|Torbert, Henry - Allen|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/11/2008
Publication Date: 3/11/2008
Citation: Adesemoye, A.O., Torbert III, H.A., Kloepper, J.W. 2008. Beneficial effects of plant growth promoting rhizobacteria in integrated nutrient management [abstract]. 2nd International Conference on Development Studies. CDROM. Interpretive Summary:
Technical Abstract: The global crave to supplement soil fertility will continue in order to achieve high crop productivity. Integrated nutrient management (INM) systems is now imperative to insure sustainability in the use of chemical fertilizers and manures. Information on integrating specific natural and man-made sources of plant nutrient and farm practices in an environmentally sound NM system is scanty. Our objective was to test different combinations of fertilizer, tillage, and inoculate types - plant growth promoting rhyzobacteria, PGPR and arbuscular mycorrhiza fungi, AMF - in an integrated system and determine which combinations best support sustainability. The study was conducted from 2005 to 2007 with field corn. We measured growth, yield, and nutrient uptake in grain and silage and estimated the interaction of factor levels. Soil wa analyized at the beginning and end of the study, while bioavailability of nutrients was measured over time, with plant root simulator (PRS) probes. Results showed hat inoculates promoted plant growth and yield. For example, grain yield (kg ha-1) in 2007 for inoculates were AMF 7,717, PGPR +AMF 7,260, PGPR 7,313, control 5,725, and for fertilizer were poultry litter 7,470, NH4NO3 6,537. Significantly higher amounts of each element (N, P, or K) were removed from the plots with inoculates compared to those without based on total nutrient content in grain per plot (e.g., yield X %N). Adequate understanding of the effects on innoculate in nutrient management strategies requires further evaluation.