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Effect of effective microorganism and gypsum amendments on nutrient leaching, pH, electrical conductivity, and Okra growth parameters under coastal saline soil

Author:
Mtolera, Ibrahim, Dongli, She
Source:
Communications in soil science and plant analysis 2018 v.49 no.18 pp. 2327-2337
ISSN:
1532-2416
Subject:
ammonium, application rate, beneficial microorganisms, electrical conductivity, gypsum, leachates, leaching, nitrates, nitrogen content, nutrients, okra, saline soils, soil amendments, soil pH
Abstract:
Nutrients losses through leaching are the main problem facing coastal saline soil. Effective microorganisms (EM) and Gypsum (G) at the application rate of 5%G and 10%G by weight were used as soil amendments. The pot experiment aimed to improve the leaching of nitrate (NO₃), ammonium (NH₄) and total nitrogen (TN) on the coastal saline soil. The EM+ 5%G treatment effectively reduced the content of NO₃ and NH₄ in the leachate by 86.59% and 68.18%, respectively. EM treatment reduced the leaching of NO₃ and NH₄ by 70.86% and 62.12% and EM+ 10%G reduced NO₃ and NH₄ by 11.80% and 50.76%, respectively. Moreover, the content of TN in leachate was reduced up to 13.23%, 5.80%, and 2.67% in response to EM, EM+ 5%G, and EM+ 10%G, respectively, compared to the control. These results indicate that EM combined with G as soil amendments can reduce leaching of nutrients and further support the regulation of a coastal saline soil pH and EC.
Agid:
6139330