The changes of the assimilation pigments content of turf Festuca spp. leaves after application of different nutrition forms

Rakhmetov²,

Bíro

et al. 2018

Licensed under a Creative Commons Attribution 4.0 International License Aim of this study was to determine the gross energy concentration of fresh, wilted and ensiled Rumex OK 2 (Rumex patientia L. × Rumex tianschanicus A.Los.) from spring months and June. Samples were collected in spring months and June of the year 2018. The plant of Rumex OK 2 consist in March mainly from rosette of leaves and the stalk is not higher than leaves, from April is stalk higher than rosette of leaves. The height of Rumex OK 2 during analysed months was following, March 60.96 ±5.22 cm; April 114.70 ±35.15 cm, May 168.31 ±39.74 cm and June 197.41 ±48.44 cm. Rumex OK 2 silage was made from wilted matter, with or without of addition of dried molasses. Gross energy was determined as the heat released after combustion of a sample (Leco AC 500) in MJ per kilogram of dry matter (DM) of the sample. The dry matter and gross energy concentration of fresh Rumex OK 2 increased during study, dry matter from 7.42% in March to 56.97% in June and gross energy from 18.00 MJ kg -1 of DM in March to 18.88 MJ kg -1 of DM in June. Statistically significant (P <0.05) higher concentration of dry matter, as well as gross energy was detected in wilted Rumex OK 2 samples and silages from May compared to April. Addition of dried molasses to wilted Rumex OK 2 did not affected concentration of gross energy in silages (P >0.05). From all analysed Rumex OK 2 samples the highest concentration of gross energy had silage from May with addition of dried molasses, 19.04 MJ kg -1 of DM. The utilisation of Rumex OK 2 from spring months can by neither for bioenergy production as a source of renewable energy, or after evaluation of nutritive value as a source of energy and nutrients in animal nutrition in form of pasture and silage. Rumex OK 2 from summer months seems to be utilized only as a source of heat via direct combustion.

Section: Resultsmentioning

confidence: 99%

Energy content of hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) samples from spring months and June

Rakhmetov²,

Bíro

et al. 2018

“…and by fertilisation. On the other hand, fertilisation is important factor of plant production (Hric et al 2018;Kovár et al 2017). In disagreement with statement of Hatcher et al (1997), that young leaves of dock plant contains the lowest content of oxalates, result of this study was, that concentration of oxalic acid was highest in silage from younger plants (April and September) and decreased with the time (Table 3).…”

Section: Resultsmentioning

confidence: 99%

Nutritional value and fermentation characteristics of silage made from hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) in different months during the year

Rakhmetov²,

Bíro³

et al. 2018

The aim of this study was to determine the nutritive value and fermentation parameters of silage made from hybrid Rumex patientia L. × Rumex tianschanicus A.Los (Rumex OK 2). Silages were made in months September, October and November of the year 2017 and next in April and May of the year 2018. In each month two variants were analysed, one without additives and second with an addition of 1% of dried molasses to wilted Rumex OK 2 plants. After 5 weeks fermentation in hermetic sealed plastic bags at temperature 20 °C the concentration of nutrients and parameters of fermentation were analysed in average samples. The content of dry matter in all silages were low and ranged from 7.1 to 18.8%. Content of crude protein was highest in autumn months, when was from 289 to 339 g.kg -1 DM, which is much more compared to alfalfa silages. Crude fiber was in spring months from 295 to 422 g.kg -1 DM and in autumn months from 126 to 166 g.kg -1 DM. Development of fiber components was similar to development of crude fiber content. The concentration of crude protein and neutral detergent fiber in Rumex OK 2 silages from autumn months meet the criteria for first class legume silage. Only silages from October and November had the content of lactic acid more than 10 g.kg -1 of original matter. Addition of dried molasses increased (P <0.05) concentration of lactic acid and decreased (P >0.05) concentration of acetic acid in silages from September, October, April and May. All Rumex OK 2 silages did not contain butyric acid. Silage pH value appertain to its dry matter concentration was relative high, which make impossible the good overall assessment. However, according to concentration of crude protein, neutral detergent fiber and proteolysis can be Rumex OK 2 silages from autumn months considered as a nutritional valuable feed. On the other hand Rumex OK 2 silage from September contains high concentration of oxalic acid, which can be potentially hazardous for animals.

“…The concentration not only of dry matter but also of other nutrients is affected by fertilisation (Hric et al, 2018;Kovár et al, 2017). According to concentration of crude protein and crude fiber is nutritional quality of Rumex OK 2 in March and April very good (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Nutritional value of hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) in different periods

Rakhmetov²,

Bíro

et al. 2018

The aim of this study was to determine the nutritive value of hybrid Rumex patientia L. × Rumex tianschanicus A.Los (Rumex OK 2). Rumex OK 2 can be considered as a technical or energetic plant for renewable production of biomass or as a feed as source of nutrients for animals. In this study two harvestings were planned, firs cut was realised in June (growth from March to June) and second cut was realised in November (growth from July to November). Samples of Rumex OK 2 plants were collected in the 20 th day of the month in March to June and in September to November. Concentration of nutrients were detected according to Regulation no. 2145/2004-100. Fresh Rumex OK 2 samples from March 7.42%, April 8.71% and September 4.89% had very low concentration of dry matter (DM). On the other hand samples from March, April, September and October had high concentration of crude protein in range from 31.42 to 24.54% of DM. From start of growth in spring to time of firs cut in June increased both concentration of dry matter from 7.42 to 56.62% and concentration of crude fibre from 14.86 to 47.38% of DM. Concentration of fat in Rumex OK 2 is low and similar to that of maize plant or alfalfa, whereas concentration of nitrogen free extract in Rumex OK 2 plant is similar only to alfalfa. Results of this article bring compact view over nutritional characteristic of Rumex OK 2, which can be according to gained results about nutritional value used as a source of nutrients in animal nutrition, or as a source of renewable biomass for bioenergy production.