engleski

Nutritional unbalances of soils using for sugarbeet growing in Croatia

High yield of sugar beet root depends on soil well supplied by nutrients. In absence of required amount, a yield and a quality of sugar beet root decreased. We did a chemical analysis of soil samples and carried out fertilization in accordance with request of sugar beet plants. The period 1997-2000 analysis comprised 5924 ha with 1462 samples. Unbalance between soil resources and sugar beet requirements in numerous soil types was established. A large part of area had lesser supply level of calcium, potassium, phosphorus and organic nitrogen (> 50% of samples) than optimal level. This fact imposes necessity addition of such amount of fertilizer which will change a soil condition and ensure a high production of quality sugar beet root. Thus, we conducted trials where we added K and P depending on deficiency in the soil and plants requirement. Amount of Ca and N fertilizer varied. In sugar beet vegetation we observed condition of nutrients in the soil and adopted amounts in plants. At the end of vegetation we determined yield and quality of sugar beet root in three terms of harvest.

sugar beet ; fertilization

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