evaluation: Two-year research data confirmed the hypothesis of the authors that, in the winter rape crop, leaf-spray fertilization with Pinolen (0.5–1.0 l ha-1) solutions three weeks before crop maturity results in the formation of an elastic capsule around the siliques and prevents them from splitting open with consequent loss of seed. Pinolen efficacy is greater in disease or pest damaged crops, and crops harvested late. From the economic and labour planning points of view, leaf-spray fertilization of winter rape with Pinolen should be combined with additional leaf-spray fertilization with carbamate solutions (20 kg ha-1). Leaf-spray fertilization of winter rape with Pinolen (1.0 l ha-1) + carbamate (20 kg ha-1) solutions resulted in seed yield increases: in the 2007 trial by 0.64 and in the 2008 trial by 0.320 t ha-1. Of the total seed augmentation, the Pinolen effect accounted for 33.3%. The protective efficacy of the capsule starts to decrease five weeks after leaf spray fertilization of the crop with these solutions. Key words: winter rape (Brassica napus var. oleifera), Pinolen, Carbamate, seed loss, seed productivityINTRODUCTION

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436-443 B. Petkeviciene
The effects of climate factors on sugar beet early sowing timing
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The effects of climate factors on sugar beet early sowing timing

B. Petkeviciene

Rumokai Research Station of the Lithuanian Institute of Agriculturepost LT-4293 Zalioji, district Vilkaviskis, Lithuanian;tel: +370-342-49422, +370-342-49435; e-mail: rumokai@post.omnitel.net

Abstract:

Important environmental variables that affect determination of sugar beet growing processes are temperature, precipitation and soil moisture. The optimal time for sugar beet sowing was determined in the variety testing trial conducted at the Rumokai Research Station of the Lithuanian Institute of Agriculture during the period 2000–2006. This time was found to be when the mean daily temperature for three subsequent days reached the limit of base air temperatures (> 10ºC). The sowing time was found to strongly correlate (r = 0.9*) with the amount of precipitation and accumulated base temperatures (> 5ºC) in March and May. The potential of sugar beet root biomass and white sugar correlated moderately strongly with the duration of the growing season (r = 0.55 and 0.62) and sowing time (r = −0.64 and −0.70).Data from the sowing timing trial averaged over the period 2000–2004 suggests that in thecase of early sowing the soil moisture at sowing depth was 16.3. With the delay of sowing soil moisture decreased. At early sowing the stand density was by 3.3  lower compared with the average (99,900 plants ha-1). One week’s delay in sowing reduced roots by 4.7 t ha-1 and white sugar 0.9 t ha-1 and increased alpha amino nitrogen content in roots by 2.58 mg 100g-1.

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253–264 A. Svirskis
Investigation of amaranth cultivation and utilisation in Lithuania
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Investigation of amaranth cultivation and utilisation in Lithuania

A. Svirskis

Šiauliai University, P. Višinskio 25, Šiauliai, Lithuania; e-mail: selekcentras@lzi.lt

Abstract:

Studies of amaranth (Amaranthus spp.) collections have been carried out at the Lithuanian Institute of Agriculture since 1978. During the period of 1998–2001, 13 varieties and populations of amaranth and some parameters of amaranth growing technology (sowing time, seed rate, row spacing, etc.) were investigated. The amaranth was grown in the six-course perennial grass breeding crop rotation after ploughed-in first year clover, sown after black fallow without additional fertilising and pesticides.
Preliminary amaranth growing technology was elaborated. The highest yield was produced when amaranth had been sown in the middle of May, at a seed rate of 2–4 kg ha-1, with row spacings of 50 cm and thrashed dry after severe frosts (-3…-5°C). The technology needs further improvement, and it is especially necessary to investigate fertilisation of amaranth in ecological and conventional farming systems.
Three amaranth varieties – ‘Raudonukai’, ‘Geltonukai’ and ‘Rausvukai’ – were registered in Lithuania in 2001. It is necessary to continue selection of amaranth species and varieties best suited for local conditions and investigate possibilities for use of amaranth green material and seed for food, feed, and energy production.

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