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Vermicompost affects growth, nitrogen content, leaf gas exchange and productivity of pepper plants

100%

Berova M., Pevicharova G., Stoeva N., Zlatev Z., Karanatsidis G.

Journal of Elementology

2013

tom 18

nr 4

The purpose of this study was to investigate the effect of the vermicompost Lumbrical, produced by the Californian earthworm Lumbricus rubellus, on growth, nitrogen content, leaf gas exchange and productivity of pepper plants (cv. Gorogled 6). The experiments were carried out in 2007-2009, on experimental field of the Agroecological Centre of the Agricultural University of Plovdiv (Bulgaria). Immediately before planting, two levels of the vermicompost were applied: 50 and 100 cm3 per plant. Thirty days after planting, some of the plants fertilized with 50 cm3 Lumbrical (the third variant) were additionally fed with a solution of vermicompost (200 cm3 per plant). Prior to the experiment, chemical and microbiological analyses were performed on both the soil and vermicompost. During plant vegetation, some biometrical indices characterizing the plant growth were measured. The nitrogen concentration and nitrate reductase activity in leaves of pepper plants were determined. The leaf gas exchange was taken into account. The pepper yield and quality parameters of fruits were analyzed. The results of the present study showed that by feeding the pepper with the vermicompost Lumbrical it was possible to increase the plants’ vegetative mass improve the development of their generative organs. Incorporation of the vermicompost into the soil increased the content of N in the root area. It also considerably raised the nitrogen content in leaves of pepper plants. A positive correlation between the content N in leaves and the activity of the enzyme called nitrate reductase was observed. The positive effect of the vermicompost was reflected by improved leaf gas exchange parameters and productivity of plants.

Influence of biofertilisers on the vegetative growth, mineral content and physiological parameters of pepper (Capsicum annuum L.) cultivated under organic agriculture conditions

100%

Vlahova V., Popov V., Boteva H., Zlatev Z., Cholakov D.

Acta Scientiarum Polonorum. Hortorum Cultus

2014

tom 13

nr 4

In recent years, biofertilisers have emerged as a promising component of an integrated nutrient supply system in agriculture. The objective of this study was to examine the influence of selected biofertilisers on the vegetative growth, the content of N, P2O5 and K2O in the leaves and stems, and on the physiological parameters of pepper of the variety of ‘Sofiiska Kapiya’ cultivated under organic agriculture conditions. This experiment was carried out from 2009 to 2011 on the experimental fields of the Agroecological Centre at the Agricultural University-Plovdiv (Bulgaria), situated on the territory of a certified ecological farm. The study included the following biofertilisers – Boneprot, Lumbrical, Baikal EM “Effective Microorganisms”, Emosan, and Bio One. The results of the biometric measurements of the average plant height at the end of the vegetative period showed the highest values for the variant treated with Emosan on the Boneprot basic fertilisation (62.60 cm – 2009; 64.80 cm – 2010, and 63.87 cm – 2011). Upon feeding with the biofertilisers Emosan and Baikal EM on basic fertilisation with Boneprot (2009, 2010 and 2011) at the pepper mass fruit yield stage, plants showed higher values of net photosynthesis (PN) that were also similar to the high values observed in the flower bud stage. The highest intensity of transpiration (ȿ) was observed for the variants treated with the biofertilisers Baikal EM (2009 and 2011) and Emosan (2010) on basic fertilisation with Boneprot. It was concluded that the feeding with Emosan stimulated the vegetative growth of the pepper plants due to the high concentrations of nutrient-providing proteins contained in this biofertiliser. The results showed that biofertilisers do not significantly impact the P content of the pepper leaves and stems, but changes were more obvious in the leaves. The fertilisation with the studied biofertilisers increased the K2O content in leaves and stems compared to the control (non-fertilised) plants; the values were higher for the leaves.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Journal of Elementology

2 Zlatev Z.

1 Berova M.

1 Boteva H.

1 Cholakov D.

1 Karanatsidis G.

1 Pevicharova G.

1 Popov V.

1 Stoeva N.

1 Vlahova V.

1 2014

1 2013

Wyniki wyszukiwania

Vermicompost affects growth, nitrogen content, leaf gas exchange and productivity of pepper plants

Influence of biofertilisers on the vegetative growth, mineral content and physiological parameters of pepper (Capsicum annuum L.) cultivated under organic agriculture conditions