Publication Date:
1962-02-01
Description:
The influence of (NH4)2SO4 on the movement of phosphorus away from a fertilizer pellet and the water solubility of the reaction products was determined at 3-, 6-, 8- and 10-week periods and the total amount of water-soluble fertilizer phosphorus in the volume of soil influenced by the fertilizer was calculated. Simultaneously, the influence of (NH4)2SO4 on growth of sugar beet tops and roots in the band vicinity and on absorption of fertilizer phosphorus was determined. The amount of fertilizer phosphorus in sugar beet tops was expressed as a function of top weight, root weight in the band volume and water-soluble fertilizer phosphorus in the volume of soil influenced by the fertilizer.Ammonium sulphate decreased the water-soluble fertilizer phosphorus remaining at the pellet site, increased the distance of movement of the phosphorus but decreased the total water-soluble fertilizer phosphorus in the band volume. The oven-dry weight of sugar beet tops was not influenced by (NH4)2SO4 but the oven-dry weight of roots in the band volume and the fertilizer phosphorus content of the tops were doubled at the 8- and 10-week periods by the addition of (NH4)2SO4. The multiple regression analysis showed that the increased root weight accounted for 71 and 87 per cent of the variability in the fertilizer phosphorus absorption at the 6- and 8-week periods respectively.
Print ISSN:
0008-4271
Electronic ISSN:
1918-1841
Topics:
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Permalink