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The effects of cattle slurry and inorganic fertiliser nitrogen on the yield and mineral composition of forage maize. results of preliminary experiment
Author(s) -
Pain Brian F.,
Phipps Richard H.,
Richardson Selwyn J.
Publication year - 1977
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740280807
Subject(s) - slurry , loam , agronomy , forage , silage , nitrogen , crop , factorial experiment , composition (language) , yield (engineering) , fodder , chemistry , zoology , mathematics , environmental science , soil water , biology , materials science , soil science , linguistics , statistics , philosophy , organic chemistry , environmental engineering , metallurgy
Four rates of cow slurry (0, 35, 70 and 105 t/ha) and inorganic nitrogen (0, 40, 80 and 120 kg/ha) were applied in a factorial arrangement to forage maize plots on a sandy loam soil (Hurst Series). The response of maize DM yield to inorganic N was small above 40 kg N/ha. Slurry alone gave satisfactory yields and up to 70 t/ha improved the response to inorganic N. Slurry at 105 t/ha tended to delay crop maturity and reduced yields when more than 40 kg inorganic N/ha was applied. The percentage N, P and K in the soil before drilling and in the crop at the silage stage were positively related to the amount of slurry applied. Appreciable amounts of P, K and Mg remained in a “plant available” state in the soil after the maize harvest.