Plant population and row spacing on biomass sorghum yield performance

Ciência Rural

Gravina, Geraldo de Amaral²  Fernandes, Pedro Gonçalves¹  Souza, Vander Fillipe de⁴  May, Andre³ 

[1] Petrobras Biocombustível, Rio de Janeiro, Brasil;Universidade Estadual do Norte Fluminense, Campos de Goytacazes, Brazil;Embrapa Milho e Sorgo, Sete Lagoas, Brazil;Universidade Federal de São João del-Rei, São João Del Rey, Brasil

关键词: lignocellulosic sorghum;    plant spacing;    seeding density;    bio-energy;    cultural management;   

DOI  :  10.1590/0103-8478cr20141133

学科分类：农业科学（综合）

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

【 摘 要 】

:Biomass sorghum is one of the most promising crops for the production of electricity through the burning in high-pressure boilers, due to its high calorific value, high yield, seed propagation, short cycle, and to the possibility of full mechanization of its agricultural processes. However, there is still a lack of information about its cultural practices. To this end, this research aimed to evaluate the influence of row spacing and plant population on the yield performance of biomass sorghum. The experimental design was a randomized block, in factorial scheme of 4 x 4, with four row spacings (0.5, 0.7, 0.9 and 1.1m), and four plant populations (80,000; 100,000; 120,000 and 140,000 plants ha-1), with three replications. The characteristics evaluated were: plant height, stem diameter, number of leaves, number of tillers per plant, fresh weight per plant and biomass. Total biomass yield was greatly influenced by the row spacing, showing a sharp reduction when row spacing increased, in the two years of study, changing from 180.27 to 114.42t ha-1 in the 2012/13 crop year, and from 146.50 to 102.56t ha-1 in the 2013/14 crop year, for 0.5 and 1.1m between rows, respectively. The lowest yields observed in the second year of the study were due to unfavorable weather conditions in the period.

【 授权许可】

Unknown