SEWAGE SLUDGE LEVELS ON THE DEVELOPMENT AND NUTRITION OF SUNFLOWER PLANTS

Revista De La Ciencia Del Suelo Y Nutricion Vegetal Pub Date : 2009-01-01 DOI:10.4067/S0718-27912009000300007

Thomaz Figueiredo Lobo, H. G. Filho

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引用次数: 10

Abstract

This study aimed to evaluate the effect of substituting chemical nitrogen (N) fertilization for equivalent N levels from sewage sludge of Wastewater Treatment Plant (WTP) on sunflower plant development. Nutrient levels in physiologically mature leaves and seeds, besides nutrient exportation during a 130-day assay, were also assessed. The experiment was carried out in 100 m 2 permanent plots at Sao Manuel Farm, which belongs to School of Agronomical Sciences, Sao Paulo State University- UNESP, Botucatu, Sao Paulo State, Brazil. The farm is located in the municipality of Sao Manuel, Sao Paulo State. Experimental design was in randomized blocks including 5 treatments and 5 replicates. Treatments were: T1 - chemical N fertilization according to the recommendation for the culture; T2 - 50% N from sewage sludge and 50% N from chemical fertilization; T3 - 100% N from sewage sludge; T4 - 150% N from sewage sludge; T5 - 200% N from sewage sludge. For all treatments, equal amounts of P and K fertilization were applied. Treatments differed for plant height from 21 to 64 days, stem diameter from 28 to 57 days, and leaf number from 21 to 38 days. Seed nutrient levels slightly varied; however, the quantities of exported N, P, Mg, Fe and Zn varied as sewage sludge levels increased.

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污水污泥水平对向日葵植株发育和营养的影响

本研究旨在评价化学氮肥替代污水处理厂污泥等量氮肥对向日葵植株发育的影响。在130天的试验中，除了营养输出外，还评估了生理成熟叶片和种子的营养水平。实验在100 2进行永久性的情节在圣•曼努埃尔•农场,这属于农艺科学学院,圣保罗州立大学——UNESP Botucatu,圣保罗,巴西。该农场位于圣保罗州圣曼努埃尔市。试验设计为随机分组，包括5个处理和5个重复。处理方法为:按栽培推荐施肥T1 -化学施氮;T2 - 50%氮来自污水污泥，50%氮来自化学肥料;T3 - 100%氮来自污水污泥;T4 - 150%污水污泥氮;T5 - 200% N从污水污泥。所有处理均施等量磷钾肥。株高21 ~ 64 d，茎粗28 ~ 57 d，叶数21 ~ 38 d。种子养分水平略有变化;然而，随着污水污泥水平的增加，输出的N、P、Mg、Fe和Zn的数量有所变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Revista De La Ciencia Del Suelo Y Nutricion Vegetal

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