Biomass Accumulation and its Relationship with the Demand and Concentration of Nitrogen, Phosphorus, and Potassium in Lettuce

Autor:	Joaquín Ortiz, Juliana Padilla, Jorge D. Etchevers, Anacleto Sosa
Rok vydání:	2012
Předmět:	chemistry.chemical_classification Potassium Phosphorus food and beverages Soil Science chemistry.chemical_element Greenhouse Biomass Lactuca Biology biology.organism_classification Nitrogen Nutrient Agronomy chemistry Organic matter Agronomy and Crop Science
Zdroj:	Communications in Soil Science and Plant Analysis. 43:121-133
ISSN:	1532-2416 0010-3624
DOI:	10.1080/00103624.2012.634695
Popis:	Lettuce (Lactuca sativa L.) has a short cultivation cycle and a rare growth pattern. The nutritional management program of this species must be designed before its establishment in field or greenhouse. There are two scientifically based methods to design its fertilization management: the simplified rational model and the dynamics of nutritional accumulation. There is not much information to input into these methods. The present study reports about the biomass accumulation pattern of lettuce, cv. Coolward, and its relationship with the demand and concentration of nitrogen (N), phosphorus (P), and potassium (K). The study was conducted in a greenhouse with a slightly acidic sandy-loam substrate (pH 6.5) and a medium/high content of organic matter and nutrients. Twenty-one replicates were set in pots with increasing amounts of soil, depending on the time of harvest. Nine samplings were conducted from emergence up to commercial maturity (MC) (0–65 days after emergence, DDE). The plants collected were divided ...
Databáze:	OpenAIRE
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