Change in time of agrochemical soil parameters after tomato mineral fertilization

The paper presents the results regarding the effect of different NPK fertilization doses on change, during three years of agrochemical soil parameters after tomato mineral fertilization. The following agrochemical indicators were analyzed: pH, humus, total nitrogen, mobile phosphorus and mobile potassium content. The experience was done in a cambric cernosium soil, with low acidity reaction, very good content in nitrogen, phosphorus and potassium and the high natural fertility potential favorable vegetables cultivation in Romanian Western Plain area. The experimental field is located in temperate climatic area, characterized by Koppen classification in the formula Cfbx. The study was performed on control soil samples (without fertilizers) and soil samples after differentiated NPK fertilization in variable dozes: N30P30K30, N45P45K45, N60P60K60 and N120P60K60. Tomato fertilization with mineral fertilizer determines, in time, significant modifications of agrochemical soil parameters. To preserve the soil quality must find the optimum dose of NPK fertilizer in tomato crop fertilization

Biological fixation of the nitrogen (NFB) in the temporary grasslands with Festuca rubra L.

In the conditions from our country, even Festuca rubra is a well spread species in the permanent grasslands from mountains it was less studied in different structures of mixtures for the setting of the temporary grasslands. From this point of view the realised researches had as main purpose the estimation of the fixation capacity of the biological nitrogen (NFB) in the framework of the studied floristic structures. The experiment consisted of a bi-factorial experiment, with the following factor graduations: A- Mixture types: a1 = Festuca rubra L. (100%); a2 = Festuca rubra L. (60%) + Trifolium repens L. (40%); a3 = Festuca rubra L. (60%) + Lotus corniculatus L. (40%); a4 = Festuca rubra L. (60%) + Trifolium repens L. (20%) + Lotus corniculatus L. (20%) and B- Nitrogen rates: b1 = N0; b2 = N50; b3 = N100. The mixtures of Festuca rubra L. and of the legume species we studied produced between 14.03 and 52.25 kg of NFB per ha per year. With no nitrogen fertilisation, the amount of NFB ranged between 14.03 and 48.01 kg/ha/year. The largest amounts of NFB were produced by the complex mixture, where the share of legumes and of dry matter also was higher than in the other types of mixtures we analysed

The effect of mineral fertilization on heavy metals content in tomato fruit

The goal of our study was to investigate the effect of different mineral fertilization doses on the heavy metals content (Fe, Mn, Cu, Zn, Ni, Co, Cr, Pb and Cd) in tomato fruit grown in uncontaminated area. The heavy metals bioaccumulation rates have also been investigated. The experience was done in a cambric cernosium soil, with low acidity reaction, very good content in nitrogen, phosphorus and potassium and the high natural fertility potential favorable vegetables cultivation in Romanian Western Plain area. Also, this soil is very rich in iron, zinc, cooper and cobalt but fall below acceptable parameters under the laws of our country. The study was performed on control soil samples (without fertilizers) and soil samples after differentiated NPK fertilization in variable dozes: N30P30K30, N45P45K45 , N^P«,!^, and N12oP6oK6oAlthough the soil analyses showed the presence of cobalt, chromium and lead in certain concentrations, except for cadmium which is not detectable, in tomatoes grown in the investigated area these heavy metals not found. Other micronutrients were very low values, well below the legal maximum allowed in vegetables cultivated in Romania. These results suggest that this area is favorable to ecological vegetables crops

The effect of mineral fertilization on heavy metals content in tomato fruit

The goal of our study was to investigate the effect of different mineral fertilization doses on the heavy metals content (Fe, Mn, Cu, Zn, Ni, Co, Cr, Pb and Cd) in tomato fruit grown in uncontaminated area. The heavy metals bioaccumulation rates have also been investigated. The experience was done in a cambric cernosium soil, with low acidity reaction, very good content in nitrogen, phosphorus and potassium and the high natural fertility potential favorable vegetables cultivation in Romanian Western Plain area. Also, this soil is very rich in iron, zinc, cooper and cobalt but fall below acceptable parameters under the laws of our country. The study was performed on control soil samples (without fertilizers) and soil samples after differentiated NPK fertilization in variable dozes: N30P30K30, N45P45K45 , N^P«,!^, and N12oP6oK6oAlthough the soil analyses showed the presence of cobalt, chromium and lead in certain concentrations, except for cadmium which is not detectable, in tomatoes grown in the investigated area these heavy metals not found. Other micronutrients were very low values, well below the legal maximum allowed in vegetables cultivated in Romania. These results suggest that this area is favorable to ecological vegetables crops

Evaluation of iron content in the grain of some winter wheat cultivars

The purpose of the research is to follow the influence of the biological factor on iron content of nine varieties of winter wheat: Alex, Potenzial, Soissons, Kalango, Apache, Kristina, Lovrin 34, Chevalier and Panonnikus. Two of these (Potenzial, Chevalier) are of German origin, three (Apache, Kalango, Soissons) of French origin, one (Kristina) of Yugoslavian origin, one of Austrian origin (Panonnikus) and two (Alex and Lovrin 34) were created at S.C.D.A Lovrin, Romania. The experimental field was placed on a cambic chernozem in Timisoara (west of Romania) in 2010, and the fertilization level was N120P60K60. Quality parameters monitored were: moisture, protein content, hectolitre mass and iron content. Variation in the iron content of different winter wheat cultivars was found in this study. Soissons winter wheat cultivar registered the highest value of iron content (54.3 mg/kg dry matter) followed by Kristina (52.07 mg/kg dry matter) and Kalango (50.45 mg/kg dry matter) winter wheat cultivar. Potenzial and Apache winter wheat cultivars registered the lowest values of iron content: 21.29 (mg/kg dry matter) and 20.5 (mg/kg dry matter), respectively

Mineral content of different winter wheat cultivars

In the present study the contents of Cu, Mn and Zn were investigated in the grains of different winter wheat (Triticum aestivum L.) cultivars. The nine varieties of winter wheat were: Potenzial, Kalango, Apache, Soisson, Kristina, Chevallier, Panonnikus, Alex and Lovrin 34. The experimental field was placed in 2009-2010 agricultural year, on a cambic chernozem in Timisoara (west of Romania) with the fertilization level N120P60K60. For this goal, the mineral elements mentioned were quantified by Atomic Absorption Spectrophotometry (AAS) and for their determination was used the atomic absorption spectrophotometer’s contr AA 300, Analytik Jena. The high contents of Cu were registered by Kalango, Panonikus and Soisson winter wheat cultivars and the lower contents by Potenzial and Apache. Regarding Zn content, Soisson had the greatest value and Apache the lowest value of this parameter. With the exception of Apache winter wheat cultivar, all the varieties registered high values of Mn content. Results of our study demonstrated that mineral content for winter wheat cultivars is strongly influenced by the biological factor

Change in time of agrochemical soil parameters after tomato mineral fertilization

The paper presents the results regarding the effect of different NPK fertilization doses on change, during three years of agrochemical soil parameters after tomato mineral fertilization. The following agrochemical indicators were analyzed: pH, humus, total nitrogen, mobile phosphorus and mobile potassium content. The experience was done in a cambric cernosium soil, with low acidity reaction, very good content in nitrogen, phosphorus and potassium and the high natural fertility potential favorable vegetables cultivation in Romanian Western Plain area. The experimental field is located in temperate climatic area, characterized by Koppen classification in the formula Cfbx. The study was performed on control soil samples (without fertilizers) and soil samples after differentiated NPK fertilization in variable dozes: N30P30K30, N45P45K45, N60P60K60 and N120P60K60. Tomato fertilization with mineral fertilizer determines, in time, significant modifications of agrochemical soil parameters. To preserve the soil quality must find the optimum dose of NPK fertilizer in tomato crop fertilization

Biological fixation of the nitrogen (NFB) in the temporary grasslands with Festuca rubra L.

In the conditions from our country, even Festuca rubra is a well spread species in the permanent grasslands from mountains it was less studied in different structures of mixtures for the setting of the temporary grasslands. From this point of view the realised researches had as main purpose the estimation of the fixation capacity of the biological nitrogen (NFB) in the framework of the studied floristic structures. The experiment consisted of a bi-factorial experiment, with the following factor graduations: A- Mixture types: a1 = Festuca rubra L. (100%); a2 = Festuca rubra L. (60%) + Trifolium repens L. (40%); a3 = Festuca rubra L. (60%) + Lotus corniculatus L. (40%); a4 = Festuca rubra L. (60%) + Trifolium repens L. (20%) + Lotus corniculatus L. (20%) and B- Nitrogen rates: b1 = N0; b2 = N50; b3 = N100. The mixtures of Festuca rubra L. and of the legume species we studied produced between 14.03 and 52.25 kg of NFB per ha per year. With no nitrogen fertilisation, the amount of NFB ranged between 14.03 and 48.01 kg/ha/year. The largest amounts of NFB were produced by the complex mixture, where the share of legumes and of dry matter also was higher than in the other types of mixtures we analysed