Popping expansion and yield responses of popcorn cultivars under different row spacings and plant populations

Pesquisa Agropecuária Brasileira

José Antonio De Souza Rossato Junior²  Disnei Amélio Cazetta¹  José Carlos Barbosa¹  Domingos Fornasieri Filho¹ 

[1] ,Faculdade Dr. Francisco MaedaItuverava SP ,Brazil

关键词: Zea mays;    plant density;    popping expansion index;    spatial arrangement;    Zea mays;    densidade de plantas;    índice de capacidade de expansão;    arranjo espacial;   

DOI  :  10.1590/S0100-204X2013001200002

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the agronomic traits and the popping expansion index of three Brazilian popcorn cultivars under different row spacings and plant populations. The trials were performed during two crop seasons, under field conditions. The experimental design used was a randomized complete block, in a split-split plot, with 27 treatments and four replicates. Treatments were represented in a triple factorial arrangement: three row spacings (0.40, 0.60, and 0.80 m), three plant populations (40,000, 60,000, and 80,000 plants per hectare), and three popcorn cultivars (IAC-TC 01, IAC 12, and Zelia). The increase in plant population causes a reduction in the number of grains per ear, lower prolificacy, and grain weight loss. Cultivar grain yield is affected by row spacing and popcorn plant population. Cultivar IAC 12 shows highest grain yield under row spacings of 0.40 and 0.60 m and plant population between 60,000 and 80,000 plants per hectare. The popping expansion index is not affected by row spacing or plant population.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License