{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T18:21:00Z","timestamp":1782843660962,"version":"3.54.5"},"reference-count":31,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2001,9,1]],"date-time":"2001-09-01T00:00:00Z","timestamp":999302400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Swedish Council for Forestry and Agricultural Research"}],"content-domain":{"domain":["acsess.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Env Quality"],"published-print":{"date-parts":[[2001,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Cover crops are a management option to reduce NO<jats:sub>3<\/jats:sub> leaching under cereal grain production. A 2\u2010yr field lysimeter study was established in Uppsala, Sweden, to evaluate the effect of a perennial ryegrass (<jats:italic>Lolium perenne<\/jats:italic> L.) cover crop interseeded in barley (<jats:italic>Hordeum vulgare<\/jats:italic> L.) on NO<jats:sub>3<\/jats:sub>\u2013N leaching and availability of N to the main crop. Barley and ryegrass or barley alone were seeded in mid\u2010May 1992, in lysimeters (0.3\u2010m diam. \u00d7 1.2\u2010m depth) of an undisturbed, well\u2010drained, sandy loam soil. Fertilizer N was applied at the same time as labeled <jats:sup>15<\/jats:sup>NH<jats:sub>4<\/jats:sub><jats:sup>15<\/jats:sup>NO<jats:sub>3<\/jats:sub> (10 atom % <jats:sup>15<\/jats:sup>N) at a rate of 100 kg N ha<jats:sup>\u22121<\/jats:sup> In 1993, barley was reseeded in May in the lysimeters but with nonlabeled NH<jats:sub>4<\/jats:sub>NO<jats:sub>3<\/jats:sub> and no cover crop (previous year's cover crop incorporated just prior to seeding). Barley yields and total and fertilizer N uptake in Year 1 (1992) were unaffected by cover crop. Total aboveground N uptake by the ryegrass was 28 kg ha<jats:sup>\u22121<\/jats:sup> at the time of incorporation the following spring. Recovery of fertilizer\u2010derived N in May 1993 was about 100%; 53% in soil, 46% in barley, &lt;2% in ryegrass, and negligible amounts in leachate. In May 1994, the corresponding figures were: 32% in soil, &lt;3% in barley, and, again, negligible amounts in leachate. The cover crop reduced concentrations of NO<jats:sub>3<\/jats:sub>\u2013N in the leachate considerably (&lt;5 mg L<jats:sup>\u22121<\/jats:sup>, compared with 10 to 18 mg L<jats:sup>\u22121<\/jats:sup> without cover crop) at most sampling times from November 1992 to April 1994, and reduced the total amount of NO<jats:sub>3<\/jats:sub>\u2013N leached (22 compared with 8 kg ha<jats:sup>\u22121<\/jats:sup>).<\/jats:p>","DOI":"10.2134\/jeq2001.3051659x","type":"journal-article","created":{"date-parts":[[2010,6,14]],"date-time":"2010-06-14T02:36:30Z","timestamp":1276482990000},"page":"1659-1667","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":47,"title":["Ryegrass Cover Crop Effects on Nitrate Leaching in Spring Barley Fertilized with <sup>15<\/sup>NH<sub>4<\/sub><sup>15<\/sup>NO<sub>3<\/sub>"],"prefix":"10.1002","volume":"30","author":[{"given":"Lars F.","family":"Bergstr\u00f6m","sequence":"first","affiliation":[{"name":"Dep. of Soil Science Swedish Univ. of Agric. Sci. P.O. Box 7072 S\u201075007 Uppsala Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William E.","family":"Jokela","sequence":"additional","affiliation":[{"name":"Dep. of Plant and Soil Science Univ. of Vermont Burlington VT 05405\u20100082"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2001,9]]},"reference":[{"key":"e_1_2_7_2_1","volume-title":"Standard methods for the examination of water and waste water","author":"American Public Health Association","year":"1985"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1080\/09064719309411245"},{"key":"e_1_2_7_4_1","unstructured":"Aronsson H.2000.Nitrogen turnover and leaching in cropping systems with ryegrass catch crops.Acta Universitatis Agriculturae Sueciae\u2014Agraria. PhD diss. Swedish Univ. of Agric. Sci. 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