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ARS Home » Midwest Area » Morris, Minnesota » Soil Management Research » Research » Publications at this Location » Publication #113493
Title: USING RESIN-EXTRACTION OF SOIL NUTRIENTS FOR GENOTYPE SELECTION AND FERTILITY MANAGEMENT

Author
item Olness, Alan

Submitted to: International Conference on Plant Nutrition
Publication Type: Abstract Only
Publication Acceptance Date: 3/26/2001
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Correlation of elemental intensity obtained from resin-extractions of soil with crop yields provides guidance on genotype selection and fertility management. This is demonstrated using two hybrids of maize (Zea mays L.), three varieties of soybean (Glycine max L.) and two varieties of wheat (Triticum aestivum L.) grown in rotational succession annually on a 3.2 ha field site. Soil samples (0 to 15 cm) were extracted with ion-exchange resins. Extracted ions were analyzed and data were regressed against crop yield using stepwise multiple correlation methods. Each genotype was sensitive to a unique combination of extracted chemistries. Soybean variety 9091 and maize hybrid 2292 both showed marked responses to the Mg:(Mg+Ca) resin-extractable ratios which suggests that Mg is a reasonable fertilizer. Most genotypes were sensitive to the presence of vanadium (V) and/or to the V:(V+P) ratio, one variety each of soybean and wheat were insensitive to this ratio. Wheat was unresponsive to the Mg:(Mg+Ca) ratio but responded near linearly to resin-extractable Fe (as much as 40% or 1000 kg ha**-1) and curvilinearly to K. Losses of yield potentials associated with the V:(V+P) ratio ranged from nil to as much as 25% as the ratio ranged from 0 to about 0.15 for all crops. Large extractable concentrations of competing or inhibitory ions suggest banded applications of fertilizer elements as a reasonable management strategy; such applications overcome effects of competing ions at reasonable economic cost to the producer. Varieties and hybrids with similar responses to resin-extractable elements are identified as compatible successive genotypes because each benefits from the same fertilization management practices. The results provide direction in plant breeding by identifying nutrient acquisition barriers for plants.