Open AccessApplication of Two Microbial Teas Did Not Affect Collard or Spinach Yield
Author(s) -
Sharon J. B. Knewtson,
Jason Griffin,
Edward E. Carey
Publication year - 2009
Publication title -
hortscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.518
H-Index - 90
eISSN - 2327-9834
pISSN - 0018-5345
DOI - 10.21273/hortsci.44.1.73
Subject(s) - loam , spinach , agronomy , brassica oleracea , nutrient , soil fertility , amendment , crop , fertilizer , biomass (ecology) , organic fertilizer , yield (engineering) , horticulture , chemistry , environmental science , biology , soil water , biochemistry , organic chemistry , political science , law , soil science , materials science , metallurgy
Microbial tea from a commercial source and a homemade manure tea were evaluated for 2 years under organic and conventional fertility regimens. Testing with different fertility regimens allowed broader assessment of tea efficacy. Collard green ( Brassica oleracea L. var. acephala cv. Top Bunch) yield and soil microbial activity were measured after microbial tea applications were made in three fertility treatments (conventional, organic, or no fertilizer amendment) on a previously unfertilized sandy loam soil. Spinach ( Spinacia oleracea L. cv. Hellcat) and collard green yields were determined after commercial microbial tea application to a silt loam soil previously managed with organic or conventional vegetable crops in open fields and under high tunnels. Results indicated that nutrient additions influenced crop yields, even doubling yield. This demonstrated that improved nutrient availability would affect yield at the chosen locations. However, microbial tea applications did not affect crop yield. These results did not support the hypothesis that microbial tea improves plant nutrient uptake. Additionally, soil microbial respiration and biomass were unaffected after two or three tea applications.