The paper deals with the problems of composting of grape pomace in strip compost piles. The three variants of compost piles formed from grape pomace and vegetables waste, wood chips and mature in varying proportions were tested. Turning of piles was performed using windrow turner PKS 2.8, in which the achieved performance was monitored. On the performance of windrow turner has a signifi cant infl uence also cross section or width and height of turning piles and the bulk density of ingredients including their moisture. In evaluating, attention has been paid to assessment of selected parameters (temperature, moisture content) of the composting process. From the viewpoint of temperature course, the highest temperature reached at the piles in Var. I (64.1 °C) and Var. II (55.3 °C). Moisture of compost piles in the individual variants did not diff er signifi cantly and ranged between 25-35%.
In Europe, there is annually available 8 million tons of grape pomace. From the viewpoint of waste management, pomace represents biotic waste produced in the FDM (Food–Drink–Milk) sector. Composting process represents an effective use of grape pomace. Introduced experiment deals with monitoring of the composting process of grape pomace provided by 2 different variants of different composition of composting piles. Obtained results indicate that dynamics of process is affected by the share of raw materials. According to the temperature curve characteristics, the temperature above 45 °C for at least 5 days was necessary for compost sanitation. Such temperature was achieved in piles with higher proportion of pomace (Var.II). Analysis of results shows that the compost made of grape pomace is a quality organic fertilizer, which may have in addition to agronomic point of view also great hygienic and ecological importance.
The main goal of sowing is the distribution of seeds at an optimal depth with adequate seed spacings. The results of the optimal sowing, in both horizontal and vertical directions, are better germination and sprouting, as well as increased yield and reduced infl uence of plants on each other's space for growing, regarding the available light, nutrients and moisture. Quality of horizontal and vertical seed distribution is infl uenced by the distance between rows, sowing depth, pre-sowing preparation, seed drill, seeding mechanism, sowing density, and operator's skills. The arithmetic mean of spacing (Am), standard deviation for spacings between the plants (SD) and coeffi cient of variation (CV) are usually used for representation of sowing evenness. Assuming that the seeds are of good germination quality, the yield is directly dependent on the sowing quality and organization of plants per unit of surface area. A well prepared plot was sown with 20 corn seed hybrids from diff erent FAO maturity groups. The sowing was performed with precision pneumatic seed drill INO Becker Aeromat 2, which ejects individual seeds by using the overpressure.A er sprouting, no statistically signifi cant diff erences were found between the sowing of hybrids from diff erent FAO maturity groups and their characteristics. When the yield is concerned, biological characteristics of hybrids are much more infl uential than the quality of sowing. This is true only if the tractor implement for wide row planting is properly adjusted.
Organic matter is one of the key factors with a direct impact on the soil fertility. The lack of availability of organic matter and its lack in the soil represent a current pan-European problem. Organic matter in soil plays an unmistakable role in formation of soil and improvement of the physical properties, such as soil water retention, bulk density, soil aggregation capacity, water and air mode of soil, etc. This article discusses the evaluation of influence of compost and compost with Lignohumax applied in the treated strip on changes of selected physical properties of soils. The experiments started in 2017 at two experimental sites in Lednice and Velké Bílovice (Czech Republic). The physical state of the soil was determined by using "Kopecky physical cylinders", the soil structure, moisture and penetrometer resistance were evaluated as well. The obtained results show that the bulk density reduced at both sites ranged from 1.38-1.49 g•cm-3 , the total porosity ranged from 44.09-48.25 % and the water content and aeration of the soil were roughly at the same level. The structure of the soil evaluated according to the structural coefficient was found at Lednice at the beginning of the vegetation 0.71, at the end of the vegetation, after the compost incorporation the values were higher for the variants with the prepared compost (1.38-1.44). At the site of Velké Bílovice the initial values were 0.87 and for the fertilized variants the coefficient increased to 1.99. In addition, the water conditions were better for the fertilized variants at the Lednice station and reached the level of 16.24-17.05 % by weight, while at the site of Velké Bílovice they reached the level 19.46-23.02 % by weight. The penetrometric resistance values did not exceed critical limits for the fertilized variants. In the framework of sustainability, viticulture will address issues related to soil fertility in the upcoming period. Greater attention therefore has to be paid to the replacement of traditional fertilizers, such as manure, by the new fertilizers in the form of compost or digestate.
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