Izvorni znanstveni članak
THE REACTION OF ALFALFA ON THE SULFER FERTILIZATION
Anđelko Butorac
; Poljoprivredni fakultet Zagreb
Sažetak
The basic aim of the investigations was to study the fertilizing value of sulphur,and the combined effect of sulphur and molybdenum upon the yield of alfalfa on pseudogley, in the greenhouse conditions. The fertilizing,with NPK fertilizers, which contain no sulphur, served as standard. Sulphur was applied in four grades: 30, 50, 70 and 90 kg/ha of elementary sulphur, while molybdenum was used in one grade,based on 3 kg/ha of sodium molybdate. Contrary to the results obtained by the majority of the cited investigators, which show a positive effect of sulphur both upon the yield and the chemical composition of alfalfa, primarily as regards the increase of its nitrogen content, our investigations point to an almost opposite conclusion. This is best illustrated by the results concerning yields per years (alfalfa was grown twice in the periods of two years) which are presented in Tables 1,2 and 3. As regards nitrogen,and phosphorus quantities in alfalfa, the changes are best illustrated by the data in Table 4, which show that there is absolutely no connection between the performed treatments and the phosphorus quantity in the stem and leaf, in contrast to nitrogen where there are such changes. However, the good side of the investigations is in their setting the direction for further investigations, which are made necessary by the ever increasing importance of this problem in modern agriculture, that is up to date growing of alfalfa.
Ključne riječi
Hrčak ID:
165061
URI
Datum izdavanja:
27.3.1974.
Posjeta: 700 *