Abstract
The paper aimed to evaluate fertilizing effects of spent mushroom substrate (SMS) and slurry on dry matter productivity and value of legume-grass mixtures. The experiment was replicated three times, with a split-plot arrangement and plots of 3 m3 as experimental units. These species were grown as three legume-grass mixtures: M1–Dactylis glomerata, Lolium perenne, Medicago x varia T. Martyn; M2– Dactylis glomerata, Medicago x varia T. Martyn; M3–Lolium perenne, Medicago x varia T. Martyn. The experiment consisted of the following units: control (no fertilization); SMS (30 t/hm2); slurry (60 m3/hm2) (G); SMS (10 t/hm2) + slurry (60 m3/hm2); SMS (20 t/hm2) + slurry (40 m3/hm2); SMS mushroom substrate (30 t/hm2) + slurry (20 m3/hm2). During each growing season all the mixtures were harvested three times. The fresh matter from each plot was weighted and a sample of 0.6 kg was taken for further analysis. In the experiment the content of both total protein and crude fibre was dependent on the type of fertilizer and on the type of mixture. Forage from the plots with 20 t/hm2 of mushroom substrate and 40 m3/hm2 of slurry had the best nutritional value, with the highest amount of total protein. The contents of protein and crude fibre in the forage were more favourably affected by slurry than by spent mushroom substrate. Out of the mixtures from all plots, regardless of the type of fertilizer, the mixture consisting of Lolium perenne and Medicago x varia T. Martyn contained the highest content of protein. Keywords: fertilizer, spent mushroom substrate, nutritional value, protein concentration, fibre concentration DOI: 10.25165/j.ijabe.20181103.3726 Citation: Kazimierz J, Elżbieta M, Jacek S, Beata W, Anna K. Effects of spent mushroom substrate and slurry on nutritional value of grass and Medicago x varia T. Martyn mixtures. Int J Agric & Biol Eng, 2018; 11(3): 61–66.
Highlights
In crop rotation, growing grass after other crops repeatedly on the same field affects crop yields and soil quality in a positive way
Irrespective of the type of mixture (Table 3), the highest concentration of total protein was in the forage from the plot where 20 t/hm2 of mushroom substrate was applied together with 40 m3/hm2 of slurry (206.36 g/hm2), as well as from the object fertilized with slurry on its own (205.76 g/hm2)
In the experiment the contents of total protein and crude fibre were dependent on the type of fertilizer and the type of mixture
Summary
In crop rotation, growing grass after other crops repeatedly on the same field affects crop yields and soil quality in a positive way. This country leads in the creation of large amounts of spent mushroom substrate (SMS), an organic waste material which is a problem for the producers It is an extremely valuable organic fertilizermaterial which can be potentially used in agriculture as a good fertilizer[6,7,8,9]. Many researchers pointed that the high variability and unbalance of the chemical composition of the SMS is an unquestionable drawback, which oblige them to continually control their chemical composition and replenish the missing elements in order to improve the fertilizers propriety[19,20,21,22] Another valuable fertilizer is slurry, which is completely different from manure on both physical characteristics and effects on plants. It was pointed out that the nutrients in slurry are present in forms that more available to plants than in manure, which makes slurry a fast-acting fertilizer
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