The influence of period of sowing of winter fodder pea variety of tuber - formation and plant residues content for improving soil fertility

Pachev, Ivan and Raykov, Svilen and Dimitrov, Ivan and Spasova, Dragica (2010) The influence of period of sowing of winter fodder pea variety of tuber - formation and plant residues content for improving soil fertility. Годишен Зборник 2010 - Yearbook, X. pp. 119-126. ISSN 1409-987X

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Abstract

The study of plant - microbial associations is important for the development of modern farming and environmental ecology. In the process of the gradual reduction of import quantities of mineral fertilizers and pesticides to increase the plants productivity and yield it is necessary to activate the agrocenoses biological components, where learning about the legume bean - rizobial symbiosis nitrogen - fixation, mobilization and provision of the plants with environmentally safe biological nitrogen ant its storage in the soil are the reasons for constant researches and experiments.
The purpose of this study is to determine the influence of the period of sowing on the development of the root mass, tuber -formation, the amount of post - harvest residues and soil agrochemical composition of winter fodder peas. the experiment is made in the period of 2005 to 2008 in Pleven EFC with the method of random block system. The result show that in the first sampling maximum number of tubers (26.62 g plant) and root dry weight (1.55 g/plant) were formed in a second sowing period (10-15 October), but with the greatest amount of post - harvest residues (435.5 kg/ha) are those of the a third period (25 - 30 October). After the harvest and the secondary growing of peats the indicators value are lower by 76,2, 30.2 and 61.6%.
The agrochemical soil analysis shows pronounced trends in mineral nitrogen and organic carbon content under the influence of different sowing periods. The soils where the plants are harvested from later sowing time are characterized with high nitrogen and carbon content determined by the larger root volume and post - harvest residues in these terms. After the pea harvest the current and potential soil acidity values decreased by 2.7 and 5.5 percent compared with the control variant.

Item Type:	Article
Uncontrolled Keywords:	peas, symbiotic nitrogen - fixation, plant residues, root mass
Subjects:	Agricultural Sciences > Other agricultural sciences
Divisions:	Faculty of Agriculture
Depositing User:	Dragica Spasova
Date Deposited:	26 Nov 2012 12:19
Last Modified:	19 Jun 2013 11:29
URI:	https://eprints.ugd.edu.mk/id/eprint/1865

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