Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
157 0 |
SM ISO690:2012 CIOCHINA, Vitalie, LUNGU, Vasile. Modification of carbonated chernozem agrochemical indices under influence of systematic application of mineral fertilizers in Moldova. In: Scientific Papers. Series A. Agronomy, 2017, nr. 1(60), pp. 53-56. ISSN 2285-5785. |
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Scientific Papers. Series A. Agronomy | ||||||
Numărul 1(60) / 2017 / ISSN 2285-5785 /ISSNe 2285-5807 | ||||||
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Pag. 53-56 | ||||||
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Rezumat | ||||||
The paper presents the main agrochemical indexes changes: humus content, nitrate nitrogen reserves, mobile phosphorus and exchangeable potassium content in chernozem carbonated (calcareous) from south of Moldova in the period 1965 - 2015. Statistically processed data allowed to determine the dynamics of nitrogen indices with different norms: 0 - 60 - 90 - 120 - 180 kg/ha on various phosphorus funds: 1.0 - 1.5 - 2.5 - 3.5 mg/100 g of the soil. On the control variant was established that humus content decreased from 3.8% to 3.4%, nitric nitrogen reserves in soil layer of 1 m under winter wheat and maize were 67 - 102 kg/ha and decreased at the harvest to 42 - 84 kg/ha. Mobile phosphorus content decreased from 1.5 to 1.2 mg/100 g soil. Potassium exchangeable content remained at a high level of 27 - 32 mg/100 g soil. The systematic application of mineral fertilizers showed the following changes of agrochemical indices: the initial humus content was 3.8% and decreased to 3.3%, nitrate nitrogen reserves were 112 161 kg/ha in the spring and decreased insignificantly at harvest with 7 - 19 kg/ha. The mobile phosphorus content varied in dependence of applicable fertilizes norms. The exchange able potassium content slightly increased - on average by 2 mg/100 g soil. |
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Cuvinte-cheie soil, fertilizers, Field Crops, nutritive regime, agrochemical indices |
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