TY  - JA
AU  - Melo Araujo,M.D.
AU  - Alves Primo,A.
AU  - Fernandes,J.K.S.
AU  - Vasconcelos Vieira,L.
AU  - Guimarães Clark,M.V.
AU  - Lisboa Guedes,F.
AU  - Pompeu,R.C.F.F.
AU  - Sagrilo,E.
AU  - de Souza,H.A.
TI  - Different sources of nitrogen fertilizer in rainfed maize grown in a semiarid environment
SN  - 1532-4982
PY  - 2024///
CY  - United Kingdom
PB  - Taylor and Francis Ltd.
KW  - Organic fertilizers
KW  - AGROVOC
KW  - Soil fertility
KW  - Nutritional status
KW  - Zea mays
KW  - Semiarid zones
KW  - Nitrogen fertilizers
N1  - Peer review
N2  - Although nitrogen is the nutrient most required by maize, doses of N lower than those recommended are applied to maize grown in semiarid environments, which limits the achievement of profitable yields. The objective of this study was to evaluate changes in soil fertility, nutritional status and dry matter production of maize plants fertilized with organic and mineral fertilizers in a semiarid region. A factorial experiment was carried out in Sobral, Ceará state, Brazil, in a randomized block design. The factors were two N sources (organic compost and urea), and four N rates: 27.5, 55, 110 and 165 kg ha−1, with three replications. We assessed variables associated with soil fertility, plant nutritional status, chlorophyll content, grain yield and total dry matter production. The highest rates of organic compost resulted in the highest levels of P (17.7 mg dm−3) and K (102.2 mg dm−3) in soil when compared to the control (7.7 and 69.0 mg dm−3, respectively). However, organic compost rates below 110 kg ha−1 of N-equivalent fertilizer were not enough to supply the plants’ demand for P and K. Low N rates promoted a decrease in soil inorganic N in the second year of application. Applying urea to maize plants led to greater dry matter production than organic compost in the second consecutive crop season. The use of organic compost at rates lower than 110 kg ha−1 of N-equivalent fertilizer decreases soil fertility and has no impact on maize dry matter production
DO  - https://doi.org/10.1080/15324982.2023.2240745
T2  - Arid Land Research and Management
ER  -