Infestation maps and spatial stability of main weed species in maize culture

Planta Daninha

Sousa, E.¹  Instituto Nacional de Investigação Agrária e Veterinária, Oeiras, Portugal¹  Instituto de Agricultura Sostenible Córdoba, España¹  González-Andújar, J.L.¹  Instituto Superior de Agronomia, Lisboa, Portugal¹  Calha, I.M.¹ 

关键词: geo-statistics;    kriging;    precision agriculture;    Chenopodium album;    Echinochloa crus-galli;    Solanum nigrum;   

DOI  :  10.1590/S0100-83582014000200004

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

A study on the spatial distribution of the major weeds in maize was carried out in 2007 and 2008 in a field located in Golegã (Ribatejo region, Portugal). The geo-referenced sampling focused on 150 points of a 10 x 10 m mesh covering an area of 1.5 ha, before herbicide application and before harvest. In the first year, 40 species (21 botanical families) were identified at seedling stage and only 22 during the last observation. The difference in species richness can be attributed to maize monoculture favouring reduction in species number. Three of the most representative species were selected for the spatial distribution analysis: Solanum nigrum, Chenopodium album and Echinochloa crus-galli. The three species showed an aggregated spatial pattern and spatial stability over both years, although the herbicide effect is evident in the distribution of some of them in the space. These results could be taken into account when planning site-specific treatments in maize.

【 授权许可】

Unknown