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|Title:||Leaf nutrient contents of rangpur lime rootstock as afected by N, P, K, Ca and S fertilization.|
CARMELLO, Q. A. de C.
BERNARDI, A. C. de C.
CARVALHO, S. A. de
MATTOS JUNIOR, D.
|Affiliation:||JONAS RUSCHEL, LEGALIZA REGISTROS; QUIRINO AUGUSTO DE CAMARGO CARMELLO, USP/ESALQ, PIRACICABA, SP.; ALBERTO CARLOS DE CAMPOS BERNARDI, CNPS; SÉRGIO ALVES DE CARVALHO, APTA, CORDEIROPOLIS, SP.; DIRCEU MATTOS JUNIOR, APTA, CORDEIROPOLIS, SP.|
|Citation:||Scientia Agricola, v. 61, n. 5, p. 501-506, set./out. 2004.|
|Description:||Analysis of leaf nutrient contents can demonstrate plant nutritional status, identify symptoms of deficiency and toxicity, and evaluate the need to adjust fertilization programs. This research determined N:P:K:Ca:S rates for optimal nutrition of Rangpur lime - RL (Citrus limonia Osb.) rootstock, in an experiment arranged in a fractional factorial design of the (¹/25) 5(4) type, with 25 treatments distributed within five blocks. Seedlings of RL were transplanted into 3.8-dm³ containers filled with commercial growing media, when plant height = 10 cm, in a nursery. Treatments consisted of the following nutrient rates (g per plant): N = 0.31, 0.62, 1.25, 2.5 and 5; K = 0.4, 0.62, 1.25, 2.5 and 5; P = 0.35, 1.0, 2.0, 3.0 and 4.0; and Ca = 3.5, 5.0, 6.0, 7.0 and 8.0. Phosphorus and Ca were applied to the compost before transplant of seedlings, while N and K were applied later and total amounts were split into 20 weekly applications via fertigation. Nutrient sources were triple super phosphate, gypsum, NH4NO3 and KCl. Leaf nutrient concentrations of five-mo-old plants were high or in excess for N, P, K and S. Calcium and Mg concentrations were low. Greater dry mass of plants were observed at nutrient rates of N = 3.5, P = 2.7, K = 2.0, and Ca = 6.5 g per plant.|
|Type of Material:||Artigo de periódico|
|Appears in Collections:||Artigo em periódico indexado (CNPS)|
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