PAPER TITLE :INFLUENCE OF COMBINED APPLICATION OF AGROLYSER AND NPK FERTILIZER USING FOLIAR AND SOIL APPLICATION METHODS ON SOIL PROPERTIES AND YIELD OF MAIZE (ZEA MAYS L.)

APPLIED TROPICAL AGRICULTURE | VOLUME 20 NUMBER 1 2015

Paper Details

  • Author(s) : Iren, O. B.
  • Abstract:

Balanced fertilization involves the application of both macro- and micro-nutrients in the right amount and proportions for optimum crop yield.
R The experiment was conducted to compare the effectiveness of sole and combined application of agrolyser (micronutrient) and NPK fertilizer using
foliar and soil application methods on soil properties and yield of maize in the humid forest zone of south-eastern Nigeria. The experiment was laid
R out in a randomized complete block design with three replications comprising of 10 treatments. The treatments were three levels of agrolyser (0.2,
-1 -1 0.3 and 0.4 kg ha ) using two methods of application (foliar spray and soil placement). Equal basal rate of NPK fertilizer (150 kg N ha , 40 kg
-1 -1 R -1 P O ha and 90 kg K O ha ) was applied to all the treatments, except the controls. The control plots had only agrolyser applied at 0.3 kg ha as 2 5 2
foliar spray and soil placement, and plots without amendment (absolute control). There was also a check plot where only NPK fertilizer was applied.
The experimental soil was loamy sand in texture, strongly acidic and low in fertility. The result shows a significant (P ≤ 0.05) increase in soil pH
R amongst treatments when compared with the absolute control. The combination of agrolyser and NPK fertilizer significantly improved the
availability of total nitrogen, available phosphorus, and exchangeable Ca and Mg in the soil. Application of NPK fertilizer alone or in combination
R R with agrolyser significantly (P ≤ 0.05) increased maize grain yield. The method and rate of agrolyser application did not significantly (P > 0.05)
increase maize grain yield. Minor differences existed between plots that received only NPK fertilizer (82 % increase over absolute control) and those
R R that received NPK fertilizer and agrolyser (84 % increase). Plots that received only agrolyser using foliar and soil placement had only 18 %
-1 -1 -1 (399.63 kg ha ) and 17 % (392.92 kg ha ) increase, respectively over the absolute control (327.87 kg ha ). It was therefore concluded that
R R agrolyser cannot be substituted for NPK fertilizer but that it could be used as a supplementary treatment to supply micronutrients. Agrolyser could
be applied either as a foliar spray or mixed with NPK fertilizer and applied directly to the soil.