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| Registros recuperados: 16 | |
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| Raupp, Dr Joachim; Oltmanns, Meike. |
| In a long-term fertilization trial particulate organic matter (POM) was investigated after 20 years of farmyard manure vs. mineral fertilization at different levels with the method of Meijboom et al. (1995). The organic matter was separated with sodium polytungstate (Magid et al., 1996; Six et al., 1999) into a light (p <1.13 g cm-3), medium (1.13-1.37 g cm-3) and heavy (p >1.37 g cm-3) fraction. The organically fertilized plots had lower contents of the light fraction (0.73 - 0.78 g kg-1 dry matter on average of all fields) compared to the mineral treatment (0.95 g kg-1 TS). This gives a hint that organic residues are decomposed faster in the manure fertilized soil, according to the higher biological activity found earlier in this treatment. The... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring. |
| Ano: 2002 |
URL: http://orgprints.org/770/1/rai02po.pdf |
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| Scheller, Dr Edwin; Raupp, Dr Joachim. |
| Since 1980 a long-term experiment has been carried out to compare mineral fertilizers (MIN), composted manure (RM) and composted manure with application of biodynamic preparations (RMBD) at three different fertilizer application rates. The total C and N contents in the topsoil were significantly different between all three fertilizer types. 42.9 to 53.7 % of Nt was bound in 18 total hydrolysable protein amino acids (THAA) including asparagine and glutamine. Amino acid contents in the hydrolysates of the topsoil were significantly different according to fertilizer type: MIN < RM < RMBD. The higher contents in manure fertilized plots were observed even at the lowest rate of fertilizer application. This indicates that differences between the treatments... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology; Composting and manuring. |
| Ano: 2005 |
URL: http://orgprints.org/3583/1/3583.pdf |
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| Raupp, Dr Joachim. |
| According to literature reports farmyard manure application caused higher amounts of microbial activity in soils compared to mineral fertilizers. If lab tests have been carried out (e.g. enzyme activity, microbial biomass) results can be attributed to soil properties, as experimental conditions have been constant. With plots of a long-term field trial it has been studied whether organic or mineral fertilization has any effect on soil temperature (depending on different crop density in each treatment) and, by this way, also on N mineralization. Soil temperature was higher in organically than in minerally fertilized winter rye, but only on sunny days, not on cloudy ones. Differences have been measured to a soil depth of 15 cm. However, N mineralization did... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil biology. |
| Ano: 1999 |
URL: http://orgprints.org/757/1/rawitabe.pdf |
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| Raupp, Dr Joachim. |
| The basic references and textbooks of organic farming describe this agricultural method as aiming at and using the benefits of a certain farm structure. Similar concepts and ideas of a farm have been described both by the pioneers of organic farming and by the pioneers of agricultural sciences, although using various terms: agricultural individuality (Steiner in 1924), self-sufficient organic whole (Lord Northbourne in 1940), the proportioned farm (Young in 1770), the farm organism (Koepf in 1976), the branches of a farm are like organs in a body (Aereboe in 1920) having a certain size and being dependent from each other (Brinkmann in 1922). The various terms, ideas and aspects are explained and compared with each other. In the 1970s and 1980s, some... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Research methodology and philosophy; "Organics" in general; Farming Systems; Farm nutrient management; Biodiversity and ecosystem services. |
| Ano: 2000 |
URL: http://orgprints.org/602/1/rafaorg.pdf |
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| Raupp, Dr Joachim. |
| Organic farms without or with a too low animal livestock try to replace farmyard manure by using plant based organic fertilizers, e.g. legume biomass as green meal or grain meal. When applying such fertilizers, it is necessary to know their nitrogen mineralisation intensity in relation to farmyard manure. In an incubation test over three weeks (25 °C, 45% maximum water holding capacity) alfalfa meal showed a lower and faba bean meal a much higher nitrate N mineralisation than farmyard manure (15 and 69 ug g-1 dry matter, respectively, compared to 25).The largest amount was released from castor meal (99 ug g-1). After one week farmyard manure had the largest N release with 28 ug g-1. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring. |
| Ano: 2005 |
URL: http://orgprints.org/3650/1/3650.pdf |
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| Raupp, Dr Joachim. |
| The total ash content is usually considered to be fairly constant during the composting period, apart from addition of minerals by precipitation and losses by seepage. However, our field trials with farmyard manure have shown that the ash fraction insoluble in hydrochloric acid increased much more than the soluble fraction in the same time. If changes are merely caused by composting intensity (e.g. organic matter degradation), both fractions should be accumulated in the same degree. It is hypothesized that the higher rise of the HCl-insoluble fraction indicates a higher amount of soil material in the heaps at the end compared to the beginning of composting, as the insoluble fraction originates mainly in soil-borne silicates while the soluble fraction is... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Specific methods. |
| Ano: 2002 |
URL: http://orgprints.org/619/1/rai02as.pdf |
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| Raupp, Dr Joachim. |
| Nutrient budgets are an important tool of farm planning. Normally the amounts of manure, feedstuffs, yields etc. as well as their nutrient contents are measured and analysed in each single case. If this is impossible for labour reasons, standard data sets of nutrient contents in agricultural products have to be used. However, these data sets have been determined in conventional farming. Thus, the question arises, whether theses results can be transferred to organically grown crops. This question was investigated with rye samples of a long-term trial with farmyard manure and mineral fertilization. In many cases the N, P and K contents in organically and minerally fertilized samples differed significantly, though one of the treatments did not always show... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Composting and manuring. |
| Ano: 2001 |
URL: http://orgprints.org/768/1/rapft01%2D2.pdf |
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| Scharfy, Deborah; Raupp, Dr Joachim; Neumann, Elke. |
| In the present study, AMF root colonisation of potato plants was compared between organically and minerally fertilised field plots, which did not significantly differ in the total amount of plant available P. The AMF root colonisation was increased in response to organic fertilisation. This indicates that organic fertilisation can enhance AMF development independently from the soil P fertilisation level. Furthermore, soil grown mycelium was trapped in fungal compartments. This technique allowed the extraction and quantification of coarse and finely branched soil grown hyphae after harvest. The soil in the fungal compartments was either fertilised with low or with high amounts of mineral P. In organically fertilised field plots, the amounts of finely... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring. |
| Ano: 2005 |
URL: http://orgprints.org/3679/1/3679.pdf |
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| Raupp, Dr Joachim. |
| Based on investigations with samples of a fertilization trial started in 1980, some parameters of storage ability are evaluated. Microbial infestation of the product during incubation seems to be the most reliable parameter. But the circumstances of infestation are as unknown as the optimal test conditions. There is no reliable correlation between results of degradation tests, storage tests under optimal conditions and chemical contents of the product. The quality concept of product vitality (product-oriented), i.e. a product full of vigour, based on results of degradation tests is discussed. Ultimately, food quality standards are based on human priorities (human-oriented). Therefore, not only product characteristics, but also social, psychological,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Specific methods. |
| Ano: 1997 |
URL: http://orgprints.org/756/1/rawita42.pdf |
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| Scheper, BSc Carsten; Raupp, Dr Joachim; Baars, Prof Dr Ton. |
| Although since 1924 the biodynamic hornpreparations (cowhorn manure and cowhorn silica) have been practically used and investigated in several doctoral theses, hardly any attention has been paid at the scientific evaluation and explanation of their effects. The results of experimental studies with the preparations are summarized. To understand their mechanism, an ecological and ecophysiological focus can be used. It shows that at several levels of the agro-ecosystem regulative mechanisms can be found. Bacterial and hormonal effects are found, if the preparations are analysed. These scientific results should be understood and discussed in relation to the anthroposophical or esoteric understanding of the biodynamic preparations. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2009 |
URL: http://orgprints.org/14401/1/Scheper_14401.pdf |
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| Raupp, Dr Joachim. |
| The effects upon soil organic matter and crop yield of applying farmyard manure, both with and without biodynamic preparations, as compared to treatments receiving mineral fertilizer (and straw) have been studied in a field trial starting in 1980. The site has a sandy orthic luvisol, 590 mm precipitation per year and 9.5̊ C annual mean temperature. Since 1985/86, crop rotation is red clover, spring wheat, potatoes and winter rye. Soil organic matter (SOM) content in the topsoil has been found to be higher with manure than with mineral fertilization. The highest SOM content of 1.00 % Corg has been observed in the treatment with biodynamic preparations. Increasing applications gave higher SOM contents only with manure, but not with mineral fertilization.... |
| Tipo: Book chapter |
Palavras-chave: Nutrient turnover; Soil biology; Composting and manuring. |
| Ano: 2001 |
URL: http://orgprints.org/635/1/0851994652Ch4.10.pdf |
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| Raupp, Dr Joachim; Oltmanns, Meike. |
| Whereas the positive effects of farmyard manure on soil biological properties have been shown in several long-term experiments, no comparable information was available for plant based organic fertilizers. Since 1996 such materials were applied with the same amount of total nitrogen as farmyard manure (100 (kg ha-1) on a poor sandy soil. In 2005 it was found that faba bean meal application caused the same potato yield, and tubers with the same phosphorus content, but lower potassium and slightly increased starch contents compared to farmyard manure. Tuber quality was similar as regards nitrate content. However, as regards crude extract darkening better values have been achieved by farmyard manure. Soil organic matter content was lower with faba bean meal... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Root crops; Composting and manuring. |
| Ano: 2006 |
URL: http://orgprints.org/7596/1/E%2Dode.doc |
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| Raupp, Dr Joachim. |
| Enzymatic browning of tubers owing to mechanical injury is assessed to indicate bad quality, mainly for visual reasons. Browning is also a serious problem during processing of potatoes. The effect of farmyard manure and mineral fertilization at three levels (50, 100, 150 kg total N per hectare) on darkening of potato extract was investigated in three years in a field trial. The extinction of the extract was measured at 400 nm for two days at three dates during the storage period from autumn to spring. The extract of organically fertilized tubers hat a lower extinction compared to the mineral treatments. This difference occurred right at the beginning of the test with the fresh extract as well as during the following two days, when darkening continued... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Specific methods Root crops Composting and manuring. |
| Ano: 2002 |
URL: http://orgprints.org/769/1/rai02ka.pdf |
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| Registros recuperados: 16 | |
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