Wednesday, November 15, 2006

Uptake of Nutrients by Fodder Soybean Genotypes Fertilized with Poultry Manure.

Robert Dadson, Univ. Of MD-E.Shore, Dept of AG, Princess Anne, MD 21853-1299, Iqbal Javaid, Univ.of Maryland Eastern Shore, Dept. of Agric., Princess Anne, MD 21853, Fawzy M. Hashem, Univ of Maryland Eastern Shore, Dept of Agriculture, Trigg Hall, Princess Anne, MA 21853, Thomas Devine, BARC-W,USDA ARS, SASL, Beltsville, MD 20705, and Jagmohan Joshi, Univ of Maryland Eastern Shore, 1310 Foggy Bottom Dr, Salisbury, MD 21804.

The application of poultry manure in crops is a widely used practice.  However, it has been emphasized that poultry manure application should not adversely affect the environment. The major concern has been the movement of P and N from soils receiving manure applications into ground waters, drainage ditches and ponds and subsequently causing degradation of aquatic systems. We evaluated eleven fodder soybean genotypes to explore their potential for the removal of nutrients from soils that had received heavy amounts of poultry manure. The field experiments were conducted for a period of two growing seasons crop and were arranged in randomized complete block designs with four replications. Harvesting of the genotypes was done at pod formation stages and the biological yields were recorded after the harvested samples had dried. The plant samples were analyzed for nutrient contents after grinding. The results showed significant differences in the nutrients uptakes by various fodder soybean genotypes. Soybean genotype 0 91734 extracted significantly higher amounts of P, K, Ca   and S compared with other genotypes. Also the same genotypes extracted significantly more total nitrogen percentage. Some of the fodder soybean genotypes seem to have more potential of nutrient uptake from soils with heavy poultry manure applications than the soybean varieties grown for seed. The fodder soybean could play an important role in the nutrient management which is highly desirable from the ecological point of view.