Land disposal potential of tobacco processing residues

Ciência Rural

Bortolon, Leandro¹  Lauschner, Márcio Henrique¹  Kray, Claudio Henrique¹  Tedesco, Marino José¹  Gianello, Clesio¹ 

[1] Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil

关键词: nutrient cycling;    nitrogen;    water quality;   

DOI  :  10.1590/S0103-84782011005000002

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Brazil is one of the leaders in the production and trading of tobacco leaves in the global market, which results in a large amount of residues that would be recycled and used as soil fertilizers in agriculture. This research aimed to study the land disposal potential and agricultural use of tobacco processing residues (TPRs), their mineralization and the nutrient supply to the plants. The study was carried out in an open area using pots with 32dm3 of a sandy soil (Paleudult), provided with water drainage collectors and tilled with three corn plants each. Eighteen treatments were tested with mineral fertilization, poultry manure (PM), earthworm compost (EC) and increasing rates (0, 7.5, 15, 30 e 60t ha-1) of TPR D (dust) and TPR S (stem fibers).Treatments with TPRs (15t ha-1) plus mineral supplementation two by two (NP, NK and PK) were also tested, with four replications each. The experiment started in 01/15/2004 and conducted until 03/16/2004, when corn plants were harvested. The response curves showed that the residues application rates between 15 and 20t ha-1 are most adequate for the studied soil. The results indicated that both TPRs may be important sources of biomass and potash and have potential to be recycled in the soil, supplying part of the macronutrients required for proper plant growth.

【 授权许可】

CC BY-NC