Growth and yield of sugarcane under different phosphorus sources

Revista Brasileira de Engenharia Agrícola e Ambiental

Moura Filho, Gilson³  Costa, José P. V. da³  Santos, Alda C. I. dos³  Santos, Valdevan R. dos¹  Albuquerque, Abel W. de³  Santos, Cícero G. dos² 

[1] UFAL, Arapiraca;UFAL, Rio Largo

关键词: biometric indexes;    plant-cane;    phosphate fertilization    INTRODUÇÃO As principais fontes de fósforo podem ser classificadas;    basicamente;    em solúveis;    pouco solúveis e insolúveis;    as primeiras são prontamente disponíveis;    e por isso mesmo as mais utilizadas para aumentar a quantidade de P disponível para as plantas;   

DOI  :  10.1590/S1415-43662009000400004

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

This work had as its objective in the evaluation of the growth and production of the sugarcare plant under different phosphorus sources. The experiment was carried out in Coruripe, AL, Brazil with 10 fertilizer treatments: 1) Control; 2) NK + micronutrient; 3) Super Phosphate Simple; 4) Triple Super Phosphate; 5) Fosmag; 6) Gafsa; 7) MAP; 8) NPK 06-26-24 (460 kg ha-1); 9) Compost and 10) Simple Super Phosphate - splitdose. The experiment was in random blocks, with four replicates. Parameters evaluated were: number of tillers, height of plants, IAF, rate of stalk growth, rate of biomass production of the stalk, relative growth rate, production and P in leaf and available in soil. P sources did not show any significant influence upon the growth of cane-plant due to the residual effect of previous manuring, with average yield of 80 t ha-1. The triple super phosphate produced the best production in the cane-plant, which presented three growth phases: 1st phase: intense tillering until 120 days after planting (DAP); 2nd phase:intense growth between 120 and 240 DAP; and 3rd phase: maturation, between 240 and 360 DAP. The major growth rate and fresh matter stalk production occurred after intense tillering phase between 120 and 240 DAP.

【 授权许可】

CC BY-NC