scholarly journals Perennial forage grasses, from breeding to healthy ruminant feed

2011 ◽  
Vol 27 (3) ◽  
pp. 599-614 ◽  
Author(s):  
D. Sokolovic ◽  
J. Radovic ◽  
Z. Tomic

Temperate forage grasses are the main components of grasslands occupying 40.5 % of the world?s terrestrial area and 30-40% of European agricultural area. They cover the land, providing a habitat and a source of food for domestic livestock, thus ensuring a supply of livestock products, with contributes to rural agricultural and economic development. Grasses are a natural food for ruminants. Rich in fibre, they provide the bulk necessary for good rumen function. Eaten at a sufficiently young stage, they are highly digestible and contain lot of energy. At this stage they also have high mineral and protein contents that cover a large part of animals? requirements. Grasslands usually produce the majority of the forage ingested by ruminant animals during grazing season. During winter housing grass hay and silage are often major parts of the staple diets. There are many improved grass genotypes in Serbia that share main characteristics: high yield and quality of dry matter within a target group of environments and in particular agricultural context. Beyond this common breeding goal there are vast of forage breeding programs as varied as the species upon which they are based and the breeders who develop and implement them. The intensification of forage production and utilization, especially during the second half of the twentieth century, led to a drastic reduction in the number of grass species in sown mixtures, as well as in permanent grasslands. Only a small number of species mainly the ryegrasses, timothy, cocksfoot and fescues are highly suited to intensive management. Moreover, in Europe from 1980 onwards, many forage systems were deintensified and wild or hardly selected species became more important in grasslands. Therefore, it is evident that importance of perennial grasses as animal feed will be increased in the future.

ISRN Agronomy ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
James K. Rogers ◽  
Frank J. Motal ◽  
Jagadeesh Mosali

Fifteen introduced and native warm-season perennial grasses were evaluated for yield, yield distribution, and quality in south-central Oklahoma. These grasses have production potential for forage and/or biofuel. Each was harvested one to four times per year. “Alamo” switchgrass (Panicum virgatum) had a two-year average dry matter yield of 17690 kg . Over 1/3 of this production occurred in May with a crude protein (CP) range of 97–115 g . Alamo’s high yield potential and early spring growth make it attractive for spring forage production and fall biomass production. Other grasses with two-year average dry matter yields over 11200 kg  and 1/3 of yearly production occurring early in the growing season that have potential dual purpose use include “Selection 75” kleingrass (Panicum coloratum), “Midland 99” bermudagrass (Cynodon dactylon), johnsongrass (Sorghum halepense), “Carostan” flaccidgrass (Pennisetum flaccidum), and “Ermelo” weeping lovegrass (Eragrostis curvula).


2007 ◽  
Vol 21 (1) ◽  
pp. 66-75 ◽  
Author(s):  
Guy B. Kyser ◽  
Joseph M. Ditomaso ◽  
Morgan P. Doran ◽  
Steve B. Orloff ◽  
Robert G. Wilson ◽  
...  

Invasive annual grasses, such as medusahead, can reduce forage production capacity and interfere with revegetation projects in California rangelands. Because of the taxonomic similarity to other more desirable grasses, achieving selective control of invasive annual grasses can be difficult. In selectivity trials conducted in Yolo and Siskiyou counties, CA, the herbicide imazapic gave control of many nonnative annual grasses yet provided some level of selectivity to specific perennial grasses used in revegetation projects throughout the western United States. The selectivity difference between newly seeded perennial and annual grasses was greater with PRE applications than with POST treatments. Both perennial and annual grasses within the tribe Hordeae were more tolerant to imazapic than other grass species. In addition, field experiments were conducted at three sites in northern California (Yuba, Yolo, and Lassen counties) and one in southern Oregon (Lake County) to test the response of imazapic to varying management conditions. Imazapic was applied PRE in fall (and also spring in Lake County) at rates from 35 to 210 g/ha on undisturbed rangeland, in comparison with rangeland cleared of standing plant material and thatch by either tillage, mowing and raking, or burning. Imazapic generally showed enhanced weed control when applied following disturbance. Rates as low as 70 g/ha, if combined with thatch removal, provided significant suppression of medusahead. In addition, disturbance alone generally reduced medusahead cover in the following year. Although imazapic showed potential for control of medusahead and other annual grasses, its selectivity window was relatively narrow.


Author(s):  
Osman Yüksel ◽  
Cahit Balabanlı

The aim of this investigation was to determine appropriate perennial grasses and their most suitable mixture ratios, which can be grown with alfalfa in binary mixtures. The research was conducted during 2009-2011 in Isparta (37.50 °N, 30.32 °E), located in the Western Mediterranean climate conditions. In the study, alfalfa was planted as a binary mixture with perennial ryegrass (Lolium perenne L.), orchardgrass (Dactylis glomerata L.), meadow fescue (Festuca pratensis Huds.), and smooth bromegrass (Bromus inermis Leyss.) in a randomized block design with three replications. Sowing ratios of alfalfa in the mixtures varied 20, 30, and 40%, and grass species ratios were 80, 70, and 60%. In the study, significant differences were found among the applications regarding hay yield, crude protein content, crude protein yield, NDF, ADF, land equivalent ratio (LER), and grass ratio in the hay (GR). The highest hay yield was obtained from alfalfa + orchardgrass and alfalfa + smooth bromegrass binary mixtures (25.98 and 25.78 t ha-1, respectively). Alfalfa + perennial ryegrass and alfalfa + meadow fescue mixtures gave the highest crude protein contents as 14.93 and 14.80%, respectively. The highest LER values were observed on perennial ryegrass and smooth bromegrass binary mixtures, and the highest grass ratios were determined in orchardgrass and smooth bromegrass mixtures made with alfalfa. Increasing the alfalfa sowing ratio in the mixtures positively affected all quality characteristics such as crude protein, NDF, and ADF. It was concluded that orchardgrass and smooth bromegrass binary mixtures with alfalfa produced high yield and quality hay and that the mixture should contain 40% alfalfa and 60% grass.


2021 ◽  
Vol 10 (1) ◽  
pp. 221
Author(s):  
V. Puyu ◽  
M. Bakhmat ◽  
Y. Khmelianchyshyn ◽  
V. Stepanchenko ◽  
O. Bakhmat ◽  
...  

On the basis of the "three sigma" rule, a statistical stratification of the Ukrainian effective community into economic welfare groups according to their social and economic status has been carried out, thus creating the basis for substantiating the expediency of reforming the forage production sector in order to further expand the production of organic livestock products through the up-to-date approaches to the formation and use of climate adaptive feed-related phytocenoses. In order to increase the productivity of grass fodder, an innovative model of the grass-grazing complex has been developed. Its structure includes a cyclic wedge of long-term cereal-bean pasture which involves perennial grasses of the botanical species adapted to the zonal ecological and technological conditions, a satellite wedge of traditional mixtures of annual crops and atypical pasture plants – burnet polygamous (Poterium poligamum Woldst. et Kit.), prairie dock (Silphium perfoliatum L.) and others, whose herbage is used during the off-season, when the main cyclic wedge is found to be low-yielding, as well as a sheltered base, equipped with outdoor hoppers and shelters designed to protect animals in bad weather. The introduction of meadows and pastures in the system of zonal fodder production will contribute to the improvement and stabilization of the production of cheap and adequately nutritious herbal feeds thus increasing the resource potential of the area.


Author(s):  
N. Novikov ◽  
D. Blagov ◽  
V. Nikitin ◽  
S. Mitrofanov ◽  
N. Panfyorov

The issues of planning the feed base of an agricultural enterprise, taking into account the productivity of the livestock sector have been considered in the paper. The developed program is a single interconnected system with two blocks of tasks: animal husbandry and crop production. This connection allows us to make multivariate calculations that ensure the most rational use of acreage and material resources on the basis of an integrated approach to the design of the feed base, taking into account natural, organizational, economic and technological factors. Based on the example of the agricultural enterprise in the Ryazan region that specializes in the production of dairy and crop products, a calculation for planning the output of livestock products has been made, taking into account the necessary land resources to provide high-quality animal feed. Based on the annual structure of the ration, taking into account the summer and winter stall housing, the need for acreage for forage crops grown by the farm has been determined, which amounted to 582 ha. The planned productivity of dairy cattle was equal to 5000 kg per lactation. At the subsequent stages the need for organic, mineral, lime and micro-fertilizers has been determined, providing the necessary level of productivity of feed crops, provided that the humus of the soil is not deficient. Based on the proposed structure of the annual ration and the calculated share of perennial grasses (53,44 %), a positive dynamics of soil humus was obtained for the crop rotation as a whole. The inclusion of perennial grasses in the crop rotation will allow the farm to ensure planned production of livestock products while maintaining a deficit-free balance of soil humus. According to the supply of nitrogen given the crop need additional introduction of ammonium nitrate in the amount of 839,7 centners. In addition, calculations have been made according to the requirements of lime fertilizers, which found that the specified area must input dolomite 2219,8 t. Also the doses of mineral fertilizers required to obtain the planned yields of crops have been calculated. The use of the developed software product allowed us to determine the need for boron–containing fertilizers – 1,08 centner, manganese – 3,38 centners and copper-containing – 0,46 centner.


Author(s):  
N. I. Kasatkina ◽  
Zh. S. Nelyubina

The biological properties of plants, their mutual relations under different growth conditions and at different periods of their life, must be known for obtaining highly productive agrophytocenoses with participation of a meadow clover (Trifolium pratense L.). Botanical composition and fodder productivity of perennial grasses in agrocenoses with participation of meadow tetraploid clover Kudesnik were studied in 2014-2017. It was revealed that in the first and second years of use the agrophytocenosis, the yield of green mass was formed due to meadow tetraploid clover, the share of its participation in the first mowing was at level of 71-87% and 64-97% respectively. Specific weight of clover in multispecies agrocenoses considerably decreased by the third year of use: in the first mowing up to 32-68%, in the second - up to 8-52%. At the same time, the percentage of long-term herbaceous grasses increased: meadow timothy (Phleum pratense L.) - up to 34-54%, eastern galega (Galéga orientális Lam.) - up to 33%, changeable alfalfa (Medicago x varia Martyn) - up to 22-54%, lotus corniculatus (Lotus corniculatus L.) - up to 14-19%. The proportion of weed admixture in single-species clover planting was 12%, in agrocenoses - 2-14%. The grass mixtures clover + timothy and clover + alfalfa + timothy were less infested by weeds. High yield of dry weight of single-species sowing of meadow tetraploid clover was obtained in the first two years of use - 7.8 and 6.5 tons / ha, respectively. By the third year of use, the productivity of clover has decreased to 2.9 t / ha. On average, for three years of use, the highest yield (6.2-6.3 t / ha) was formed by agrocenoses meadow tetraploid clover + meadow timothy and meadow tetraploid clover + changeable alfalfa + meadow timothy.


Genome ◽  
2005 ◽  
Vol 48 (4) ◽  
pp. 637-647 ◽  
Author(s):  
M A. Rouf Mian ◽  
Malay C Saha ◽  
Andrew A Hopkins ◽  
Zeng-Yu Wang

Microsatellites or simple sequence repeats (SSRs) are highly useful molecular markers for plant improvement. Expressed sequence tag (EST)-SSR markers have a higher rate of transferability across species than genomic SSR markers and are thus well suited for application in cross-species phylogenetic studies. Our objectives were to examine the amplification of tall fescue EST-SSR markers in 12 grass species representing 8 genera of 4 tribes from 2 subfamilies of Poaceae and the applicability of these markers for phylogenetic analysis of grass species. About 43% of the 145 EST-SSR primer pairs produced PCR bands in all 12 grass species and had high levels of polymorphism in all forage grasses studied. Thus, these markers will be useful in a variety of forage grass species, including the ones tested in this study. SSR marker data were useful in grouping genotypes within each species. Lolium temulentum, a potential model species for cool-season forage grasses, showed a close relation with the major Festuca–Lolium species in the study. Tall wheatgrass was found to be closely related to hexaploid wheat, thereby confirming the known taxonomic relations between these species. While clustering of closely related species was found, the effectiveness of such data in evaluating distantly related species needs further investigations. The phylogenetic trees based on DNA sequences of selected SSR bands were in agreement with the phylogenetic relations based on length polymorphism of SSRs markers. Tall fescue EST-SSR markers depicted phylogenetic relations among a wide range of cool-season forage grass species and thus are an important resource for researchers working with such grass species.Key words: phylogeny, EST-SSR, forage grasses, tall fescue.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Madhab Kumar Sen ◽  
Kateřina Hamouzová ◽  
Pavlina Košnarová ◽  
Amit Roy ◽  
Josef Soukup

AbstractBromus sterilis is an annual weedy grass, causing high yield losses in winter cereals. Frequent use of herbicides had led to the evolution of herbicide resistance in this species. Mechanisms underlying herbicide resistance in B. sterilis must be uncovered because this problem is becoming a global threat. qRT-PCR and the next-generation sequencing technologies can elucidate the resistance mechanisms. Although qRT-PCR can calculate precise fold changes, its preciseness depends on the expression of reference genes. Regardless of stable expression in any given condition, no gene can act as a universal reference gene. Hence, it is necessary to identify the suitable reference gene for each species. To our knowledge, there are no reports on the suitable reference gene in any brome species so far. Thus, in this paper, the stability of eight genes was evaluated using qRT-PCR experiments followed by expression stability ranking via five most commonly used software for reference gene selection. Our findings suggest using a combination of 18S rRNA and ACCase to normalise the qRT-PCR data in B. sterilis. Besides, reference genes are also recommended for different experimental conditions. The present study outcomes will facilitate future molecular work in B. sterilis and other related grass species.


Author(s):  
Н. Зезин ◽  
М. Намятов

Исследования Уральского НИИСХ и опыт передовых хозяйств Свердловской области показывают, что для повышения эффективности и стабильности кормопроизводства необходимо в структуре кормовых культур увеличивать удельный вес высокобелковых, высокоэнергетических и засухоустойчивых культур, производить подсев многолетних трав ежегодно на площади не менее 60 тыс. га, а в перспективе 7080 тыс. га. За последние 7 лет (20112018 годы) площади люцерны в области увеличились в 2 раза (до 23 тыс. га), кукурузы по зерновой технологии в 2,4 раза (до 20,9 тыс. га) и масличных культур в 3,1 раза (до 30,8 тыс. га). Опыт СПК Килачёвский Ирбитского района показывает, что освоение научно обоснованных биологизированных севооборотов, прошедших изучение в стационарных опытах Уральского НИИСХ, позволяет ежегодно получать высокие и стабильные урожаи всех сельскохозяйственных культур. В этом хозяйстве каждая кормовая культура размещается в своём севообороте. В СПК Килачёвский и ряде других хозяйств Свердловской области большое значение придаётся возделыванию люцерны, кукурузы и масличных культур. Площадь этих культур в расчёте на одну корову мы назвали белковоэнергетическим коэффициентом (БЭК). Анализ показал тесную взаимосвязь между белковоэнергетическим коэффициентом и молочной продуктивностью. Так, в СПК Килачёвский в 2016 году при удое 10196кг БЭК был равен 1,25 в 2017 году удой достиг 10798кг, БЭК 1,43 в 2018 году соответственно 11493 кг и 1,47 при количестве коров 29002977 голов. According to the investigations conducted at the Ural Agricultural Research Institute and experience of the leading farms in the Sverdlovsk region high effectiveness and stability of Forage Production requires wide cultivation of droughtresistant crops rich in protein and energy as well as seeding over 60 thousand ha (in the future 7080 thousand ha) by perennial grasses annually. For the last 7 years (20112018) areas of alfalfa increased by 2 times (up to 23 thousand ha), grain maize by 2.4 times (up to 20.9 thousand ha), oil crops by 3.1 times (up to 30.8 thousand ha). SPK Kilachevskiy (agricultural production cooperative) reported that the use of approved crop rotations tested at the Ural Agricultural Research Institute resulted in annual high and stable yields of all the crops. SPK Kilachevskiy and other farms of the region widely grow alfalfa, maize and oil crops. Land area for the cultivation of these crops per one cow is called proteinenergy coefficient (PEC). Proteinenergy coefficient was shown to have a significant correlation with milk productivity. SPK Kilachevskiy reported that in 2016 PEC and milk yield reached 1.25 and 10196 kg in 2017 1.43 and 10798 kg in 2018 1.47 and 11493 kg, respectively under 29002977 cows.


Author(s):  
LZ Baistruk-Hlodan ◽  
MM Кhomiak ◽  
HZ Zhapaleu

Aim. The purpose was to identify collection accessions – sources of valuable traits to use as starting material for creating varieties of perennial grasses in Western Ukraine. Results and Discussion. Perennial grasses play an essential role in improving the efficiency of forage production. They produce a fodder mass that contains major macro- and micronutrients, minerals, vitamins, amino acids, and other nutrients in available forms, with a high energy protein saturation. Practice shows that due to the introduction of varietal crops into production in combination with optimal technologies of their cultivation, which allows revealing the potential of each variety, it is possible to additionally obtain 20-30% higher yields of fodder mass annually and harvest 2 to 3-fold seed yields. In 2016-2020, a search was carried out and 570 new accessions of perennial grasses were recruited, of which 201 were legumes and 369 were graminaceous grasses. The collection contains 1,319 accessions, of which 232 are Trifolium pratense L., 115 are Trifolium repens L., 49 are Trifolium hybridum L., 107 are Lotus corniculatus L., 80 belong to other legume species (Medicago, Galega orientalis L. Galega orientalis L. and Trifolium species), 131 are Phleum pratense L., 187 are Dactylis glomerata L., 146 are Lolium perenne L., 53 are Arrhenatherum elatius (L.) J. et C.Presl., 67 are Festuca rubra L., 28 are Festuca trachyphylla L., 32 are Bromopsis inermis (Leyss.) Holub, 92 belong to other species of other types of graminaceous grasses (Festuca pratensis Huds., Festuca arundinacea Schreb., Agrostis alba L. etc.). Accessions that enter the Department are registered and sown for propagation in the field. After examination, valuable accessions are transferred to the National Depository and registered in the National Catalogue; the rest of the obtained seeds are used in working collections. Conclusions. The best collection accessions were identified by a set of economically valuable traits: sources of daily growth of shoots (30), winter hardiness (28), plant height (22), yield of green mass upon haymaking (28) and pasture (19) use, forage productivity (15), seed productivity (25), foliage (21), and disease resistance (23). They can be recommended as starting material to create varieties of perennial grasses with high yields of forage mass and seeds for various applications.


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