scholarly journals PRINOS SOJE U ZAVISNOSTI OD VREMENA PRIMENE NPK ĐUBRIVA

2021 ◽  
Author(s):  
Vojin Đukic ◽  
◽  
Jegor Miladinovic ◽  
Zlatica Miladinov Mamlic ◽  
Gordana Dozet ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Cultural Practices ◽  
Weather Conditions ◽  
Fertilizer Application ◽  
Npk Fertilizers ◽  
Soybean Yield ◽  
Spring Period ◽  
Full Effect ◽  
Npk Fertilizer ◽  
The Impact

Soybean yield depends on the variety, soil, cultural practices, as well as the weather conditions in certain years. The aim of this research is to examine the impact of NPK fertilizer application in the autumn and spring period on the level of soybean yield. The highest soybean yields were achieved by applying NPK fertilizer in autumn, before the basic tillage with spring application of nitrogen fertilizer AN. Spring application of NPK fertilizers and AN increases the yield, but the effect of fertilizers is significantly less compared to autumn application. The application of nitrogen fertilizer AN increases the soybean yield, and in order for this fertilizer to show its full effect, it is necessary for the soil to be optimally provided with macroelements.

The impact of lime and organic fertilization on the growth of wild-simulated American ginseng

2003 ◽  
Vol 83 (3) ◽  
pp. 603-609 ◽  
Author(s):  
I. Nadeau ◽  
R. R. Simard ◽  
A. Olivier
Keyword(s):  
Survival Rate ◽  
Cultural Practices ◽  
Positive Impact ◽  
Growth Parameters ◽  
Organic Fertilizer ◽  
Fertilizer Application ◽  
American Ginseng ◽  
Root Mass ◽  
Red Maple ◽  
The Impact

A 5-yr experiment was undertaken in a red maple forest to evaluate the effects of lime and organic fertilizer application on the growth parameters of wild-simulated American ginseng growing on a very acidi c soil. The application of lime had a positive impact on ginseng emergence and survival rate; it also significantly increased soil Ca, as compared to no application (control). During the last years of the experiment, adding lime also increased leaf area, a s well as shoot and root mass of ginseng. Adding lime and organic fertilizer together positively affected ginseng survival rate and root mass, as compared to adding lime alone. These results indicate that liming can improve the growth and survival of Amer ican ginseng during the first 5 yr of its development in this very acidic maple forest soil. The improvement could be due, at least partly, to increased Ca content in the soil. Addition of organic fertilizer would be beneficial as long as sufficient Ca2+is provided to alleviate the Al toxicity of this soil. Thus, using such cultural practices, wild-cultivation of American ginseng, even in red maple forests, could constitute a valuable alternative to field-cultivation. Key words:

A dynamic model for the effects of soil and weather conditions on nitrogen response

1974 ◽  
Vol 82 (3) ◽  
pp. 455-467 ◽  
Author(s):  
D. J. Greenwood ◽  
J. T. Wood ◽  
T. J. Cleaver
Keyword(s):  
Dynamic Model ◽  
Nitrogen Fertilizer ◽  
Nitrate Uptake ◽  
Cultural Practices ◽  
Weather Conditions ◽  
Nitrogen Response ◽  
Plant Weight ◽  
Increment Of Growth ◽  
Growing Conditions ◽  
Parameter Values

SUMMARYA dynamic model was derived to predict crop response to nitrogen fertilizer under different soil and weather conditions. It combined formulae representing existing principles about important processes such as leaching of nitrate through soil and nitrate uptake by plant roots. Starting values were given for the initial plant weight and its nitrogen content and parameters were included for the crop's growth and rooting characteristics under optimum growing conditions. For each day the model re-calculated the distribution of water, nitrate and roots down the soil profile and the increment of growth.The validity of the model was tested by using it to forecast the effects of different weather conditions and cultural practices on the nitrogen responses of a test crop, lettuce, when grown in experiments that were entirely independent of those used to obtain parameter values for the model. It successfully predicted the effects on the general shape of the response curve of the distribution of rainfall during the growing season, the age of the plant, the depth of fertilizer incorporation and the application of the nitrogen partly as a top dressing instead of entirely as a base dressing.The model was used to develop a strategy for nitrogen fertilizer practice for lettuce in the U.K. which was found to be broadly in agreement with the results of fertilizer experiments on grower's holdings.

Response of hawkweed (Hieracium floribundum) patches to NPK fertilizer in an abandoned pasture

1981 ◽  
Vol 59 (10) ◽  
pp. 1944-1949 ◽  
Author(s):  
R. J. Reader ◽  
W. H. Watt
Keyword(s):  
Soil Fertility ◽  
Standing Crop ◽  
Important Determinant ◽  
Fertilizer Application ◽  
Experimental Results ◽  
Fertilizer Treatment ◽  
Single Application ◽  
Southern Ontario ◽  
Npk Fertilizer ◽  
The Impact

Fertilizer (336 kg ha−1 year−1 NPK) was applied to an abandoned pasture in southern Ontario to investigate the impact of changing soil fertility on the process of patch formation by hawkweeds (mainly Hieracium floribundum Wimm. and Grab.: Compositae). A single application of fertilizer was sufficient to increase the grass standing crop, reduce the hawkweed standing crop, and thereby temporarily halt the process of patch formation in areas initially dominated by grasses (mainly Poa compressa L.). Repeated (i.e., annually for 4 years) fertilization simply increased further the predominance of grasses in these areas. In dense, well-established hawkweed patches annual fertilizer treatment was essential to maintain the increased standing crop of grasses. In these dense patches even repeated fertilizer application had no effect on the standing crop of hawkweed. The experimental results clearly showed that soil fertility could influence the outcome of grass–hawkweed interactions in this pasture. Presumably soil fertility is an important determinant of the rate of patch formation by hawkweeds.

Modeling the impact of nitrogen fertilizer application and tile drain configuration on nitrate leaching using SWAT

2013 ◽  
Vol 130 ◽  
pp. 36-43 ◽  
Author(s):  
Daniel N. Moriasi ◽  
Prasanna H. Gowda ◽  
Jeffrey G. Arnold ◽  
David J. Mulla ◽  
Srinivasulu Ale ◽  
...  
Keyword(s):  
Nitrate Leaching ◽  
Nitrogen Fertilizer ◽  
Fertilizer Application ◽  
The Impact

Prospects of spring wheat cultivation in the conditions of arid Volga region

2020 ◽  
pp. 28-33
Author(s):  
Valery Genadievich Popov ◽  
Andrey Vladimirovich Panfilov ◽  
Yuriy Vyacheslavovich Bondarenko ◽  
Konstantin Mikhailovich Doronin ◽  
Evgeny Nikolaevih Martynov ◽  
...  
Keyword(s):  
Spring Wheat ◽  
Soil Layer ◽  
Weather Conditions ◽  
Volga Region ◽  
Mineral Fertilizers ◽  
Climate Conditions ◽  
Wheat Cultivation ◽  
Forest Belts ◽  
Clear Differentiation ◽  
The Impact

The article analyzes the experience of the impact of the system of forest belts and mineral fertilizers on the yield of spring wheat, including on irrigated lands. Vegetation irrigation is designed to maintain the humidity of the active soil layer from germination to maturation at the lower level of the optimum-70-75%, and in the phases of tubulation-earing - flowering - 75-80% NV. However, due to the large differences in zones and microzones of soil and climate conditions and due to the weather conditions of individual years, wheat irrigation regimes require a clear differentiation. In the Volga region in the dry autumn rainfalls give the norm of 800-1000 m3/ha, and in saline soils – 1000-1300 and 3-4 vegetation irrigation at tillering, phases of booting, earing and grain formation the norm 600-650 m3/ha. the impact of the system of forest belts, mineral fertilizers on the yield of spring wheat is closely tied to the formation of microclimate at different distances from forest edges.

Indicators of metabolism and biochemical status of blood in horses of Yakut breed in winter and spring seasons

2020 ◽  
pp. 52-65
Author(s):  
U. Khompodoeva ◽  
R. Ivanov
Keyword(s):  
Classical Method ◽  
Live Weight ◽  
Weather Conditions ◽  
The Body ◽  
Metabolic Energy ◽  
Temperature Changes ◽  
Experimental Animals ◽  
Spring Period ◽  
Biochemical Status ◽  
Adaptive Mechanisms

The results of researches on the peculiarities of metabolism in the body of horses of Yakut breed in the winter and spring periods under the environments of Central Yakutia have been presented in the article. Physiological experiments on the digestibility of the main nutrients of the feed have been carried out in the winter (February) and spring (April) periods under the environments of the physiological yard in the Yakutsk Scientific and Research Institute of Agriculture named after M. G. Safronov with using the classical method. Five mares and five geldings of Yakut breed have been selected for researches. The average live weight of mares was 378–410 kg, geldings 394–403 kg. The experimental animals had average fatness. It has been found a higher intake of energy and the main nutrients of hay as a mono feed in winter compared to the spring period. At the same time pregnant mares in winter have been consumed 103,8±3,12 MJ of metabolic energy per head/day, which was 27,3 % significantly higher than in the spring period – 75,4±2,18 MJ (P ≥ 0,999). Geldings have been consumed in the experiment 67,70±2,85 MJ, which was by 43,7 % higher than in the spring period – 38,05 ± 4,40 MJ of metabolic energy per head/day (P ≥ 0,999). Experimental animals have been housed in stalls; there was no energy expenditure for movement, so the amount of energy consumed in winter indicates the production of heat in the animal’s body. Pregnant mares per 100 kg of live weight have consumed 31,5±4,11 MJ of metabolic energy or 33,3 % more than in the spring period – 21,0±1,98 MJ; geldings have consumed 27,69±1,12, which was 41,78 % significantly higher than in the spring – 16,12 ± 0,75 MJ (P ≥ 0,999). The high intake of metabolic energy into the body of Yakut horses in winter is explained by the manifestation of adaptive mechanisms that affect the effective metabolism for survival, adapted to frequent changes in weather conditions and sharp temperature changes. The established differences in the biochemical parameters of blood serum of horses of Yakut breed are associated with changes in the consumption and digestibility of basic nutrients and energy, depending on the ambient temperature.

Influence of a BactoFil microbiological preparation on the intensity of infection by Rhizoctonia solani and the effects on sugar beet yield and quality

2012 ◽  
pp. 102-109
Author(s):  
Suzana Kristek ◽  
Andrija Kristek ◽  
Dragana Kocevski ◽  
Antonija K. Jankovi ◽  
Dražen Juriši
Keyword(s):  
Sugar Beet ◽  
Rhizoctonia Solani ◽  
Nitrogen Fertilizer ◽  
Soil Analysis ◽  
Block Design ◽  
Sugar Content ◽  
Pathogenic Fungi ◽  
Fertilizer Application ◽  
Beet Root ◽  
Set Up

The experiment was set up on two types of the soil: Mollic Gleysols (FAO, 1998) and Eutric Cambisols where the presence of pathogenic fungi – sugar beet root decay agent – Rhizoctonia solani has been detected since 2005. In a two year study (2008, 2009), the experiment was set up by completely randomized block design in 4 repetitions and 16 different variants. Two beet varieties, Belinda, sensitive to pathogenic fungi R. solani, and Laetitia, tolerant to pathogenic fungi R. solani), were grown. The microbiological preparation BactoFil was applied in different amounts in autumn and spring. In addition, the nitrogen fertilizer application, based on the results of soil analysis, was varied. The following parameters were tested: amount of infected and decayed plants, root yield, sugar content, sugar in molasses and sugar yield. The best results were obtained by applying the microbiological preparation BactoFil, and by 30% reduced nitrogen fertilizer application. Preparation dosage and time of application depended on soil properties.

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