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- Title
Phosphorus Uptake by Potato from Biochar Amended with Anaerobic Digested Dairy Manure Effluent.
- Authors
Collins, Harold P.; Streubel, Jason; Alva, Ashok; Porter, Lyndon; Chaves, Bernardo
- Abstract
Sorption of plant nutrients from dairy storage lagoons by biochar and use as a supplemental fertilizer is a beneficial strategy to reduce nutrient contamination around dairies and supply nutrients to potato (Solanum tuberosum L.) and other crops. This research evaluated potato growth responses and P partitioning from several rates of P applied as either mono-ammonium phosphate (MAP) or as P recovered from anaerobic digested dairy manure using biochar. Single-stemmed plants of the potato cultivars Ranger Russet and Umatilla Russet were grown in 7-L pots containing Quincy sand soil (mixed, mesic Xeric Torripsamment). Biochar amended with dairy effluent applied at 5.7 and 11.4 Mg ha-1 with fertilizer application rates equivalent to 55 and 110 kg P ha-1 maintained adequate P levels in potato petioles of both cultivars through 85 d after planting. Total plant P uptake was greater for treatments receiving MAP. Total potato biomass and tuber yields of Umatilla Russet were 30 and 27% lower when amended with basic or enriched biochar compared to MAP treatments, respectively. Tuber biomass declined 10 and 20% for Ranger Russet and Umatilla Russet for the 11.4 Mg ha-1 amended biochar, respectively compared to MAP fertilized treatments. Similar declines were found for the aboveground biomass and roots. The 5.7 Mg ha-1 of enriched biochar supplied 70 to 80% of the P requirement for potato growth. These findings are an important step in providing evidence of the benefits of using recovered P as a fertilizer supplement to reduce the reliance on rock phosphates.
- Subjects
SORPTION; PLANT nutrients; BIOCHAR; LAGOONS; FERTILIZERS; POTATOES
- Publication
Agronomy Journal, 2013, Vol 105, Issue 4, p989
- ISSN
0002-1962
- Publication type
Article
- DOI
10.2134/agronj2012.0363