INFLUENCE OF FOLIAR APPLICATION OF ORGANIC AND AMINO ACIDS UNDER DIFFERENT RATES OF NITROGEN FERTILIZATION ON PRODUCTIVITY AND QUALITY OF SUDANGRASS UNDER SANDY SOIL CONDITIONS

ABSTRACT
Two field experiments were conducted in two successive summer seasons of 2017 and 2018 at Ismailia, Agricultural Research Station, ARC, Egypt. The experiments are aimed to study the effect of three rates of  nitrogen fertilization  (0, 60, 90 N kg/ fad) with organic and amino acids on Sudangrass cv. Giza "2" to growth, forage yield and quality of forage Sudangrass (Sorghum sudangrass L.) as well as economic return. A randomized complete blocks design with three replicates was used in the two growing seasons. The main obvious results of this study could be summarized as follows; Nitrogen application showed positive impact on studied growth traits, forage yield and quality. Increasing N rates up to 90 kg /fad + organic acid + amino acid led to the highest values of plant height, number of tillers, number of leaves, leaves/ stem ratio, fresh and dry yields for Sudangrass.
The data of nitrogen use efficiency (NUE) indicated that the application of amino acid and organic acid plus soil application was more effective than soil application on Sudangrass productivity especially by using 60 kg N/fad + foliar applications of organic acids + foliar application of amino acids which produced the highest values of NUE.
Also, the present results indicated that increasing N level fertilization led to increasing crude protein content (CP). The results also showed that treatment (90 kg N/fad + organic acid + amino acid) was up in pound dividend investor in Sudangrass crop to farms pound spent on agriculture.