Effect of mineral and organic fertilization of alfalfa on some seed yield characteristics, root biomass accumulation and soil humus content

Vasileva, V.; Kostov, Ognyan

doi:10.5937/aaser1539051v

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…The biochemically active nature of humic acid works to enhance formation of root mass as well. Soil humus was found to be humic type of humus for both areas of alfalfa grown for forage and seeds (Vasileva and Kostov 2015b). The leached chernozem soil subtype (Haplic) without irrigation over five consecutive years.…”

Section: Resultsmentioning

confidence: 97%

Performance of oats (Avena sativa) in response to preceding alfalfa (Medicago sativa) on mineral fertilization versus organic manuring on Chernozem soil

Vasileva¹,

Kostov²

2023

Indian J Agri Sci

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Residual effect of crops on the performance of succeeding crops is well documented, but their comparisons through inorganic fertilization versus organic manuring is conspicuously missing. In this background, grain and straw oats (Avena sativa L.) yield in response to mineral versus organic manures on alfalfa grown soil was studied in field trial in the Institute of Forage Crops, Pleven, Bulgaria. Alfalfa (Medicago sativa L.) was used for forage (4 years) and seeds (3 years), and fertilized with mineral nitrogen fertilizer in form of ammonium nitrate and well matured cattle manure. Productivity of oats was influenced by both, type of fertilization and whether or not grown alfalfa grown as predecessor. When oats was cultivated after alfalfa for forage, grain yield of oats was higher by 18.68% and 9.84% for straw as compared to alfalfa for seeds. Alfalfa for forage appeared to be better predecessor, and more tolerant with regard to productivity of the next crop such as oats in comparison to alfalfa for seeds. The applied manure as organic fertilizer have long lasting (4 years) positive effect on both yields of experimented crops and soil fertility.

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Section: Resultsmentioning

confidence: 97%

Performance of oats (Avena sativa) in response to preceding alfalfa (Medicago sativa) on mineral fertilization versus organic manuring on Chernozem soil

Vasileva¹,

Kostov²

2023

Indian J Agri Sci

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“…The mineral nitrogen concentrations quantified in our study failed to explain the observed differences in nitrogen fixation, as nitrate concentrations did not decrease in accordance with the observed increase in Ndfa. With available nitrogen levels in our samples being high enough to meet plant nitrogen demands (Vasileva and Kostov, 2015), it seems unlikely that changes in soil nitrogen cycling were responsible for the increased Ndfa. However, past studies indicate that the impact of antibiotics on soil processes typically declines with time (Cui et al, 2014; Chessa et al, 2016).…”

Section: Discussionmentioning

confidence: 97%

Symbiotic Nitrogen Fixation in Soil Contaminated with the Veterinary Antibiotics Oxytetracycline and Sulfamethazine

et al. 2019

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Veterinary and growth-promoting antibiotics are widely used in animal husbandry and accumulate in manure-fertilized soils. However, the impact of these antibiotics on symbiotic nitrogen fixation is poorly understood. We investigated the effect of the veterinary antibiotics oxytetracycline and sulfamethazine, and a combination of both, on nitrogen fixation in alfalfa (Medicago sativa L.) inoculated with Sinorhizobium meliloti. In a pot experiment, M. sativa was grown in soils fertilized with fresh manure that contained environmentally relevant antibiotic concentrations (0.2, 2, and 200 mg kg −1 ). Nodulation, nitrogen fixation, and nutrient concentrations were determined in the alfalfa plants and soils after 12 wk. Compared with the antibiotic-free control, symbiotic nitrogen fixation increased significantly in soils mixed with manure containing 2 and 200 mg kg −1 oxytetracycline (20.1 and 20.8% increase, respectively) and a mixture of 200 mg kg −1 oxytetracycline and sulfamethazine (12.4% increase). The measured plant-and soil-related parameters failed to explain the observed increase in nitrogen fixation. However, using concentration levels that accurately reflect common agricultural practices, we obtained results that directly contradict other experiments conducted under unrealistically high antibiotic concentrations.

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“…Field trials supposed to enable selection of the most successful genotypes which is critical because of the existence of Genotype by Environment interaction . To assess this interaction we are forced to conduct field trials in several environments and/or years (Vasileva, Kostov, 2015;Babić et al ., 2019;Ugrenović et al ., 2019;Mandić et al ., 2020) .…”

Section: Alfalfa Yieldmentioning

confidence: 99%

Influence of amelioration on the productivity of alfalfa on acid soil types vertisols

Stojiljković¹,

Rajičić²,

Terzić³

et al. 2021

Selekcija i semenarstvo

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Alfalfa is the most important forage legume in our agroecological conditions for feeding cattle. In the area of Jablanica district, alfalfa occupies a considerable place in the total plant production. The restrictive factor in the establishment and short durability of alfalfa stand is the low pH of arable agricultural soil. Within the three-year field trial on Vertisol soil type (pH in KCl 4.9), from 2016 to 2018, alfalfa plot yield has been analyzed with different fertilization variants. The research results indicate that alfalfa provides a significantly higher yield on the plot where amelioration measures were applied, through the application of limestone and manure, with the addition of mineral fertilizer. A barely lower yield was achieved on the calcified and manured plot, while the lowest yield was on the control plot, where a generous amount of mineral fertilizer was added, which is a common practice of agricultural producers in the area of Jablanica district.

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Effect of mineral and organic fertilization of alfalfa on some seed yield characteristics, root biomass accumulation and soil humus content

Cited by 6 publications

References 20 publications

Performance of oats (Avena sativa) in response to preceding alfalfa (Medicago sativa) on mineral fertilization versus organic manuring on Chernozem soil

Performance of oats (Avena sativa) in response to preceding alfalfa (Medicago sativa) on mineral fertilization versus organic manuring on Chernozem soil

Symbiotic Nitrogen Fixation in Soil Contaminated with the Veterinary Antibiotics Oxytetracycline and Sulfamethazine

Influence of amelioration on the productivity of alfalfa on acid soil types vertisols

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