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Uticaj paragenetskih faktora na intenzitet plodnosti kod krava simentalske rase
Get PDFIn scientific literature, fertility is generally assessed through age at first conception, gestation length, length of service period, calving interval, and calf birth weight.
Determination of the effect of particular non-genetic factors on the above traits is a vital step in cattle breeding and reproduction.
Length of calving interval is largely governed by the effect of non-genetic factors, viz. fixed effects generally including the effect of breeding region, season of birth, calving season, year of birth, calf sex and their interactions, and continuous or regression effects including age at first conception or age at calving.
The effect of fixed and continuous non-genetic factors on length of calving period was analysed in 245 Simmental cows (907 calving interval) in three breeding regions, with the effect of season of birth as a fixed factor and cow age at first conception as a continuous factor being highly significant (P 0.05).U literaturi plodnost se najčešće posmatra preko uzrasta pri prvoj oplodnji, trajanja bremenitosti, servis perioda, intervala između telenja i mase teladi pri rođenju.
Determinisanje uticaja pojedinih sistematskih faktora na pomenute osobine od velike je važnosti u procesu odgajivanja i reprodukcije goveda.
Dužina intervala između telenja definisana je najvećim delom dejstvom paragenetskih faktora, od kojih kao fiksni uticaji najčešće se pominju uticaj odgajivačkog područja, sezone rođenja i telenja, godine rođenja, pola teladi i njihove interakcije, a od kontinuelnih ili regresijskih uzrast krava pri prvoj oplodnji ili telenju.
Analiza uticaja fiksnih i kontinuiranih negenetskih faktora na dužinu odnosno trajanje intervala između telenja izvršena je kod 245 krava (907 međutelidbenih intervala) simentalske rase raspoređenih na tri odgajivačka područja pri čemu je uticaj sezone rođenja kao fiksnog i uzrasta krava pri prvoj oplodnji kao kontinuiranog faktora bio visoko značajan (P0.05)
Ispitivanje performansi modifikovanog rotavatora u voćnjaku
No full textRotary tillage implements are now projected as important tillage machinery for better seedbed preparation; however the ordinary rotavator being in line with the tractor center line at the rear cannot be used in orchards due to the hindrance posed by narrow space between the plants. Therefore, the concept of a modified offset rotavator was proposed, which could perform intercultural operation between the plants. The study was conducted to evaluate the performance of the modified offset rotavator in mango orchard of Horticulture Research Center, Pantnagar. It was found that the draft (negative) for the L-shaped blades increased (1086.8 to 1651.3 N) as the forward speed increased (2.0 to 3.0 km/h) with Increase in depth of cut (80 to 120 mm) for the shield kept in the lowered (down) position and fuel consumption was higher 9.40 l/h at given forward speed 3.0 km/h with 120 mm depth of cut. Soil break up (mean mass diameter) resulting from the Impact action of L-shaped blades on soil was found increased (1.21 to 2.20) as the forward speed increased (2.0 to 3.0 km/h). The extent of residue incorporation was the maximum 96.68% at forward speed 2.0 km/h with 120 mm depth of cut, whereas at higher forward speed 3.0 km/h, field performance index was observed 89.54%. The minimum area uncovered near the girth was reported at higher girth while plant injury resulted from impact of sensing assembly with 83.3% in form of scratches on the plant girth.Rotacioni priključci za obradu zemljišta su važne mašine za pripremu setvene posteljice. Uobičajeni zadnji rotavator u liniji sa centralnom osom traktora ne može da se koristi u voćnjacima zbog rastojanje stabala u redu. Zato je ponuđeno rešenje modifikovanog rotavatora za obradu prostora u redu. Istraživanje je izvedeno radi ocene performansi ovog modifikovanog rešenja. Utvrđeno je da se otpor kod L noževa povećao (od 1086.8 na 1651.3 N) sa povećanjem radne brzine (od 2.0 na 3.0 km/h) i povećanjem dubine (od 80 na 120 mm) sa spuštenim štittom i i povećanom potrošnjom goriva od 9.40 l/h pri brzini od 3.0 km/h
Razvoj informacionog sistema za sakupljanje podataka iz više izvora
No full textPrecision agriculture has created a technology revolution in production agriculture and it requires reliable technology to acquire accurate information on crop conditions. A ground-based integrated sensor and instrumentation system was developed to measure real-time crop conditions. The integration system included multispectral camera and N-sensor for real time Nitrogen application. The system was interfaced with a DGPS receiver to provide spatial coordinates for sensor readings. Before mounting of the sensors on modified paddy transplanter, different mountings and frames were attached with the paddy vehicle to mount the sensors, camera and power source. Battery mounting plate was required to fit imported 12 V & 80 A battery on vehicle. New bracket had fabricated to suit the new battery and it can be adjusted vertically 25~30 mm as per the requirement. For overturning balancing of rice transplanter extra weights of 100 kg were added at the rear of the rice transplanter. Trails were done in puddle rice field. By adding additional weight, there was no problem of over turning in the field in normal operations. The results showed that the integration sensor and instrumentation system supports multi-source information acquisition and management in the farming field except high clearance of tractor.Precizna poljoprivreda je dovela do tehnološke revolucije u poljoprivrednoj proizvodnji, koja zahteva pouzdanu tehnologiju za sakupljanje tačnih informacija o stanju useva. Zemaljski integrisani senzor i sistem instrumenata su razvijeni za određivanje stanja useva u realnom vremenu. Ovaj integrisani sistem je uključio multispektralnu kameru i N senzor za primenu azota u realnom vremenu. Sistem je povezan sa DGPS prijemnikom za određivanje prostornih koordinata očitavanja senzora. Pre postavljanja senzora na modifikovanu sadilicu postavljeni su razni sklopovi i ramovi koji nose senzore, kameru i izvor napajanja. Napajanje je obezbeđeno sa akumulatorske baterije na vozilu, 12V-80A. Za obezbeđenje vozila od prevrtanja postavljeni su dodatni tegovi od 100 kg na zadnju stranu
Metod određivanja kvaliteta fluidizacije u sušarama sa pseudofluidizovanim slojem zrna
No full textThe investigation results of pseudofluidization grain uniformity in grain dryers. The new method of fluidization quality estimation that allows providing more uniform heating of grain material and enhancing drying process is suggested. The method consists in determining light beam intensity, penetrating through grain layer. The recommendations on choice of optimal structural parameters of drying chamber of grain dryers which should be followed at its designing are given.U radu su prikazani rezultati ispitivanja ujednačenosti pseudofluidizacije u sušarama za zrno. Predložen je novi metod ocene kvaliteta fluidizacije koji omogućuje dobijanje ujednačenijeg grejanja zrnastog materijala i unapređenje procesa sušenja. Metod se sastoji iz određivanja intenziteta zraka koji prodire kroz sloj zrna. Date su preporuke za izbor optimalnih strukturnih parametara komore u sušari za zrno kojih se treba pridržavati pri njenom konstruisanju
Uticaj sistema gajenja u promenljivim vremenskim uslovima na prinos bosiljka
Get PDFThe effect of weather conditions, precipitations and mean daily air temperatures in the vegetation period 2012-2016 on the fresh mass yield of basil (Ocimum basilicum L.) in the organic and conventional production systems was investigated. Trials were carried out on chernozem at the experimental fields of the Institute of Field and Vegetable Crops located in Bački Petrovac. The highest yield in the first harvest was obtained in 2016, in the second in 2013, while the lowest yield was recorded in both harvests in 2012. Growing system is not affect the yield of the basil fresh mass, while the changeable weather conditions in different years had a significant or highly significant effect to the yield.Analiziran je uticaj vremenskih uslova, padavina i srednjih dnevnih temperatura vazduha u vegetacionom periodu 2012-2016. godine na prinos sirove mase bosiljka (Ocimum basilicum L.) koji je gajen u sistemu organske i konvencionalne proizvodnje. Ispitivanja su vršena na zemljištu tipa černozem, na eksperimentalnim poljima Instituta za ratarstvo i povrtarstvo u Bačkom Petrovcu. Najveći prinos u prvom otkosu ostvaren je 2016, u drugom 2013. godine, dok je najmanji prinos u oba otkosa postignut 2012. Sistem gajenja nije značajnije uticao na prinos sirove mase bosiljka, dok su promenljivi vremenski uslovi, odnosno različite godine imale značajan ili veoma značajan uticaj na prinos
Uticaj različitih varijanti đubrenja na kvantitet i kvalitet zrna pšenice
Get PDFThe research examined the effect of different ways of fertilization on the 1000 grain yield and protein content of wheat. For research was used wheat variety Pobeda. The experiment was set in two variants with and without diazotrophs. For both variants was performed before seeding fertilization and tilled complex NPK fertilizer in four levels with a ratio of nutrients 8:24:16 and variant Đ2 250 kg ha-1, Đ3-375 kg ha-1 and Đ4 500 kg ha-1. During supplemental feeding wheat entered the urea in an amount of Đ2-108 kg ha-1 Đ3-196 kg ha-1 Đ4-260 kg ha-1. Inoculation of seeds with a mixture of different types of diazotrophs (Azotobacter chroococcum, Azospirillum lipoferum, Pseudomonas fluorosciencs, Bacillus subtilis) was conducted before seeding. The same a mixture of diazotrophe was conducted with foliar treatment in the phase of tillering in an amount of tillering 5 l ha-1. At the end of the vegetation it has been established that the studied traits were increased in the variant with the application diazotrophs in all variants of fertilization. 1000 grain weight was increased by 5,54%. The highest 1000 grain weight was the variants Đ2 39,5 g. The height yield with inoculation was increased by 7.78%. There is a correlative relationship between nitrogen dose and the yield. The regression line shows the trend of rising yields, which was not in high correlation with large amounts of mineral nitrogen. The protein content was increased by 7.38%.U istraživanjima je ispitivan uticaj različitih načina đubrenja na masu 1000 zrna, visinu prinosa pšenice i sadržaj proteina. Za istraživanja se koristila pšenica sorte Pobeda. Ogled je postavljen u dve varijante sa i bez primene diazotrofa. Za obe varijante ogleda obavljeno je predsetveno đubrenje i zaorano kompleksno NPK mineralno đubrivo u četiri nivoa sa odnosom hraniva 8:24:16 i to za varijantu Đ2 250 kg ha-1, Đ3-375 kg ha-1 i Đ4 500 kg ha-1. Prilikom prihrane pšenice uneta je urea u količini Đ2-108 kg ha-1 Đ3-196 kg ha-1 Đ4-260 kg ha-1. Pred setvu je obavljena inokulacija semena sa smešom različitih vrsta diazotrofa Azotobacter chroococcum, Azospirillum lipoferum, Pseudomonas fluorosciencs, Bacillus subtilis. Istom smešom diazotrofa je obavljen folijarni tretman u fazi vlatanja u količini od 5 l ha-1. Na kraju vegetacije utvrđeno je da su ispitivane osobine bile povećane u varijanti sa primenom diazotrofa u svim varijantama đubrenja. Masa 1000 zrna bila povećana za 5,54%. Najveća masa 1000 zrna bila pri đubrenju Đ2 39,5 g. Visina prinosa pri inokulaciji bila je poveća za 7,78%. Postojala je korelativna zavisnost između količina primenjenog azota i visine prinosa, a linija regresije pokazuje trend rasta prinosa koji nije bio u visokoj korelaciji sa velikim količinama mineralnog azota. Sadržaj proteina bio je povećan za 7,38%
Productivity and Quality of Bulgarian Lavender Variaties
Get PDFBulgarian lavender varieties / Lavandula vera / are well known to the world aromatic, chemical and pharmaceutical industry. Specific climatic conditions characterized by cold winters, short springs and hot summers are very favourable for rapid growth and development of lavender plants. Genetic material created under these conditions was demonstrated with varieties: Sevtopolis, Druzhba, Yubileyna, Raya, Hemus, Hebаr and Karlovo, the potential of which in the form of the amount of harvested flowers varies from 560 to 690 kg / da in that with high content of essential oil in the range of 1.9 to 2.6 percent. Bulgarian lavender oil is high quality and is in direct competition with French oil
Uticaj mineralne ishrane na prinos ozime pšenice (Triticum aestivum L.)
Get PDFInvestigations were carried out during the 2006/2007 year on stationary field trial, the Center for Small Grains in Kragujevac. The objective of this study was to investigate the influence of mineral nutrition on the yield of winter wheat varieties (Lazarica, Takovčanka, Kg 56S, Kg 100 i Ana Morava). For these investigations were conducted two experiments (N1-80 kg ha-1 and N2-120 kg ha-1). Analysis of variance indicates very significant effects of cultivar on the grain yield, 1000-grain weight and test weight. Analysis of variance for the impact of nitrogen rates (N1 and N2) on investigated traits was found that doses of nitrogen in combination with NPK fertilizers significantly affected only on grain yield.Istraživanja su izvedena tokom 2006/2007. godine na stacionarnom poljskom ogledu, Centra za strna žita u Kragujevcu. Cilj ovog istraživanja je bio da se ispita uticaj mineralne ishrane na prinos ozime pšenice sorte (Lazarica, Takovčanka, Kg 56S, Kg 100 i Ana Morava). Za ova istraživanja su izvedena dva ogleda (N1-80 kg ha-1 i N2-120 kg ha-1). Analizaom varijanse je utvrđen vrlo visoko značajan uticaj sorte na prinos, masu 1000 zrna i hektolitarsku masu. Analizom varijanse za uticaj doze azota (N1 i N2) na ispitivane osobine utvrđeno je da su doze azota u kombinaciji sa NPK đubrivima značajno uticale samo na prinos zrna
Sorta facelije NS priora za proizvodnju biomase u cilju dobijanja voluminozne stočne hrane
Get PDFCalifornia bluebell (Phacelia tanacetifolia Benth) is a hardy plant forage. It is grown for seed production, for obtaining green forage, silage, hay, as well as crop protection, crop of green fertilizers and as bee pasture.
The experiment the new variety California bluebell, NS Priora, was carried out in four replications on plots of the Institute of Field and Vegetable Crops in Backi Petrovac (φN 45 ° 20 ', λE 19 ° 40', m.s.l. 89), in 2016. Cellulose content in the grain of variety NS Priora was 4.91%, while the average yield of raw biomass was 25,000 kg ha-1. NS Priora has achieved high yields of raw biomass and good grain quality and proved to be a good feedstock for the production of seeds and roughage.Facelija (Phacelia tanacetifolia Benth) je jednogodišnja krmna biljka. Koristi se za proizvodnju semena, za dobijanje zelene krme, silaže, sena, kao zaštitni usev, usev za zelenišno đubrenje i kao pčelinja paša.
Ogled sa novom sortom facelije, NS Priora, izveden je u četiri ponavljanja na parcelama Instituta za ratarstvo i povrtarstvo u Bačkom Petrovcu (φN 45°20', λE 19°40', m.s.l. 89), u 2016. godini. Sadržaj celuloze u zrnu sorte NS Priora iznosio je 4,91% dok je prosečan prinos sirove biomase iznosio 25.000 kg ha-1. NS Priora je ostvarila visoke prinose sirove biomase i dobar kvalitet zrna i pokazala se kao dobra sirovina za proizvodnju semena i voluminozne stočne hrane