In this article recommendations about introduction of mineral fertilizers at onions cultivation are made.
Carrying out of 1 t of a crop of bulbs makes 3,0-3,5 kg of nitrogen, 1,3 kg of phosphorus and 4,0 kg of potassium
Carrying out of 1 t of a crop of bulbs makes 3,0-3,5 kg of nitrogen, 1,3 kg of phosphorus and 4,0 kg of potassium. Therefore it is very important to pick up the predecessor favorable to onions.
The best predecessors for it – cultures under which brought big doses of organic fertilizers – a cucumber, a pumpkin. Directly under onions it is not recommended to bring organic fertilizers, differently at it increase of leaves long doesn’t stop and a bulb are formed with delay.
The onions are sympathetic on introduction of mineral fertilizers. In an initial stage of growth nitrogen and potassium is especially necessary for it, and at bulb formation potassium and phosphorus. At all this it is necessary to consider that root system though low-power, but very active. The onions are capable to acquire well phosphorus and potassium from difficult soluble connections of the soil and practically don’t need phosphoric and potash fertilizers even on soils with low security with these elements of a mineral food, forming crops about 250-300 c/hectares.
For the specified crops usually there is enough nitrogen collecting in the soil at the expense of a mineralization of a humus if only this nitrogen isn’t used by weed plants.
Onions – one of cultures of vegetable crop rotations on which it is possible to save fertilizers, especially at their shortcoming.
A.VINNIK,
Krymgosplodorodiye center.