Browsing by Author "Harciuc, Oleg"

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Beneficiile fenomenelor sinergice în protecția plantelor cu aplicarea preparatelor biologice
(CEP USM, 2024) Voloșciuc, Leonid; Șcerbacova, Tatiana; Stîngaci, Aurelia; Pînzaru, Boris; Samoilova, Anna; Harciuc, Oleg; Zavtoni, Pantelimon; Lungu, Andrei; Crucean, Ștefan; Curiev, Loredana; Chistol, Marela
The biological protection of plants through various ecological approaches, the significant diversity of the means used (entomophagous organisms, biological preparations, biologically active substances) and their high biological and economic effectiveness, managed to attract substantial attention and gained a high degree of recognition both among the specialists of highly qualified, as well as agricultural producers, regardless of the form of ownership. The effectiveness of applied biological approaches and methods is also increased against the background of the increasing impact of pesticide media and the need to solve ecological problems. On the path to increasing economic efficiency, we have established the benefits of the simultaneous use of two or more biological means.
CRITICAL SOIL MOISTURE IN RAINFED SOYBEAN FIELD
(CEP USM, 2023) Harciuc, Oleg; Malii, Aliona
The content of soil moisture in different soil horizons of soybean fields in the 0-150 cm layer was studied in years with different meteorological conditions. The current forecast of the degree of aridity of the growing season is carried out according to soil moisture data in the soil layer 0-150 cm. In the sawing the critical level of soil moisture in rainfed soybean fields was 300 mm. In the pod filling stage the critical level of soil moisture in rainfed soybean fields was 200 mm.
WATER USE BY SOYBEAN VARIETIES OF DIFFERENT MATURITY GROUPS
(CEP USM, 2023) Malii, Aliona; Harciuc, Oleg
The seasonal change in soil moisture reserves in dependence on the genetic form of soybeans was studied. It has been established that the deep layers of the soil (40-150 cm) more consistently reflect the influence of the plant component than the surface ones. In 2021, water reserves decreased in the 0-150 cm layer: for the Pentata variety - by 103 mm, and for the Onika variety- by 53 mm. Thus, Onika variety (MG I) retained 50 mm more water in the field for the next season compared to variety Pentata (MG III).
Water use efficiency in biology, agriculture and sustainable development
(CEP USM, 2024-10-07) Harciuc, Oleg; Malii, Aliona
In the Republic of Moldova 2017-2023 water use efficiency in rainfed soybean fields was in the range of 0,3-0,8 g grain/kg water. Under field conditions, for the Ladutsa soybean variety, a WUE of 0,75 g of grain/kg of water was obtained with seasonal precipitation of 94 mm, which is several times less than 317 mm, considered optimal for achieving the average agricultural WUE of 0,57.