Field application of swine (Sus scrofa) slurry provides essential nutrients for crop production. The N to P ratio for slurry is lower than needed by most crops resulting in P accumulation when applied at N rates required for crop growth. Low phytate corn (Zea mays L.) (LPC) contains similar amounts of total P but less phytate P than traditional corn (TC) resulting in improved P bioavailability and reduced P excretion by monogastric animals. While manure from swine-fed LPC diets has a higher N to P ratio than that from TC diets, field studies comparing crop utilization of nutrients from LPC manure have not been conducted. A field study was conducted to compare N and P utilization by no-tillage rainfed sorghum [Sorghum bicolor (L.) Moench.] receiving three annual surface applications of nutrients (inorganic fertilizer, LPC slurry, and TC slurry) and by irrigated corn receiving one incorporated application of nutrients. Sorghum grain and total dry matter N utilization exhibited a year by treatment interaction but total dry matter N utilization was similar for both manure types in all years (61.2 % for TC and 53.8 % for LPC). Grain P utilization was similar for inorganic fertilizer and manure but differed among years (44.4% in 1999, 25.1% in 2000, and 57.0% in 2001). Corn grain N and P utilization did not differ among nutrient sources in the year of application (50.7% for N and 40.4 for P) and increased little in the year following application (62.2 % for N and 50.2 % for P). Crop N and P utilization from LPC manure and TC manure was similar and nutrient guidelines developed for TC swine slurry should also apply for LPC slurry.<\/p>\n
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PDF provided from Agron. J. 100:4 pp:\u00a0997-1004 (2008), with permission, copyright American Society of Agronomy.<\/p>\n","protected":false},"excerpt":{"rendered":"
Field application of swine (Sus scrofa) slurry provides essential nutrients for crop production. The N to P ratio for slurry is lower than needed by most crops resulting in P accumulation when applied at N rates required for crop growth. Low phytate corn (Zea mays L.) (LPC) contains similar amounts of total P but less […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,930],"tags":[8882,640,10871,13816,2817,6988,577,1287,864,11013,483,8291,316,20007,158,10660,169,187,15552,15459,188,1690,16262,17743,27282,210,35,20911,18011,52],"class_list":["post-8698","post","type-post","status-publish","format-standard","hentry","category-environment","category-production","tag-al","tag-animal","tag-apply","tag-ass","tag-cla","tag-color","tag-diet","tag-diets","tag-dry-matter","tag-enzyme-in-sow-diet","tag-fertilizer","tag-field-application","tag-gas","tag-gh","tag-growth","tag-low-phytate-corn-ruminants","tag-manure","tag-nitrogen","tag-pdf","tag-ped","tag-phosphorus","tag-phytate","tag-pl","tag-prod","tag-production","tag-slurry","tag-swine","tag-t","tag-tot","tag-treatment"],"_links":{"self":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/8698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=8698"}],"version-history":[{"count":11,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/8698\/revisions"}],"predecessor-version":[{"id":11308,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/8698\/revisions\/11308"}],"wp:attachment":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=8698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=8698"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=8698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}