[Influence of phosphate fertilizers on yields of agricultural crops and content of mobile phosphates in dependence on dosages of fertilizers and phosphate level of soils]
2007
Sinevich, T.G., Grodno State Agrarian Univ. (Belarus)
On the basis of results of three-year research it is shown, that for optimization of security of cereal crops by phosphorus on sod-podzolic light loamy temporarily superfluous humidified overfertilized by phosphorus soils and on soils with the average content of mobile phosphates it is necessary to apply phosphoric fertilizers which dozes are accounted in view of the content of nutritive element in soil and factor of return. It provides the maximal increase in yields. For rape, (brassica napus) which is the cultures of intensive type of nutrition, application of high (but balanced) dozes of mineral fertilizers it is necessary to recognize like optimum. Change of the content of mobile phosphates on soil middle providing by phosphorus was varied in depending on variants of experience: it decreased in variants without application of phosphoric fertilizers and at entering the moderate dozes of phosphoric fertilizers and raised in a variant with application of high dozes of fertilizers. On soil overfertilized by phosphorus the content of mobile phosphates was more stable. Even three-year refusal of application of phosphoric fertilizers did not cause essential deterioration of their phosphatic condition
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