Is the NH₄ ⁺-induced growth inhibition caused by the NH₄ ⁺ form of the nitrogen source or by soil acidification?

ABSTRACT: Soil acidification often occurs when the concentration of ammonium (NH₄ ⁺) in soil rises, such as that observed in farmland. Both soil acidification and excess NH₄ ⁺ have serious adverse effects on crop growth and food production. However, we still do not know which of these two inhibitors has a greater impact on the growth of crops, and the degree of their inhibitory effect on crop growth have not been accurately evaluated. 31 wheat cultivars originating in various areas of China were planted under 5 mM sole NH₄ ⁺ (ammonium nitrogen, AN) or nitrate nitrogen in combined with two pH levels resembling acidified conditions (5.0 and 6.5). The results showed that the shoots and roots biomass were severely reduced by AN in both an

SUBMITTER: Wang F 

PROVIDER: S-EPMC9505920 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature