Feld experiment to determine responsiveness of plants to a depth of sowing and the economic and environmental value of dry matter yield on ecologically important and/or waterside areas was carried out in the valley of the river Pesnica (Zamarkova). The experiment was designed as a split-plot with four replications. The plants treatments on main plots were: alfalfa, (Medicago sativa), red clover (Trifolium pratense), and two grass-clover mixtures (TDM1 and TDM2). The depths of sowing (0.5 cm and 2 cm) were subplots. We established that the dry matter yield of the first cut depends on the plant species and the depth of sowing, while the yield of second cut indicates a statistically significant dependence only on the plant species. Legumes and grass-legume mixtures sown at a depth of 0.5 cm obtained the highest dry matter yield. The highest dry matter yield at the first cut was produced by legume crops sown in pure-stand. The highest but statistically comparable dry matter yield of the second cut was achieved with the grass-clover mixtures based on red clover and red clover sown in pure-stand.
F.27 Contribution to preserving/protecting natural and cultural heritage
COBISS.SI-ID: 3830572The field experiment to determine the suitability of production of alfalfa (Medicago sativa L.) and its economics and environmental value of dry matter yield on waterside areas was carried out in the years 2014 and 2015 in the Pesnica valley near the village Zamarkova (245 m above sea level, 46 ° 34 '29.18 "N, 15 ° 47' 33.33" E). The experiment was designed as a randomized block in four replications. Individual treatment in experiment represented (L) alfalfa, (ČD) red clover, (TDM 1) a mixture of alfalfa and grasses and (TDM 2) a mixture of red clover and grasses. In the experiment, the economic viability of alfalfa production in the growing condition similar to those in year 2014 was observed as less suitable than production of grass – legume mixtures. However, mixtures in the less adequate growing condition were reached more stable and higher yield than the legumes in pure-stand.
F.27 Contribution to preserving/protecting natural and cultural heritage
COBISS.SI-ID: 4040748Quality feed, such as alfalfa hay, is indispensable in modern dairy farming. Due to crumbling of the leaves that consequently shatter off it has been recommended for a long time to ensile wilted alfalfa with various additives. Mechanical losses during field curing are higher if handling with plant material is inappropriate and if weather conditions are unfavorable. Therefore, a field experiment has been carried out in 2015 at second cut of alfalfa. The aim of experiment was to evaluate mechanical losses due to leave shattering in two wilting regimes (24 and 71 hours) and two drying regimes (142 and 166 hours). The losses of leaves due to crumbling were determined at each harvest with the vacuum-cleaner method (Staubsaugermethode, FAT Berichte). Mechanical losses during 24-h wilting of alfalfa reached 5.4%, after 71-h of wilting 6.4%, after 142-h of drying 7.1% and following 166 hours of drying 10.1%. The results show that if alfalfa is being dried in swaths and the crop is being adequately handled the mechanical losses may retain on relatively low level.
F.18 Transfer of new know-how to direct users (seminars, fora, conferences)
COBISS.SI-ID: 5014632The effect of nitrogen fertilization of alfalfa and seed inoculation with Sinorhizobium meliloti on yields and forage composition in the first year of use is presented. Fertilization with small amounts of nitrogen (2 × 30 kg per hectare) increased the yield for about 10%. Increase was principally due to an increase in the first cut. It should be noted that it was the first mowing after sowing uninoculated seeds when the nitrogen fixation nodules were probably not yet fully formed. In the experiment where inoculated seeds were sown nitrogen fertilization did not affect the yield of alfalfa. Effect of inoculation on dry matter yield was comparable to fertilization with 30 kg N per hectare in the spring and after the first cut. The inoculation also increased somewhat crude protein content in the forage. The differences in net energy value between unfertilized and nitrogen fertilized alfalfa were small. Fertilization did not affect the crude protein content of the forage. It has been shown that in the given situation it makes more sense to inoculate the alfalfa with bacteria Sinorhizobium meliloti than to fertilize it with nitrogen fertilizers.
F.18 Transfer of new know-how to direct users (seminars, fora, conferences)
COBISS.SI-ID: 5024104Due to low concentration of sugars and high buffering capacity alfalfa forage can be classified as hard to ensile. On the basis of experiments carried out in the years 2015 and 2016, we demonstrated the changes of sugars and buffering capacity during the growing season. We found that the spring and late autumn forage is more suitable for ensiling than the summer forage. The data also show that for a favourable fermentation pattern, forage should be wilted to at least 400 g of dry matter per kilogram.
F.18 Transfer of new know-how to direct users (seminars, fora, conferences)
COBISS.SI-ID: 5327720