Effects of composted dairy manure on soil chemical properties and forage yield and nutritive value of coastal Bermudagrass [Cynodon dactylon (L.) Pers.]

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Title: Effects of composted dairy manure on soil chemical properties and forage yield and nutritive value of coastal Bermudagrass [Cynodon dactylon (L.) Pers.]
Author: Helton, Thomas J.
Abstract: Research was conducted to compare the effects of composted dairy manure and raw dairy manure alone , or in combination with supplemental inorganic fertilizer , on soil chemical properties and Coastal bermudagrass [Cynodon dactylon (L . ) Pers .] yield and nutritive value . Composted dairy manure was surface applied at rates of 14 (125 kg N ha -1 ) , 29 (250 kg N ha -1 ) and 57 (500 kg N ha -1 ) Mg dry matter (DM ) ha -1 , and raw dairy manure was surface applied at a rate of 54 (420 kg N ha -1 ) Mg DM ha -1 to established bermudagrass . Selected compost and manure plots received supplemental inorganic N at rates of 56 , 84 and 112 kg ha -1 cutting -1 or 112 kg ha -1 cutting -1 of supplemental N with supplemental inorganic phosphorus or potassium at rates of 112 kg P2O5 ha -1 yr -1 and 112 kg K2O ha -1 cutting -1 , respectively . Composted dairy manure (29 and 57 Mg DM ha -1 ) or raw manure alone increased cumulative forage yields compared to the untreated check in both years of the study , but were less than those obtained using only inorganic fertilizer . Application of 56 kg N ha -1 cutting -1 or more of supplemental N to compost (29 and 57 Mg DM ha -1 ) or iv manure produced forage yields that were equal to or greater than those obtained using inorganic fertilizer alone . However , increasing compost rate did not increase tissue N concentrations regardless of supplemental inorganic N rate . Yield and tissue K concentrations were increased in the second growing season when supplemental inorganic K was applied to 29 Mg ha -1 of compost or 54 Mg ha -1 of raw dairy manure . No yield response was observed when supplemental inorganic P was applied to compost or manure . Soil pH and concentrations of NH4 , NO3 , K , Ca , Mg and Mn were increased by application of compost or manure . Soil P concentrations in the 0 to 5 -cm zone exceeded 200 mg kg -1 when compost was applied at the high rate . Dairy manure compost was an effective nutrient source for bermudagrass hay production , but will require the use of supplemental N and , in some cases , K to achieve yields comparable to inorganic fertilizer .
URI: http : / /hdl .handle .net /1969 .1 /1333
Date: 2005-02-17

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Effects of composted dairy manure on soil chemical properties and forage yield and nutritive value of coastal Bermudagrass [Cynodon dactylon (L.) Pers.]. Available electronically from http : / /hdl .handle .net /1969 .1 /1333 .

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