Residual effects of lime- and clay-amended biosolids applied to coarse-textured pasture soil

Sanjutha Shanmugam, Lynette Abbott

Research output: Contribution to journalArticle

Abstract

This study investigated whether there was residual effect of application of lime- and clay-amended biosolids (LaBC®) on ryegrass growth and soil microbial biomass in a coarse-textured, acid pasture soil. Reapplied LaBC® increased fertiliser-use efficiency and plant growth in this glasshouse experiment. Soil management history was established with a single application of LaBC® (50 t ha-1 wet weight equivalent) with or without inorganic fertiliser (NPK) prior to growing annual ryegrass for 5 cycles. In cycle 6 there was no residual nutrient effect of the original application of LaBC® but there was a residual liming effect of the previously applied LaBC®. A nutrient effect of reapplied LaBC® in plant growth cycle 6, had little residual benefit in cycle 7. The residual concentration of inorganic N remaining in this coarse-textured acid soil after a single application of LaBC® was negligible and did not appear to be a risk to the environment when applied at 50 t ha-1 wet weight equivalent.
Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalApplied and Environmental Soil Science
Volume2015
DOIs
Publication statusPublished - 2015

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