Impact of bio-digestate and fertilization on the soil chemical properties, growth and yield of maize (Zea mays L.)

Citation :- Impact of bio-digestate and fertilization on the soil chemical properties, growth and yield of maize (Zea mays L.). Res. Crop. 25: 33-42
Address : Agriculture Programme, College of Agriculture, Engineering and Science, Bowen University, Iwo, Nigeria
Submitted Date : 2-11-2023
Accepted Date : 7-02-2024


Recognizing the significance of maize cultivation, it is imperative to determine the appropriate levels of NPK fertilizer along with the supplementary inclusion of bio-digestate (an organic fertilizer), to achieve optimal soil chemical properties and crop yields. Hence, a field study was conducted in 2022 at the Teaching and Research Farm of Bowen University, Iwo, Osun State, Nigeria. The study evaluated the effects of bio-digestate fertilizer (D), applied alone and integrated with urea (N), single superphosphate (P) and muriate of potash fertilizers (K) at low (N1K1P1) and high (N2P2K2) rates on soil chemical properties, growth, and yield of maize (Zea mays (L.). The treatments consisted of application of: D at 2500 L/ha alone, D + N1 P1 K1, D + N1 P1 K2, D + N1 P2 K1, D + N1 P2 K2, D + N2 P1 K1, D + N2 P1 K2, D + N2 P2 K1, D + N2 P2 K2, Control. N1 = 60 kg N/ha, N2 = 120 kg N/ha, P1 = 30 kg P2O5/ha, P2 = 60 kg P2O5/ha, K1 = 30 kg K/ha, K2 = 60 kg K/ha. The 10 treatments were arranged in a randomized complete block design and replicated three times. Results showed that bio-digestate (D) fertilizer applied alone or integrated with NPK fertilizers improved soil chemical properties, growth, and yield of maize compared with the control. High rate of fertilizer DN2P2K2 increased soil chemical properties and growth parameters of maize relative to low rates DN1P1K1 whereas a higher yield was recorded at a low rate DN1P1Krelative to a high rate of fertilizer DN2P2K2. Overall, the treatment DN1P1K1 demonstrated the highest grain yield. D alone increased shelled maize yield by 187.9 % relative to no application of any amendment (control), also integrating D with N1P1K1 (DN1P1K1) increased maize yield by 97.2% relative to D alone.  Bio-digestate can be used for maize cultivation in lonely soil especially when integrated with NPK fertilizer. Therefore, to avoid waste of fertilizer due to cost and negative environmental effects of excessive fertilization, the lower rate of NPK fertilizer: N (60 kg N/ha), P (30 kg P2O5/ha), and K (30 kg K/ha) with 2500 L/ha of bio-digestate (DN1P1K1) is recommended for sustainable maize production.


Bio-digestate fertilizer maize soil chemical properties urea 


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