Effect of dairy effluent on the biomass, transpiration, and elemental composition of Salix kinuyanagi Kimura

Marta Marmiroli, Brett H. Robinson, Brent E. Clothier, Nanthi S. Bolan, Nelson Marmiroli, Rainer Schulin

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The land treatment of Dairy Effluent (DE), comprising urine and faeces is common practice, yet can lead to nutrient imbalances in plants and soils. We aimed to determine the growth, transpiration, and elemental composition of Salix kinuyanagi Kimura (Clone No. PN 386) as affected by DE application. DE was applied for 15 weeks to eighteen 122dm 3 lysimeters, either bare or planted with S. kinuyanagi, at N application rates of 0-558kg ha -1 over three months. DE application increased biomass and transpiration. Chlorosis, possibly caused by excess Cl, appeared in the highest treatment. DE application increased foliar concentrations ofN, P, K, Cl, and the foliar N:S ratio to above 15, a level indicative of S deficiency. Concentrations of essential trace elements were unaffected. Trees receiving the N equivalent of 279kg ha -1 removed similar amounts of N and K as were applied in the DE. All DE treatments added more Cl than the plants removed. Soil chloride accumulation may be harmful in drier climes. Future work should include a field trial to determine the long-term sustainability of DE application to willows, and the potential use of willows as animal fodder.

Original languageEnglish
Pages (from-to)282-288
Number of pages7
JournalBiomass and Bioenergy
Volume37
DOIs
Publication statusPublished - Feb 2012
Externally publishedYes

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