Weed seeds predation in cultivaded fields

Ciência Rural

Rizzardi, Mauro Antonio²  Balbinot Jr., Alvadi Antonio²  Agostinetto, Dirceu²  Fleck, Nilson Gilberto¹ 

[1] UFRGS, Porto Alegre;Universidade Federal do Rio Grande do Sul

关键词: biological management;    predators;    seed bank;    enviromental factors;    crop management;   

DOI  :  10.1590/S0103-84782002000400027

学科分类：农业科学（综合）

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

【 摘 要 】

In investigating ecological relations among species, it has been observed that various animals, mainly insects, feed on weed seeds before and after their dehiscence, reducing seed replenishment in the soil and total amount of propagules available for future germination. Under favorable conditions for predation activity, consumption of seeds can be quite high, reaching as much as 90% of total seeds produced. This process depends, basically, on environmental conditions and on management practices adopted, as soil preparation method, crop species, crop density and spacing, and on the size of cultivated area. Therefore, seed predation is an important natural tool to be used in integrated weed management. Nevertheless, seed predation requires additional studies in order to elucidate more consintently the factors involved in the regulation of seed consumption process, and through this elucidation, to guide adoption of cultural practices which could increase occurrence intensity of this biological method of weed management.

【 授权许可】

CC BY-NC