|
|
Effect of sewage sludge application on content of soil microbial biomass
Tichá, Alena ; Černý, Jindřich (advisor) ; Růžek, Lubomír (referee)
Microbial biomass plays a main role in transformations of elements. It participates in transformation biogenic elements and it is a sensitive indicator changes in soil. The conten of soil microbial biomas is not the same, during the year Application of fertilizers can improve soil properties. Sewage sludges aplication on soil can provide not only organic matter, but they can increase soil productivity an provide nutrients, which is important for plants.
In this thesis was watched effect of long-term application of sewage sludge on soil microbial bimass of carbon and nitrogen. Changes microbial biomass of carbon and nitrogen was watched on two sites Suchdol and Červený Újezd. Changes was watched under different system of fertilization. The long-term fertilization was manure, sewage sludge, NPK and unfertilized control. The samples was collected during the April, May, June and July 2014 and 2015 in March , April and June. The content of microbial biomass carbon and nitrogen was estimated by fumigation-extraction method.
On station Suchdol was in the year 2014 highest in April with sewage sludge treatment 237,52 mg C/kg. In the year 2015 was content soil microbial biomass carbon highest on manure treatment 338,90 mg C/kg. On station Červený Újezd was in the year 2014 highest content microbial biomass carbon on sewage sludge treatment 280,13 mg C/kg. The highest content microbial biomass nitrogen on Suchdol in the year 2014 was in the April with NPK treatment 23,19 mg N/kg. The maximum content of soil microbial biomass nitrogen in the year 2015 was with sewage sludge treatment 24,07 mg N/kg. On the stand Červený Újezd was highest content of soil microbial biomass nitrogen in the year 2014. It was on June with manure treatment 21,52 mg N/kg. One year later there was the highest with manure treatment 23,24 mg N/kg.
|
|
|
The effect of fertilization on yield and quality of malting spring barley
Mužík, Jiří ; Černý, Jindřich (advisor) ; Jiří, Jiří (referee)
Spring barley is the cereal with the shortest growing season and high demands on soil structure and quality of fertilization.
The experimental part of the study was carried out on the long-term stationary experiments at two sites with different soil and climatic conditions - Červený Újezd and Prague Suchdol. Experiments were established in 1996 with a crop rotation in order - potato (corn), winter wheat and spring barley. Organic fertilizers are: sewage sludge, manure and straw. Mineral fertilizers were applied directly to the barley such as phosphates, potassium fertilizers were used in autumn in the course of plowing and nitrogen fertilizer during seedbed preparation of the soil. Used mineral fertilizers are: calcium amonium nitrate, triple superphosphate and potassium salt. Spring barley is the third crop after the application of organic fertilizers and therefore uses fertilizers in the third year.
The aim of the study was to evaluate the effect of organic and mineral fertilization on yield parameters of spring barley and selected qualitative indicators. We evaluated the number of offsets, number of grains per ear, yield of grain, straw and N-substances in grain.
The number of offsets and grains per ear had the greatest influence by fertilization mineral fertilizers. The highest number of offsets was found in variant NPK Červený Újezd in year 2013 (2,357 offsets/m2) and the largest number of grains in ear at the same station in year 2014 on variant Manure 1/2 + N (24.6 grains). Yield of grains was significantly influenced by both sites and variants of fertilization. It was different in year 2013, when the higher yields were found in the station Suchdol, however yields in years 2014 and 2015 were higher at the station Červený Újezd, especially in variants fertilized with mineral fertilizers. The highest grain yield was at the station Červený Újezd variants NPK and N + straw (9 t / ha) and at the station Suchdol was the highest grain yeild on NK variant (6.1 t / ha), both cases in year 2015. Straw yield was influenced by both fertilizes mineral and organic according to influence of individual years. The highest yield of straw was found at the station Červený Újezd variant N + straw (5.6 t / ha) in year 2015 and at the station Suchdol was the highest yield on the variant N (4.3 t / ha) in year 2014.
The content of N-substances in grains of the spring barley was found to be low in all variants of fertilization in the analyzed years. Optimal values throughout the three-year experiment was achieved at the station Červený Újezd only in year 2015 on variant N (10.5%) and N + straw (10.6%) and at station Suchdol in year 2014 on variant N (10.3%) and NP (10.4%).
It was found that a propitious effect on the yield and quality of spring malting barley has fertilization by mineral fertilizers such as nitrogen, phosphorus and potassium. Fertilization by organic fertilizer has a positive effect while used in lower quality soil and climatic conditions.
|
|
|
Phosphorus fertilizing of winter wheat in long-term field experiments including the sewage sludge treatment
Burgetová, Markéta ; Kulhánek, Martin (advisor) ; Karel, Karel (referee)
The theoretical part of the work is to describe the importance of phosphorus in soils and plants, and individual fertilizing systems, which is phosphorus in the soil supplied. Currently phosphorus considered limiting element in plant nutrition and it is therefore necessary to monitor the content and add it into the soil as required. Phosphorus is applied to the soil in different sorts of fertilizers. It is possible to use organic and mineral fertilizers and waste materials, for example sludge from sewage treatment plants. Sewage sludge appears to be a rich source of organic substances and other nutrients including phosphorus. Thanks to the application of sewage sludge on agricultural land, when used properly, reflects in the improvement of soil properties.
The aim of this work is to compare different fertilizing treatments (sewage sludge, manure and mineral fertilizers) in terms of water-soluble, accessible and residual phosphorus in the soil and also in terms of the influence of the mentioned treatments on winter wheat yields. The experiment was conducted at Humpolec, Hněvčeves and Suchdol sites and the evaluation was realized between the years 1996 and 2015.
The contents of readily available phosphorus at all sites were fairly balanced and did not clearly indicate the best fertilization option. The highest values were, however, in most cases measured at the sewage sludge treatment.
Sewage sludge appeared to be good source of mobile phosphorus. The values were almost always higher in comparison to the other studied treatments. It was confirmed at all three sites. The increasing tendency in mobile soil P content was clearly visible during the experiments. Estimating of residual phosphorus was carried out in comparison with other factions only in the years 1996, 2005 and 2014. The highest levels of residual P after application of sewage sludge were achieved at Humpolec and Suchdol sites. At the station Hněvčeves, the highest content was estimated on the variant fertilized with mineral fertilizers.
Even though the sludge proved to be the best phosphorus resource in our experiments, the highest winter wheat yields were reached using mineral fertilizers. A variant fertilized with sludge appeared to be second best way, and thereafter followed farmyard manure treatment.
|
|
|
The effect of fertilization and locality on yield of spring barley
Koželuh, Josef ; Černý, Jindřich (advisor) ; Kovářík, Jakub (referee)
This Bachelor thesis is focused on evaluating the impact of fertilization of spring barley by organic and mineral fertilizers, and comparing their effects on yield and quality. The literature search sought to determine spring barley requirements for environmental factors, nutrition and fertilization, and to determine cultivation problems, such as lodging, pests and disease. As an experiment included in my thesis, I conducted the long-term field study on plant nutrition, being performed since autumn 1996 at the Department of Agro-environmental Chemistry. In this study, three crops rotate in the following order: potatoes, winter wheat, spring barely. In the area of Červený Újezd the corn is used instead of potatoes, due to the agrotechnical reasons. The study took place at five areas (Suchdol, Červený Újezd, Humpolec, Lukavec, Hněvčeves). These are areas with different soil and climatic conditions, which are used to assess the influence of habitat. The experiment was conducted under several controlled conditions. The Control area was left fertilizer-free. The variant Manure involved organic fertilization with the potato-intended manure, with estimated dosage of 330 kg N/ha. Variant Kal was also fertilized with potato-intended manure, with the same amount of nitrogen as variant Manure. Variant Manure 1/2 + N was organically fertilized by the manure at a dose of 165 kg N / ha and subsequently fertilized for spring barley at a dose 55 kg N / ha in the form of ammonium nitrate with limestone (ANL). Variant N received only mineral fertilization 70 kg N/ha with ANL. In the Variant NPK, only mineral fertilizers were used (ANL, triple superphosphate, potassium salt) with the total dosage 70 kg N/ha, 30 kg P/ha, 100 kg K/ha. Variant N+straw was fertilized with 70 kg/ha of mineral nitrogen and a straw was always plowed after harvesting spring barley. The results clearly show that Červený Újezd is the most suitable area for the cultivation of spring barely. This experiment also confirmed substantial influence of fertilizer on the quality and yield of grain, as well as the influence of the habitat. NPK variant had the highest yield and quality in most locations, hence a variant with mineral fertilizers containing three basic nutrients. From the economical view, Control variant only was evaluated. Profitable production was reached only at sites Suchdol and Červený Újezd.
|
|
|
The effect of fertilization on winter wheat yield
Šístek, Lukáš ; Černý, Jindřich (advisor) ; Sedlář, Ondřej (referee)
The aim of this work was to evaluate the effect of fertilization on different sites with different soil and climatic conditions on the yield and productivity parameters of winter wheat.
Wheat is the most widespread cereal in the Czech Republic. In the crop rotations it occupies almost half of all grain grown and about 30% of the total sown area. Its advantages, when cultivating, are the relatively stable level of yield and quality.
Long-term stationary experiments with crop rotation were established in the fall of 1996 at five sites of the Czech Republic with different soil and climatic conditions (Červený Újezd, Hněvčeves, Humpolec, Lukavec and Prague - Suchdol). In an experiment there are three crops grown in sequence: potatoes, wheat and barley. In a trial there were compared organic fertilized, mineral fertilized and combined organic with mineral fertilized plots in Červený Újezd, Hupolec and Suchdol sites. For purposes of the experiment is used sludge from WWTP in Prague. Manure and straw are used from each experimental sites. As a nitrogenous fertilizer is used ammonium nitrate with limestone, phosphorus fertilizer is triple superphosphate and potassium fertilizer is potassium salt.
From the experimental results can be clearly inferred that the lowest values of all monitored parameters were achieved on the plots fertilized only with organic fertilizers. After the addition of mineral nitrogen fertilizer the levels of monitored parameters has changed significantly and thus was achieved an increase in these parameters compared to unfertilized control plot. The highest results in relation to the winter wheat yield and quality were found in Červený Újezd and the lowest in Humpolec. The highest yield of wheat grain was found in Červený Újezd on N fertilized plot (12.28 t.ha-1). The lowest yield of wheat grain was achieved in Humpolec on manure fertilized plot (3.9 t.ha-1). However, the highest response to nitrate fertilization was found in Humpolec. The lowest increase in grain yield was 207 % and 333 % increase in yield of straw compared to the control plot. The highest use of nitrogen was determined at Červený Újezd station, where the wheat consumed most of the nitrogen supplied by nitrogen fertilizers.
|
guest ::
