Dry matter production and nutrient accumulation after successive crops of lettuce, tomato, rice, and andropogongrass in a substrate with zeolite

Revista Brasileira de Ciência do Solo

Alberto C. De Campos Bernardi²  Marisa Bezerra De Mello Monte¹  Paulo Renato Perdigão Paiva¹  Carlos Guarino Werneck¹  Patrick Gesualdi Haim¹  Fernando De Souza Barros¹ 

[1] ,Embrapa Pecuária SudesteSão Carlos SP

关键词: stilbite;    Lactuca sativa;    Lycopersicum esculentum;    Oryza sativa;    Andropogon gayanus;    slow-release fertilizer;    growth substrate;    estilbita;    Lactuca sativa;    Lycopersicum esculentum;    Oryza sativa;    Andropogon gayanus;    fertilizante de liberação lenta;    substrato de cultivo;   

DOI  :  10.1590/S0100-06832010000200017

来源: SciELO

【 摘 要 】

Zeolites are hydrated crystalline aluminosilicate minerals of natural occurrence, structured in rigid third dimension net that can be used as slow release plant-nutrient source. The main objective of this study was to evaluate the effects of plant growth substrate under zeolite application, enriched with N, P and K, on dry matter yield and on nutrient contents in consecutive crops of lettuce, tomato, rice, and andropogon grass. The experiment was carried out in a greenhouse, with 3 kg pots with an inert substrate, evaluated in a randomized block design with three replications. Treatments consisted of four types of enrichment of concentrated natural zeolite: concentrated zeolite (Z) only, zeolite + KNO3 (ZNK), zeolite + K2HPO4 (ZPK) and zeolite + H3PO4 + apatite (ZP), and a control grown in substrate fertilized with a zeolite-free nutrient solution. Four levels of enriched zeolite were tested: 20, 40, 80, and 160 g/pot. Four successive crops were grown on the same substrate in each pot: lettuce, tomato, rice, and andropogon grass. Results indicated that N, P and K enriched zeolite was an adequate slow-release nutrient source for plants. The total dry matter production of above-ground biomass of four successive crops followed a descending order: ZP > ZPK > ZNK > Z.

【 授权许可】

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