Tag Archives: fertilizers

43-49 E. Jariene, H. Danilcenko, J. Kulaitienė and M. Gajewski
Effect of fertilizers on oil pumpkin seeds crude fat, fibre and protein quantity
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Effect of fertilizers on oil pumpkin seeds crude fat, fibre and protein quantity

E. Jariene¹, H. Danilcenko¹, J. Kulaitienė¹ and M. Gajewski²

¹Lithuanian Agriculture University, LT-4324 Kaunas, Studentų 11;e-mail: hd@lzuu.lt,
²Warsaw Agricultural University, Warszawa, Nowoursynowska 166

Abstract:

An investigation of the chemical composition of seeds of various oil bearing pumpkin cultivars grown with different forms of fertilizers was conducted in a certified organic field of the Lithuanian University of Agriculture; three oil pumpkin cultivars (Cucurbita pepo var. styriaca L.) – ‘Miranda’, ‘Golosemiannaja’ and ‘Herakles’ were grown in 2004–2005. The aim of the investigation was to evaluate the impact of organic and chemical fertilizers on the chemical composition of seeds of different cultivars. The following fertilizers were applied: humic acid fertilizers (the rate was calculated according to the required amount of Humistar) – 30 l ha-1; complex fertilizers (N:P:K – 10:10:20) – 500 kg ha-1; compost (70% manure + 30% plant residues) – 40 t ha-1; complex fertilizers (N:P:K – 10:10:20)+ humic acid fertilizers – 500 kg ha-1 + 30 l ha-1. Standard analytical methods were used to determine crude fat, protein and fibre content. Higher amounts of crude fats were found in seeds of the control (non-fertilized) pumpkins. Compost, humic acid and complex fertilizers had non-significant effects on the synthesis of crude fats, however, they increased the amount of crude fibre in seeds. The highest amount was found in seeds of the pumpkins fertilized with humic acid and complex fertilizers. A mixture of complex and humic acid fertilizers significantly reduced the amount of crude fat in oil-cakes. Complex fertilizers and mixtures of fertilizers stimulated the process of crude protein accumulation in seeds.

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247-250 J. Lanauskas, N. Uselis, A. Valiuškaitė and P. Viškelis
Effect of foliar and soil applied fertilizers on strawberry healthiness, yield and berry quality
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Effect of foliar and soil applied fertilizers on strawberry healthiness, yield and berry quality

J. Lanauskas¹, N. Uselis², A. Valiuškaitė² and P. Viškelis²

¹Lithuanian Institute of Horticulture, Kauno 30, LT–54333 Babtai, Kaunas distr., Lithuania;e–mail: j.lanauskas@lsdi.lt
²Lithuanian Institute of Horticulture, Kauno 30, LT–54333 Babtai, Kaunas distr., Lithuania;e–mail: institutas@lsdi.lt

Abstract:

The effect of foliar applied fertilizers (calcium nitrate, Kemira Ferticare 7–27–25, Phosfik 3–27–18 and Biokal 01) and calcium nitrate broadcasted to the soil on strawberries cv. ’Honeoye’ was investigated in 2004–2005 at the Lithuanian Institute of Horticulture. Strawberries were sprayed three times starting at full bloom in 8 day intervals. Calcium nitrate was applied to the soil in the rows during full bloom at the rate of 150 kg ha-1. Control plants were not fertilized. Ecological preparation Biokal 01 decreased amount of mite–infested strawberry plants by 9 percent units, and the incidence of leaf scorch (Diplocarpon earlianum (Ellis & Everh) Wolf) by 8 percent units in comparison with the control. Fertilizers had no effect on white leaf spot (Mycosphaerella fragariae (Tul.) Lind) infection. Foliar applied fertilizers had no positive effect on strawberry yield, average berry weight and berry firmness. Calcium nitrate applied to the soil decreased berry firmness. Biokal 01 and foliar applied calcium nitrate increased berry sucrose content. Fertilizers did not influence concentration of soluble solids, total sugars, ascorbic acid, nitrates and titratable acids.

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197–209 A. Makaraviciute
Effect of organic and mineral fertilizers on the yield and quality of different potato varieties
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Effect of organic and mineral fertilizers on the yield and quality of different potato varieties

A. Makaraviciute

Elmininkai Research Station of the Lithuanian Institute of Agriculture, Dvaro 6, N. Elmininkai, Anykš?iai district, LT-4930, Lithuania; e-mail: elmininkai@anyksciai.omnitel.net

Abstract:

The effect of different fertilizers on potato tuber yield and its quality was investigated at the Elmininkai Research Station of the Lithuanian Institute of Agriculture during 1997-1999. Potatoes of 10 varieties belonging to different maturity groups were grown on plots with different fertilization. The following potato varieties were investigated: the extra early ‘Venta’ and ‘Ukama’, the early ‘Voke’, the medium early ‘Mirta’ and ‘Karolin’, the medium late ‘Hertha’, ‘Saturna’ and ‘Agria’, and the late ‘Aistes’ and ‘Speci’.
It was established that different fertilizers, varietal properties and meteorological conditions during the potato vegetation period significantly influenced the yield and  quality of different potato varieties. The highest potato tuber yields (20.1–29.6 t ha-1) of all the tested varieties were harvested when one-component and complex mineral fertilizers with microelements had been applied, the lowest (14.6–21.7 t ha-1) when manure (60 t ha-1) had been used in spring. The highest starch and dry matter content had potatoes of the following varieties: the early ‘Voke’ (up to 16.3% and 22.6%, respectively), the medium early ‘Karolin’ (up to 15.6% and 21.8%, respectively), the medium late ‘Saturna’ (up to 17.4% and 23.7%, respectively) and the late ‘Speci’ (up to 16.3% and 22.6%, respectively). The 1998 vegetation period was the most favourable for potato tuber yield, and the 1997 vegetation period for the accumulation of starch and dry matter. The vegetation period of 1999 was the most unfavourable both for potato tuber yield and the accumulation of starch and dry matter.

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