RELATIONSHIP BETWEEN NITRIFICATION INHIBITORS AND MANY OF ACETYLENIC COMPOUNDS IN SOILS | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 1, Volume 29, Issue 3, March 2004, Page 1527-1538 PDF (178.71 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2004.240835 | ||||
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| Author | ||||
| S. A. M. EI-Sayed | ||||
| Department of Soil and Water Science, Faculty of Agriculture in Assiut, AI-Azhar University | ||||
| Abstract | ||||
| Recent work has shown that acetylene is a potent inhibitor of nitrification in soil. To discover the substituted acetylenes which inhibit nitrification in soil, determination of the effects of seventeen acetylenes monosubstituted (HC" CR) such as (propyne, 1-butyne, 2-ethynyl- pyridine, phenylacetylene, 3-butyn-2-one, 1- phenyl-z- propyn -1- 01, 1-pentyne, 4-phenyl -1- butyne, 5-phenyl-1- pentyne, 1- ethynylcycloh-examine, 2-propyn-1-01, 2·propyn ·1- amine, 1-hexyne, 3-butyn -1- 01, 1-heptyne, 1-octyne, acetylene monocarboxylic acid) and seven disubstituted (RC E CR) acetylene (2-butyne. 3-phenyl-2·propyn ·1-01, diphenylacetylene, 2-butyn ·1· 01, 2-butyn -1, 4-diol, acetylene dicarboxylic acid, 2-butynoic acid) on production of (NO ~ + NO ~ )-N in soils treated with (NH.)2 SO •. The obtained data showed that most of the tested acetylenes substitutes inhibited nitrification process in soil and that some of them were potent inhibitors of nitrification. The results with the four tested gaseous compounds showed that acetylene, propyne, and 1-butyne inhibited nitrification in soils at partial pressures is low (0.1 or 1.0 Pal whereas 2-butyne had little or no effect on nitrification at partial pressures as high as 10 Pa . Also the obtained data with the 21 nongaseous compounds showed that 2-ethynylpyridine, phenylacetylene, and 3-butyn -2- one had the greatest inhibitory effect on nitrification and that acetylene monocarboxylic acid, acetylene dicarboxylic acid, and 2-butynoiC acid had the least effect. Studies on the measuring of C2H2 production in soils treated with the nongaseous compounds showed that the inhibition of nitrification was not due to C2H2 formed by decomposition of these compounds in the soil. Experiments indicate that 2-ethynylpyridine and phenylacetylene can be compared favorably with nitrapyrin (N-Serve) and etridiazole (Dwell) as SOil nitrification inhibitors and have potential practical value for retarding nitrification of N- fertilizers in soil. | ||||
| Keywords | ||||
| Etridiazole; nitrapyrine; phenylacetylene; 2-ethynylpyridine; substituted acetylene; soil nitrification inhibitors | ||||
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