Advanced search
1 file | 166.20 KB

Does acidification increase the nitrogen fertilizer replacement value of bio-based fertilizers?

Author
Organization
Abstract
Acidification of manure, digestate and their processed derivatives has been proposed as a technique to, amongst others, mitigate ammonia emissions related to application in the field. The current study investigated whether acidification of (1) pig slurry (PS), (2) liquid fraction of pig slurry (LFPS), (3) digestate (DIG), and (4) liquid fraction of digestate (LFDIG) increases their nitrogen (N) fertilizer replacement value (NFRV) as compared to non-acidified counterparts, a synthetic N fertilizer (calcium ammonium nitrate; CAN) and an unfertilized control. Product performance was evaluated from the perspective of (1) crop development (yield, nutrient uptake, and crop quality assessment) via a pot experiment with Lactuca sativa L. and (2) soil N dynamics [net N release (N-rel,N-net) and net N mineralization] via a soil incubation experiment. Crop yield of pots receiving bio-based fertilizers performed on par' with CAN as compared to unfertilized control, implying that bio-based fertilizers derived from digestate or manure could potentially play a role in replacing synthetic N fertilizers. However, our findings also suggest that acidification did not result in an increased use efficiency of applied N. NFRVs of acidified products were below those of non-acidified products and CAN, with crop yield on average 6-13% and 11-18% lower compared to non-acidified products and the CAN treatment, respectively. A possible explanation for lower performance as compared to non-acidified products could be an inhibitory delay in the N-rel,N-net, which in our experimental design proved to be negative for crops with short production cycles. This pattern was revealed in the incubation experiments in which N-rel,N-net in acidified products remained below that of non-acidified, in this study tentatively attributed to immobilization of mineral N. However, this negative effect on N availability should be reaffirmed in crops with longer production cycles. Finally, some interesting findings with regard to plant composition also warrant further in-depth investigation, e.g., Zn uptake by lettuce in acidified treatments was significantly higher than that of non-acidified treatments. This implies that product pre-treatment may play a future role in biofortification and amelioration of (trace) element composition of crops (arguably for crops with longer production cycles). Improving crop nutritional value by increased uptake of micronutrients is receiving increasing attention.
Keywords
acidification, animal manure, digestate, nitrogen dynamics, nitrogen fertilizer replacement value, SLURRY ACIDIFICATION, N MINERALIZATION, SOIL PROPERTIES, ANIMAL SLURRY, CROPS, QUANTIFICATION, DIGESTATE

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 166.20 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Sigurnjak, Ivona, Evi Michels, Sara Crappé, Saskia Buysens, Jayanta K Biswas, Filip Tack, Stefaan De Neve, and Erik Meers. 2017. “Does Acidification Increase the Nitrogen Fertilizer Replacement Value of Bio-based Fertilizers?” Journal of Plant Nutrition and Soil Science 180 (6): 800–810.
APA
Sigurnjak, I., Michels, E., Crappé, S., Buysens, S., Biswas, J. K., Tack, F., De Neve, S., et al. (2017). Does acidification increase the nitrogen fertilizer replacement value of bio-based fertilizers? JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE, 180(6), 800–810.
Vancouver
1.
Sigurnjak I, Michels E, Crappé S, Buysens S, Biswas JK, Tack F, et al. Does acidification increase the nitrogen fertilizer replacement value of bio-based fertilizers? JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE. 2017;180(6):800–10.
MLA
Sigurnjak, Ivona, Evi Michels, Sara Crappé, et al. “Does Acidification Increase the Nitrogen Fertilizer Replacement Value of Bio-based Fertilizers?” JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE 180.6 (2017): 800–810. Print.
@article{8535716,
  abstract     = {Acidification of manure, digestate and their processed derivatives has been proposed as a technique to, amongst others, mitigate ammonia emissions related to application in the field. The current study investigated whether acidification of (1) pig slurry (PS), (2) liquid fraction of pig slurry (LFPS), (3) digestate (DIG), and (4) liquid fraction of digestate (LFDIG) increases their nitrogen (N) fertilizer replacement value (NFRV) as compared to non-acidified counterparts, a synthetic N fertilizer (calcium ammonium nitrate; CAN) and an unfertilized control. Product performance was evaluated from the perspective of (1) crop development (yield, nutrient uptake, and crop quality assessment) via a pot experiment with Lactuca sativa L. and (2) soil N dynamics [net N release (N-rel,N-net) and net N mineralization] via a soil incubation experiment. Crop yield of pots receiving bio-based fertilizers performed on par' with CAN as compared to unfertilized control, implying that bio-based fertilizers derived from digestate or manure could potentially play a role in replacing synthetic N fertilizers. However, our findings also suggest that acidification did not result in an increased use efficiency of applied N. NFRVs of acidified products were below those of non-acidified products and CAN, with crop yield on average 6-13\% and 11-18\% lower compared to non-acidified products and the CAN treatment, respectively. A possible explanation for lower performance as compared to non-acidified products could be an inhibitory delay in the N-rel,N-net, which in our experimental design proved to be negative for crops with short production cycles. This pattern was revealed in the incubation experiments in which N-rel,N-net in acidified products remained below that of non-acidified, in this study tentatively attributed to immobilization of mineral N. However, this negative effect on N availability should be reaffirmed in crops with longer production cycles. Finally, some interesting findings with regard to plant composition also warrant further in-depth investigation, e.g., Zn uptake by lettuce in acidified treatments was significantly higher than that of non-acidified treatments. This implies that product pre-treatment may play a future role in biofortification and amelioration of (trace) element composition of crops (arguably for crops with longer production cycles). Improving crop nutritional value by increased uptake of micronutrients is receiving increasing attention.},
  author       = {Sigurnjak, Ivona and Michels, Evi and Crapp{\'e}, Sara and Buysens, Saskia and Biswas, Jayanta K and Tack, Filip and De Neve, Stefaan and Meers, Erik},
  issn         = {1436-8730},
  journal      = {JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE},
  keyword      = {acidification,animal manure,digestate,nitrogen dynamics,nitrogen fertilizer replacement value,SLURRY ACIDIFICATION,N MINERALIZATION,SOIL PROPERTIES,ANIMAL SLURRY,CROPS,QUANTIFICATION,DIGESTATE},
  language     = {eng},
  number       = {6},
  pages        = {800--810},
  title        = {Does acidification increase the nitrogen fertilizer replacement value of~bio-based fertilizers?},
  url          = {http://dx.doi.org/10.1002/jpln.201700220},
  volume       = {180},
  year         = {2017},
}

Altmetric
View in Altmetric
Web of Science
Times cited: