Linking root production to aboveground plant characteristics and water table in a temperate bog |
| |
Authors: | Meaghan Thibault Murphy Tim R Moore |
| |
Institution: | 1. Department of Agriculture & Natural Resources, Delaware State University, Dover, DE, 19901, USA 2. Department of Chemistry, Delaware State University, Dover, DE, 19901, USA
|
| |
Abstract: | To develop agronomic application rates for alum-amended poultry litter, nutrient and Al availability of this particular organic fertilizer were examined using long-term field weathering studies. It was revealed that concentrations of N, P, K+, and Al3+ in the poultry litter leachate ranged from 5 to 6,503 mg L-1, 2 to 84 mg L-1, 2 to 5135 mg L-1, and 0.05 to 4.6 mg L-1, respectively. Release of nutrients occurred principally in the first growing season and would last for years. During 19 months of field weathering, 10.5 kg N, 1.1 kg P, 34.5 kg K+, and 0.031 kg Al3+ were released per ton of the poultry litter and recovered in the leachate. The results suggest that no Al toxicity would be generated to crops if alum-amended poultry litter is used as a fertilizer. If applied at 13.3 ton ha-1, the poultry litter will supply 150.0 kg ha-1 N, 15.2 kg ha-1 P, and 456.2 kg ha-1 K+ to seasonal crops. Application of alum-amended poultry litter at available N-based rates will meet crop nutrient requirements while minimizing nutrient runoff losses. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|