Tag Archives: fertilizer

143–149 R. Mieldažys, E. Jotautienė, A. Pocius and A. Jasinskas
Analysis of organic agricultural waste usage for fertilizer production
Abstract |
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Analysis of organic agricultural waste usage for fertilizer production

R. Mieldažys*, E. Jotautienė, A. Pocius and A. Jasinskas

Aleksandras Stulginskis University, Faculty of Agricultural Engineering, Institute of
Agricultural Engineering and Safety, Studentu g. 15b, LT-53361, Akademija, Lithuania
*Correspondence: ramunas.mieldazys@asu.lt

Abstract:

Waste management, especially biodegradable (organic) waste, is highly relevant in agriculture. Increasing the intensity of agricultural production inevitably increases pollution of soil, water and air due to chemical, biological and other effects because of untidy agricultural waste. Currently there is a search for new and more rational ways to use waste for new forms of energy, making fertilizer, building materials and other products. One of the processes of biodegradable waste management is pelleting; i.e., the processing of recyclable materials into organic ecological products.
The SWOT analysis-expert, literature survey methods were used for the analysis of animal and plant origin organic agricultural waste’s suitability for production of fertilizer. The analysis has shown that the granulation of animal waste allows making better use of nutrients, significantly reduces the amount of fertilizer needed to be deposited into the soil and reduces the cost of storing, transportation and spreading into the soil. SWOT analysis motivated the need for further research of manure waste and its pelletizing.

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451-454 L. Narits
Effect of Top-fertilizing of Raw Protein and Glucosinolates Content of Winter Turnip Rape
Abstract |

Effect of Top-fertilizing of Raw Protein and Glucosinolates Content of Winter Turnip Rape

L. Narits

Jõgeva Plant Breeding Institute, J.Aamisepa 1, EE48309 Jõgeva, Estonia;
e-mail: Lea.Narits@jpbi.ee

Abstract:

Rapeseed is a major oil–yielding crop, ranking third place after soybeans and oil palm in the world. Rapeseed contains as average 36–38% crude protein and content of anti–nutritional compounds, among which glucosinolates have received the major attention. The object of the present study was to evaluate the effect of the nitrogen rate and different application times to the crude protein and glucosinolate content of winter turnip rape. The trials were carried out at the Jõgeva Plant Breeding Institute in the 2007–08, 2008–09 and 2009–10 growing seasons. Ammonium sulfate (nitrogen content 21%, sulphur 24%) was used as top–fertilizer. Three different nitrogen rates, 120, 140 and 160 kg N ha−1 and three different application times were used: A) once at the beginning of spring growth (oilseed rape growing code 26), B) A + when the main stalk was 10 cm (code 33), C) B + start of flowering (code 60) (a total of nine different variants) in equal portions. The results indicate that the quantity of the fertilizer has not as strong an impact as application time on the glucosinolate content. The lowest glucosinolate content was obtained from the variant of one N application. The highest protein content was obtained from the variant of three times split-N.

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191-197 L. Balezentiene and E. Klimas
Effect of organic and mineral fertilizers and land management on soil enzyme activities
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Effect of organic and mineral fertilizers and land management on soil enzyme activities

L. Balezentiene and E. Klimas

Lithuanian University of Agriculture, Studentų 11, Akademija LT– 53361, Kaunas distr.;e–mail: ligita.balezentiene@lzuu.lt

Abstract:

Sustainable and rational management of agrophytocenoses depends on various bio-indices and methods of application, particularly the development and protection of soil resources (Lai et al., 2002). Among other indices, enzyme activity is proposed as a universal index of soil fertility and contamination (Dilly et al., 2003). To ascertain and to make a comparison of bioactivity variation during the vegetation period, soil (Endophypogleyi-Eutric Planasols-Ple-gln-w, artificial drainage) samples were collected from rotation fields of different fertilizing and farming systems (intensive (IF) and organic (OF)) at the Training farm of the Lithuanian University of Agriculture during 2007–2008. N application stimulated urease and saccharase activity in different farming systems (OF and IF) and fertilizing management (manure and mineral fertilizers). When comparing mean soil bioactivity values of 2 years the highest manure effect was detected in the application year (winter wheat treatment) and conditioned the highest urease (8.21 mg NH +–4N g-1) and saccharase (24.52 mg CG g-1 24 h-1)activity but gradually decreased later. The lowest mean of urease (3.62 mg NH +–4N g-1) andsaccharase (22.07 mg CG g-1 24 h-1) activity occurred in IF soil where mineral fertilizers were applied. Soil bioactivity properties (urease and saccharase activity) were positively correlated with soil nutrients (Corg., Ntotal). Urease and saccharase activity properties reflect changes of fertilizer type and management and thus can be used as bio-indicators of soil fertility.

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