{"id":1457,"date":"2018-03-29T08:15:04","date_gmt":"2018-03-29T08:15:04","guid":{"rendered":"https:\/\/muthjas.mu.edu.iq\/?p=1457"},"modified":"2018-03-29T08:15:04","modified_gmt":"2018-03-29T08:15:04","slug":"effect-water-salinity-biological-nitrogen-transformation-soil","status":"publish","type":"post","link":"https:\/\/muthjas.mu.edu.iq\/?p=1457","title":{"rendered":"The effect of water salinity on biological nitrogen transformation in the  soil"},"content":{"rendered":"<p style=\"direction: ltr;\"><strong>Abstract<\/strong><\/p>\n<p style=\"direction: ltr;\">Lab experiments were conducted at ascientific unit research in college of Agric. Colleg, Baghdad Univ. Soil was treated with mixture of following salts KCl ,MgCl2 , NaCl, CaCl2 to create four levels of salanity: 0.3 ,2.5 , 4.8 , 7.2 ds m-1, the treated soil samples were put in plastic cans (200gm), nitrogen fertilizer with two levels were added (as urea)(100kg N ha<sup>-1<\/sup>)(200N kg ha<sup>-1<\/sup>).The samples were incubated four weeks at 30*c. Soil samples were taken to determine NH<sub>4<\/sub><sup>+<\/sup> , NO<sub>3<\/sub><sup>&#8211;<\/sup> , SAR and the number of nitrobacter and nitrosomanas bacteria. The results of the experiments showed asignificant increase in the amount of NH<sub>4<\/sub><sup>+<\/sup> in both treatment of tap water , the first level of nitrogen fertilizer after two weeks of incubation was 305.5 mg N kg<sup>-1<\/sup> . while the amount of NH<sub>4<\/sub><sup>+<\/sup> decreased to 291.8 mg N kg<sup>-1<\/sup> when the consentration of salinity in creased . Also there was adecline in the amount of NH<sub>4<\/sub><sup>+<\/sup> when the value of SAR increased and gave 281.5 mg N kg<sup>-1<\/sup> soil , the elevation of salinity of the water caused reduction in the oxidation of NH<sub>4<\/sub><sup>+<\/sup> to NO<sub>3<\/sub><sup>&#8211;<\/sup> which give 94.7mg N. the high salinity of water played an important role in SAR value which increased from 18 to 33.5 at 7.2 ds.m<sup>-1<\/sup> , the results showed also was a clear decline in the the sailinty of water increased after four weeks of incubation number of nitrosomonas from 0.401 x 10<sup>6<\/sup>cfu to 0.014&#215;10<sup>4<\/sup> cfu . gm<sup>-1<\/sup> when. we can canclude that nitrobacter bacteria more sensitive to salinity than the nitrosomonas.<\/p>\n<p style=\"direction: ltr;\">Key word:.<\/p>\n<p style=\"direction: ltr;\"><strong>Abdul Hameed, B.A., Agric. College, Baghdad Univ. <\/strong><\/p>\n<p style=\"direction: ltr;\"><strong>Majaid, N. H., Agric. College, Baghdad Univ.\u00a0 \u00a0<\/strong><\/p>\n<p style=\"direction: ltr;\"><strong>Farage, H. A.,\u00a0 Agric. College, Baghdad Univ. <\/strong><\/p>\n<p style=\"direction: ltr;\"><strong>&#8230;.<a href=\"https:\/\/muthjas.mu.edu.iq\/wp-content\/uploads\/2018\/03\/38-46-Ready-for-publication.pdf\">download<\/a>&#8230;.\u00a0 \u00a0\u00a0<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Abstract Lab experiments were conducted at ascientific unit research in college of Agric. Colleg, Baghdad Univ. Soil was treated with mixture of following salts KCl ,MgCl2 , NaCl, CaCl2 to create four levels of salanity: 0.3 ,2.5 , 4.8 , 7.2 ds m-1, the treated soil samples were put in plastic cans (200gm), nitrogen fertilizer [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-1457","post","type-post","status-publish","format-standard","hentry","category-home"],"_links":{"self":[{"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=\/wp\/v2\/posts\/1457","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1457"}],"version-history":[{"count":1,"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=\/wp\/v2\/posts\/1457\/revisions"}],"predecessor-version":[{"id":1460,"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=\/wp\/v2\/posts\/1457\/revisions\/1460"}],"wp:attachment":[{"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/muthjas.mu.edu.iq\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}