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

Abstract

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.

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

“…The concentration of dry matter of Rumex OK 2 increased from 7.42% in March to 56.62% in June. Depends on weather condition and dry matter concentration, the harvesting of Rumex OK 2 for direct combustion is the best at the end of June or during July (Rolinec et al, 2018b), when is the concentration of dry matter the highest. With enough water in soil starts growth of Rumex OK 2 in few weeks after first harvesting.…”

“…Usťak (2007) as well as Rakhmetov (2018) consider hybrid of Rumex patientia L. × Rumex tianschanicus A.Los (Rumex OK 2) as one of most perspective energetic plant in climatic condition of V4 countries. Gross energy concentration in Rumex OK 2 plant as well as in silage made from wilted plants were published in our previous publications (Rolinec et al, 2018a and2018b). Ignore the content of oxalic acid, Rumex OK 2 can be utilised as well as a source of nutrients for ruminants.…”

Hybrid sorrel: cultivation potential and use as a novel non‐food multipurpose crop

“…The gross calorific value is 18-19.2 MJ kg −1 . 30,85 The gross calorific values vary depending on the harvest time and the biomass treatment method, as shown in Table 9.…”