Investigating the influence of precisely applied starter P-fertilizer in maize – initial field trial results

Abstract

To ensure quick early growth, maize requires the immediate accessibility of essential nutrients, especially since the seedlings only have a limited nutrient uptake ability. The P-supply is frequently ensured through starter fertilizer. In general, fertilizer mixes with phosphorus (P) and nitrogen (N), sulfur (S) or additional nutrients are used. Traditionally, granular fertilizer is continually applied as a fertilizer band parallel to the seed row, also between the seeds. Up to 25?% can be saved by using precisely the right amount of the fertilizer and concentrating it in the area of the single seeds. This environmentally friendly practice also saves costs. In the course of this research project, which was funded by the Federal Ministry of Food and Agriculture (BMEL), possibilities for precision fertilizer application were investigated and a technical solution sought for realizing precise sowing. This research project was carried out in cooperation with the Kverneland Group Soest. The initial field tests with diammonium phosphate verified the hypothesis of improved early growth at different sites. The field tests also verified significant growth advantages during early growth in variants treated with precisely placed starter fertilizer.