Effect of Organic-N Fertilizer on Growth and Some Physiological Parameters in Pepper Plants (Capsicum AnnumL.)

Abstract

The research was carried out on pepper of "Buketen 50" and "Gorogled 6" cultivars, intended for production of red pepper for grinding. Pepper plants were grown in a phytostatic chamber under controller conditions. The plants were cultivated as soil crops. For this purpose soil from the Agroecological centre at the Agricultural University of Plovdiv (holder of a certificate for ecological farm) was used. The experiment was carried out under the following scheme: 1. Control -soil (no organic fertilizer application); 2. Soil and organic-N fertilizer application. The indicated variants were formed during the pricking of the plants in phase 2-4 true leaf. For the purpose of the experiment organic-N fertilizer Emosan (authorized for use in organic farming) was attached. The fertilizer was applied at rate equivalent to 10.0 l da -1 . The results indicated that, applying organic-N fertilizer gave the vigorous plants expressed as plant height, leaves size as well as dry weight in both cultivars. The increase of dry biomass was mainly for the account of the increased mass of the above the ground organs.There was a positive effect of the fertilizer upon the functional activity of the photosynthetic apparatus /increased content of photosynthetic pigments, improved leaf gas exchange.

Physiological responses of processing tomato in organic and conventional Mediterranean cropping systems

“…The highest Ci in the organic system could well be caused by higher stomatal conductance, which allowed more CO 2 intracellular concentration. The results are in accordance with Karanatsidis and Berova (2009) in pepper. These authors reported similar trends between organic and conventional cropping systems, with higher values of Ci in organic systems than conventional ones.…”

“…1a and b in the last part of crop cycle), tried to increase the uptake of mineral nutrients from the soil through higher transpiration. Acatrinei (2010) and Karanatsidis and Berova (2009) reported a similar E trend, while different E values have been reported for tomato cultivated only in conventional systems (Campos et al, 2009;Cantore et al, 2009;Lovelli et al, 2012;Ozbahce and Tari, 2010;Patanè, 2011). However, some of these authors worked in greenhouse conditions, and Ozbahce and Tari (2010) in semi-arid conditions.…”

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“…Organic farming is one of the fastest growing sectors of agriculture worldwide. The regulation of nutrient regime in organic farming is achieved through balanced crop rotations and application of organic fertilizers such as compost, green manure and animal wastes (Karanatsidis and Berova, 2009;Brady and Well, 1999;Meludu, 2005;Odiete, et al, 2005). In the oil palm plantation, nutrients removed in the harvested crop are replaced by recycling crop residues such as empty fruit bunches (EFB) and palm oil mill effluent (POME).…”

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“…According to Pikul et al (2005), the increasing number of fruits and fruit weight due to the increasing ability of the organs to absorb nutrients, water, and energy, as well as fixation of nitrogen and CO 2 , so that the photosynthetic process would optimal in producing assimilate. High assimilate is required as energy source for the plant growth, in which a part of it is kept as food reserves (fruit), accumulation of polysaccharide compounds affect the fruit development such as length and diameter of the fruit (Karanatsidis and Berova, 2009). High carbondioxide in the plant tissues increase the photosynthetic process rate and produce more photosynthates and maximum development of endosperm, so it produce more fruits (Gardner et al, 2008).…”