Nutrient cycling in a RRIM 600 clone rubber plantation

Scientia Agricola

Marcos Roberto Murbach²  Antonio Enedi Boaretto¹  Takashi Muraoka¹  Euclides Caxambu Alexandrino De Souza¹ 

[1] ,UNESP FCAV Depto. de Produção VegetalJaboticabal SP ,Brasil

关键词: litterfall;    fertilization;    nutrition;    rubber;    nutrient exportation;    serapilheira;    adubação;    nutrição;    borracha;    exportação;   

DOI  :  10.1590/S0103-90162003000200021

来源: SciELO

【 摘 要 】

Few reports have been presented on nutrient cycling in rubber tree plantations (Hevea brasiliensis Muell. Arg.). This experiment was carried out to evaluate: the effect of K rates on the amount of nutrients transfered to the soil in a 13-year old Hevea brasilensis RRIM 600 clone plantation, nutrient retranslocation from the leaves before falling to the soil, and nutrient loss by dry rubber export. The experiment started in 1998 and potassium was applied at the rates of 0, 40, 80 and 160 kg ha-1 of K2O under the crowns of 40 rubber trees of each plot. Literfall collectors, five per plot, were randomly distributed within the plots under the trees. The accumulated literfall was collected monthly during one year. The coagulated rubber latex from each plot was weighed, and samples were analyzed for nutrient content. Increasing K fertilization rates also increased the K content in leaf literfall. Calcium and N were the most recycled leaf nutrients to the soil via litterfall. Potassium, followed by P were the nutrients with the highest retranslocation rates. Potassium was the most exported nutrient by the harvested rubber, and this amount was higher than that transfered to the soil by the leaf literfall.

【 授权许可】

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