1,720,973 research outputs found
Comparison of maize varieties grown for fodder
No full textTyrimo atlikimo vieta – Algimanto Mieliausko ūkis, Balbieriškis, Prienų raj.
Tyrimo tikslas – įvertinti kukurūzų, auginamų pašarui, taikomų agrotechnologinių sprendimų įtaką derliui ir kokybei.
Tyrimo uždaviniai:
1. Nustatyti, ar ankstyvesnė sėja duoda teigiamą efektą siloso kokybės parametrams.
2. Įvertinti skirtingos sėjos normos įtaką kukurūzų derlingumui.
3. Įvertinti skirtingo piktžolių naikinimo metodo įtaką derlingumui.
Lauko kukurūzų auginimo bandymai atlikti 2019 metais Algimanto Mieliausko pienininkystės ūkyje, Prienų rajone. Bandymo objektas – dviejų hibridų ‘IDA MGT’ ir ‘TK202’ kukurūzai (Zea mays L.).
Darbo metodas –Tiriama dviejų skirtingų kukurūzų veislių auginimo silosui galimybės, vertinamas sėjos tikslumas ir tankumas bei sėjos terminai bei skirtingų piktžolėtumo mažinimo įtaka kukurūzų derlingumui.
Tyrimų metu nustatyta, kad paankstinus kukurūzų sėklų hibridų IDA MGT ir TK202 sėjos laiką, palyginti su vėlesne kukurūzų hibridų IDA MGT ir TK202 sėklų sėja, gaunamas silosas, turintis didesnį sausųjų medžiagų kiekį. Kukurūzų grūdų ADF bei krakmolo kiekis gautas didesnis, kai kukurūzų hibridų IDA MGT ir TK202 sėklų sėja buvo atlikta anksčiau. Didžiausias kukurūzų hibridų IDA MGT ir TK202 derlius gautas sėjant 80 000 vnt. sėklų hektare. Padidinus hibridų IDA MGT ir TK202 sėklų sėją iki 100 000 vnt./ha stebimas derliaus kritimas abiejų tirtų hibridų atveju.
Vertinant skirtingų piktžolėtumo mažinimo būdų įtaką kukurūzų derlingumui, nustatyta, kad didesnis derlingumas gautas piktžoles naikinant herbicidiniu purškimu, o ne apdorojant mechaniniu būdu. Auginant IDA MGT derlingumas – kontrolė apie 5 t. ha-1, naikinant piktžoles mechaniniu būdu – derlingumas 9 t. ha ha-1, piktžoles naikinant herbicidais, derlingumas apie 10 t ha-1. Auginant hibridą TK202, derlingumas – kontrolė apie 5 t. ha-1, naikinant piktžoles mechaniniu būdu – derlingumas – 8 t ha-1, piktžoles naikinant herbicidais, derlingumas apie 9 t ha-1.
Raktažodžiai: kukurūzai, sėjos tankumas, sėjos laikas, piktžolės, derlingumas.
Place of research – Algimantas Mieliauskas farm, Balbieriskis, Prienu district.
The object of the research – is maize grown for cattle feed – for the production of silage.
The aim of the study was – to evaluate the impact of agrotechnological solutions applied to the yield and quality of maize grown for cattle feed.
Research tasks:
1. To determine whether earlier sowing has a positive effect on the final result.
2. To evaluate the influence of different sowing rate on maize yield.
3. To evaluate the influence of different weed control method on yield.
Research methods – methods of observation, measurement, analysis of laboratory tests were performed. The final work investigates the possibilities of growing two different varieties of maize for silage, evaluating weed control with both herbicides and mechanical weed control, evaluating sowing accuracy and density and sowing time. One of the problems in growing maize is the control of weeds, the use of herbicides causes stress to the plants and this affects the vegetation of the plant and the final quantity and quality of the crop. Also, when crops are compacted, there is a struggle between plants and they overshadow each other in an effort to get more sunlight and nutrients in the soil. It is important to appreciate that maize is a heat-intensive crop and that its vegetation process takes a long time, so the paper examines the possibility of sowing maize earlier to prolong its vegetation period and to mature and produce richer, higher quality crops.
Research results – It was found that different sowing rates affect the quantity and quality of the harvest. A study of the different sowing times of maize has shown that maize for silage can be sown earlier and yields a higher and better quality suitable for silage production.
Conclusions and recommendations – it is recommended to use a mechanical method of weed control, to bring forward the sowing time of corn and to reduce the crop density.
Vytauto Didžiojo universitetas / Vytautas Magnus UniversityŽemės ūkio akademija / Agriculture AcademyAgronomijos fakultetas / Faculty of AgronomyAugalų biologijos ir maisto mokslų k. / Department of Plant Biology and Food Science
Impact of natural mineral supplement on dairy cows productivity and production quality
No full textTyrimo tikslas: Ištirti natūralaus mineralinio priedo įtaką pieninių karvių produktyvumui ir produkcijos kokybei. Tyrimo metodai. Tiriant Kaolino E559 įtaką melžiamoms karvėms tvartiniu laikotarpiu buvo sudarytos dvi karvių grupės kontrolinė ir bandomoji po 10 karvių kiekvienoje. Kontrolinės ir bandomosios grupės karvės tvartiniu ir ganykliniu laikotarpiu buvo šeriamos ir laikomos vienodai. Bandomosios grupės karvėms į koncentruotus pašarus buvo primaišoma 100 kg jų masės po 1,5 kg kaolino E559 miltelių. Tyrimo rezultatai. Bandymai parodė, kad šeriant karves tvartinio laikotarpio racionais 100 kg koncentruoto pašaro pridėjus 1,5 kg Kaolino miltelių per tris mėnesius primilžis padidėjo vidutiniškai 10,3 proc., pieno riebumas 0,09 proc., o baltymų kiekis piene 0,28 proc. lyginant su kontrolinės grupės karvėmis, kurios priedo negavo.Objective of the Thesis: To study the impact of natural mineral supplement on the productivity of dairy cows and production quality. Research methods. The impact of natural mineral supplement kaolin E559 on dairy cows during the fattening period was studied; two control and experimental groups of 10 cows each were formed. They were kept tethered during the fattening period and pastured during the grazing period. Kaolin E559 powder was added to the concentrated feed of the cows in the experimental group, 1.5 kg of kaolin E559 powder per 100 kg of feed. Results of the research: In our experiments, the addition of 1.5 kg of Kaolin powder to 100 kg of concentrated feed increased the milk yield by an average of 10.3%, the fat content in milk by 0.09% and the protein content in milk by 0.28% over three months when feeding cows during fattening period, compared to control cows that did not receive the supplement.Vytauto Didžiojo universitetas / Vytautas Magnus UniversityŽemės ūkio akademija / Agriculture AcademyAgronomijos fakultetas / Faculty of AgronomyAugalų biologijos ir maisto mokslų k. / Department of Plant Biology and Food Science
Lizocimo G3x ir amilosubtilino G3x įtaka kiaulienos kokybei
No full textSantr. anglBibliogr.: 8 pavadVytauto Didžiojo universitetas / Vytautas Magnus UniversityŽemės ūkio akademija / Agriculture Academ
Fermentinių preparatų įtaka kiaulių fiziologinei būklei ir biocheminiamas mėsos rodikliams
No full textSantr. anglBibliogr.: p. 155 (6 pavad.)Vytauto Didžiojo universitetas / Vytautas Magnus UniversityŽemės ūkio akademija / Agriculture Academ
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