Yield response of corn to lime and urea application on an acidic tropical soil
作者:
R.C. Dalai,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1986)
卷期:
Volume 17,
issue 7
页码: 789-798
ISSN:0010-3624
年代: 1986
DOI:10.1080/00103628609367751
出版商: Taylor & Francis Group
关键词: Zea maysL.;nutrient uptake;soil acidity;exchangeable aluminium;CaCO3;nitrification;P availability
数据来源: Taylor
摘要:
The effects of liming (7 500 kg CaCO3/ha) and rate of urea application (0,50,100, and 200 kg N/ha) and its placement at the surface or at 5 cm depth on grain yield and nutrient uptake by corn grown on an acidic tropical soil (Fluventic Eutropept) were studied. Liming significantly increased grain yield, N uptake, and P and K uptake although Ca and Mg uptake, generally, were unaffected. Sub‐surface application of urea increased N uptake only. Yield response to applied N was observed up to 50 kg N/ha when limed but at all rates in the absence of liming. It therefore, reduced the fertilizer N requirement for optimum grain yield. Liming the acidic soil also reduced exchangeable Al but increased nitrification rate and available P in the soil profile (at least up to 0.6 m depth).
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