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The characteristic and evaluation of the ecopedological physicomechanical indexes of the Central Moldavian agroecosystems


Author: Macrii Lucia
Degree:doctor of agriculture
Speciality: 06.01.15 - Agroecology
Year:2018
Scientific adviser: Valentin Ungureanu
doctor habilitat, professor, Agrarian State University of Moldova
Scientific consultant: Valentina Andriucă
doctor, associate professor (docent)
Institution: Agrarian State University of Moldova

Status

Term of presenting of the thesis 27 December, 2018

Abstract

Adobe PDF document1.30 Mb / in romanian

Thesis

CZU 631.58 : 631.431(478)(043.2)

Adobe PDF document 3.84 Mb / in romanian
193 pages


Keywords

ecopedological physico-mechanical indexes, agrophysical indexes, agroecosystems, crop rotation, monoculture, soil tillage, human impact, energy efficiency

Summary

Structure of the thesis: introduction, 5 chapters, conclusions and recommendations, bibliography from 213 sources, 9 attachments (with 45 tables), 120 pages of the basic text, 31 figures, 37 tables. The results have been published in 8 scientific papers.

Field of study: 411.10 – Agroecology.

Purpose and objectives of the work. Researching, highlighting and assessing changes of the physical and physico-mechanical soil indexes, agroecosystems productivity with diverse human impact for identification technological elements capable to avoid and alleviate their degradation, with increasing the energy efficiency of agroecosystems.

Novelty and scientific originality. The physico-mechanical and agro-physical soil indexes were studied in dynamics in crop-rotation links, under various technologies. For the first time in the long-term crop-rotation and corn-monoculture from DES „Chetrosu” were evaluated the energy efficiency of agroecosystems depending on the applied technology by using energy conversion method.

The important scientific solved problem. It was confirmed that the physical and physicomechanical soil properties can serve as diagnostic indexes of agroecosystems soil degradation trends under different anthropic impact levels. Based on the research it has been found the positive role of minimizing soil tillage on the physico-mechanical and agro-physical soil properties, accompanied by decreasing of technological energy inputs, that subsequently have contributed to the self-sustaining capacity of agroecosystem expressed through greater energy efficiency.

Theoretical significance. The physical and physico-mechanical indexes are important diagnosis parameters of soil degradation processes in agroecosystems. There were established the physical and physico-mechanical parameters that ensure functioning and maintenance the longterm soil production capacity, which positively influences the self-sustaining of agroecosystems and the ecological balance. The data bank on agrophysical and physico-mechanical properties was created under various agrocenoses and agricultural impacts.

Aplicative value of the work. The obtained results provide scientific support in promoting sustainable agroecosystems, conservative soil tillage systems. The materials can be used in educational and scientific activities.

Implementation of scientific results. Scientific research results are implemented in household S.R.L.”CIMCAZAC” the village Cimișeni, district Criuleni on area of approx. 230 ha.