Extração e exportação de nutrientes pelo híbrido de mamona lyra
| Autor: | Maurício Dutra Zanotto, Carlos Alexandre Costa Crusciol, Adalton Mazetti Fernandes, Martha Santana do Nascimento |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
produtividade de grãos
uptake curves Extraction (chemistry) Exportation Randomized block design Soil Science Growing season Biology lcsh:S1-972 Horticulture curvas de absorção taxas de absorção Human fertilization Nutrient seed yield Oxisol Botany uptake rates Dry matter lcsh:Agriculture (General) Agronomy and Crop Science Ricinus communis |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Revista Brasileira de Ciência do Solo v.36 n.1 2012 Revista Brasileira de Ciência do Solo Sociedade Brasileira de Ciência do Solo (SBCS) instacron:SBCS Revista Brasileira de Ciência do Solo, Vol 36, Iss 1, Pp 123-124 (2012) |
| ISSN: | 1861-0307 |
| Popis: | Made available in DSpace on 2013-08-12T19:10:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-01 Made available in DSpace on 2013-09-30T17:45:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:20:13Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T13:20:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Information about nutrient extraction and exportation by crops, as well as the periods of highest nutrient demand is important for an adequate fertilization management. However, there are no studies on the nutrient uptake of short-stature hybrid castor bean. Therefore, the purpose of this study was to evaluate nutrient extraction and exportation by short-stature castor bean hybrid Lyra, in the spring-summer and fall-winter growing seasons. The experiments were conducted in the 2005/2006 spring-summer and 2006 fall-winter growing seasons on an Oxisol, in Botucatu, SP, in a randomized block design, with four replications. The plots consisted of plant samplings, which occurred 17, 31, 45, 59, 73, 97 and 120 days after emergence (DAE) in the spring-summer and 17, 31, 45, 59, 80, 100 and 120 DAB in fall-winter growing season. The growth of hybrid Lyra was slow and nutrient uptake lowest between emergence and the beginning of flowering. The period of highest dry matter (DM) accumulation rates and highest nutrient demand were observed 40 to 80 DAE, in both growing seasons. The order of nutrient extraction by the plants in the spring-summer growing season was: N>K>Ca>Mg>S>P>Fe>Mn>Zn>B>Cu>Mo. In fall-winter, S was more absorbed than Mg. Seed yield was higher in the spring-summer (2.995 kg ha(-1)), but nutrient extraction and exportation per ton of seed were similar in both growing seasons. Around 58 % of N and 84 % of P, and approximately half of the S and B absorbed throughout the cycle were exported with the seeds. However, most of the other nutrients accumulated in the plants returned to the soil in plant residues. São Paulo State Univ UNESP, Coll Agr Sci, Postgrad program Agron Agr, São Paulo, Brazil São Paulo State Univ UNESP, Coll Agr Sci, Dept Crop Sci, BR-18610307 Botucatu, SP, Brazil São Paulo State Univ UNESP, Coll Agr Sci, Postgrad program Agron Agr, São Paulo, Brazil São Paulo State Univ UNESP, Coll Agr Sci, Dept Crop Sci, BR-18610307 Botucatu, SP, Brazil |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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