StatusThe thesis was presented on the 30 May, 2006
Approved by NCAA on the 29 June, 2006
Abstract– 4.30 Mb / in romanian
3.13 Mb /
This work is devoted to the problems of maintenance of high efficiency of agricultural crops and preservations of fertility of soil at insufficient humidifying and fertilizing.
As a result of the lead researches for the first time in Moldova on the big set of cultures the opportunity of application of three water saving receptions of the irrigation has been proved, what allows to raise the efficiency of use of atmospheric precipitation, soil moisture and irrigating water. Sizes of the shortage of the crop at application of modes of an irrigation with insufficient water delivery in comparison with optimum are determined, their economic and power analysis is given, the priority of methods of the water-savings for each culture is shown. Dependences "water - crop", "fertilizing - crop" which can be used for calculation of norms of fertilizing and terms of carrying out of irrigations at cultivation of programmed crops are established. Complex of experiences and their carrying out in a crop rotation with imposing of backgrounds has allowed to determine the degree of influence of investigated factors on fertility of ordinary chernozem, efficiency of crops and quality of the crop. For the first time the estimation of technologies of irrigation nas lead with use of seven criteria of optimization - crop, irrigating norm, infiltration of rainfalls, factors of total evaporation and efficiency of irrigation, net profit and power balance.
The basic offers to manufacture are included in « Recommendations to the irrigation mode of
vegetable cultures in Moldova » (1991) and in recommendations «Irrigation of agricultural crops at
deficiency of water and material resources » (2005). Results of researches are also used at lecturing
on faculty « Knowledge about soil, geology and geography » at the Kishinev State University.