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Application of humic substances results in consistent increases in crop yield and nutrient uptake

Greet Verlinden (UGent) , Bart Pycke (UGent) , J Mertens, Filip Debersaques (UGent) , Kris Verheyen (UGent) , Geert Baert (UGent) , J Bries and Geert Haesaert (UGent)
(2009) JOURNAL OF PLANT NUTRITION. 32(9). p.1407-1426
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Abstract
The effect of humic substances on yield and nutrient uptake of grass, maize, potato and spinach was investigated in six field experiments and two pot experiments in a high input cropping system. The humic substances originating from leonardite formations in Canada were applied as liquid solution to the soil (Humifirst liquid) or as a solid incorporated in mineral fertilizers (Humifirst incorporated). Formal meta-analysis of the results of all executed experiments showed that the application of humic substances had an overall positive effect on dry matter yield of the crops and this effect was statistically significant for Humifirst incorporated. In the case of permanent grassland, humic substances promoted mainly the production of the first grass cut, which has the highest grass quality among all cuts during the growing season. Tuber production on the potato field trial showed a high response on the application of humic substances. Total potato yield increased with 13 and 17% for Humifirst liquid and Humifirst incorporated, respectively. The effect of humic substances on maize yield was limited, probably due to the rather high nutrient status of both soils. Finally, the formal meta-analysis showed a consequent increase in nitrogen and phosphorus uptake of all studied crops as well. The effect on potassium and magnesium uptake was also mainly positive, while sodium and calcium uptake were not affected in most of the experiments.
Keywords
SOILS, ACID, GROWTH, PHOSPHORUS, ATPASE ACTIVITY, spinach, potato, maize, grass, macronutrients, humic substances, leonardite, SEQUESTRATION, STIMULATION, MATTER, ROOTS, MODEL

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Chicago
Verlinden, Greet, Bart Pycke, J Mertens, Filip Debersaques, Kris Verheyen, Geert Baert, J Bries, and Geert Haesaert. 2009. “Application of Humic Substances Results in Consistent Increases in Crop Yield and Nutrient Uptake.” Journal of Plant Nutrition 32 (9): 1407–1426.
APA
Verlinden, G., Pycke, B., Mertens, J., Debersaques, F., Verheyen, K., Baert, G., Bries, J., et al. (2009). Application of humic substances results in consistent increases in crop yield and nutrient uptake. JOURNAL OF PLANT NUTRITION, 32(9), 1407–1426.
Vancouver
1.
Verlinden G, Pycke B, Mertens J, Debersaques F, Verheyen K, Baert G, et al. Application of humic substances results in consistent increases in crop yield and nutrient uptake. JOURNAL OF PLANT NUTRITION. 2009;32(9):1407–26.
MLA
Verlinden, Greet, Bart Pycke, J Mertens, et al. “Application of Humic Substances Results in Consistent Increases in Crop Yield and Nutrient Uptake.” JOURNAL OF PLANT NUTRITION 32.9 (2009): 1407–1426. Print.
@article{851737,
  abstract     = {The effect of humic substances on yield and nutrient uptake of grass, maize, potato and spinach was investigated in six field experiments and two pot experiments in a high input cropping system. The humic substances originating from leonardite formations in Canada were applied as liquid solution to the soil (Humifirst liquid) or as a solid incorporated in mineral fertilizers (Humifirst incorporated). Formal meta-analysis of the results of all executed experiments showed that the application of humic substances had an overall positive effect on dry matter yield of the crops and this effect was statistically significant for Humifirst incorporated. In the case of permanent grassland, humic substances promoted mainly the production of the first grass cut, which has the highest grass quality among all cuts during the growing season. Tuber production on the potato field trial showed a high response on the application of humic substances. Total potato yield increased with 13 and 17\% for Humifirst liquid and Humifirst incorporated, respectively. The effect of humic substances on maize yield was limited, probably due to the rather high nutrient status of both soils. Finally, the formal meta-analysis showed a consequent increase in nitrogen and phosphorus uptake of all studied crops as well. The effect on potassium and magnesium uptake was also mainly positive, while sodium and calcium uptake were not affected in most of the experiments.},
  author       = {Verlinden, Greet and Pycke, Bart and Mertens, J and Debersaques, Filip and Verheyen, Kris and Baert, Geert and Bries, J and Haesaert, Geert},
  issn         = {0190-4167},
  journal      = {JOURNAL OF PLANT NUTRITION},
  keyword      = {SOILS,ACID,GROWTH,PHOSPHORUS,ATPASE ACTIVITY,spinach,potato,maize,grass,macronutrients,humic substances,leonardite,SEQUESTRATION,STIMULATION,MATTER,ROOTS,MODEL},
  language     = {eng},
  number       = {9},
  pages        = {1407--1426},
  title        = {Application of humic substances results in consistent increases in crop yield and nutrient uptake},
  url          = {http://dx.doi.org/10.1080/01904160903092630},
  volume       = {32},
  year         = {2009},
}

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