Aeration Change of Potting Soil under Different Fertilization Treatments

Purpose To examine the dynamic changes of soil aeration under different fertilization treatments.

Methods The soil of greenhouse vegetable field in Nanjing, Jiangsu Province was taken as the research object, the differences of soil oxygen volume fraction among no-fertilizer (CK), normal urea (T₁), humic acid urea (T₂), organic manure (T₃), and organic manure+urea (T₄) in the pot experiment were compared.

Results The bulk density among these treatments were non-significant difference as followed: T₁>T₃>CK>T₂=T₄. Compared with CK treatment, T₁, T₂ and T₃ treatment significantly increased soil oxygen volume fraction by 7.07%, 6.53%, and 3.20%, respectively. The variation trend of soil oxygen volume fraction in different fertilizer treatments was different during the growth period, and the soil oxygen volume fraction increased during the day, but the peak time was different.

Conclusion The type of fertilization will significantly affect the soil oxygen volume fraction, and the application of humic acid urea is better in terms of soil bulk density and soil average oxygen volume fraction.