Morphogenic parameters and productivity of grass-Pioneer subjected to nitrogen

Semina: Ciências Agrárias

Flávio Pinto Monção¹  Daniela Alves Pereira¹  Polyanna Mara de Oliveira¹  Eleuza Clarete Junqueira de Sales¹  Sidnei Tavares dos Reis¹  Verônica Aparecida Costa Mota¹  Dorismar David Alves¹  Bernado Silveira Lobo¹  João Paulo Sampaio Rigueira¹ 

[1] Universidade Estadual de Montes Claros;

关键词: Leaf appearance;    Pennisetum purpureum;    Phyllochron;    Stem elongation;   

DOI  :  10.5433/1679-0359.2014v35n6p3305

来源: DOAJ

【 摘 要 】

Objective of this work by evaluating the effect of nitrogen on forage yield and morphogenesis of elephant grass cv. Pioneer. The experimental design was randomized blocks with five replications, totaling 20 experimental units. Treatments consisted of four nitrogen levels (100, 200, 300 and 400 kg ha-1 yr-1). The experiment was conducted under irrigated conditions. Evaluative cuts were made at 50 cm soil with values of light interception (95%) without pre-defined intervals. It was observed that N fertilization increased significantly (P<0.05) the production of dry matter per hectare, leaf appearance rate (leaves days -1tiller-1), leaf elongation rate (cm tiller-1 day-1) and stem elongation rate (cm day-1). The process of this forage senescence is accelerated with increasing doses of nitrogen and leaf appearance rate, thereby reducing the phyllochron. It required a study on the economic viability of higher doses of nitrogen in grazed elephant grass cv. Pioneer.

【 授权许可】

Unknown