Fenni M, Hani M, Chaker A N
Laboratoire de Valorisation des Ressources Biologiques, Faculté des Sciences Université Ferhat Abbas, Sétif 19000, Algérie.
Commun Agric Appl Biol Sci. 2007;72(2):283-5.
The invasion of the wheat and barley cultures by weeds remains among the major problems of agriculture in Algeria considering the importance of yield tosses caused by these species. The cereal yields average is less than 700 kg ha(-1). The main purpose of this work was to obtain informations on geographical distribution of principal cereal weeds in the setif high plains. Two bioclimatic areas may be distinguished in this region, the semi-arid in the south and the sub-humid in the north. One hundred ten fields of cereals were surveyed by stratified sampling. In each field the level of infestation was scored on a homogeneous surface. The weediness of the species was estimated on the basis of the frequency and average of abundance. The results indicate thirty four important species. This harmful flora was characterized by the prevalence of annual and brod leaved weeds. The study of the geographical distribution cards of these species shows three groups: species related to the northern zone, species related to the southern zone and species common to both zone. The knowledge of the geographical distribution of principal weeds is an essential element for any plan of integrated weed management.
考虑到杂草对阿尔及利亚农业造成的产量损失的严重性，杂草入侵小麦和大麦种植区仍然是该国农业面临的主要问题之一。谷物平均产量低于700公斤/公顷。这项工作的主要目的是获取塞提夫高平原主要谷物杂草地理分布的信息。该地区可分为两个生物气候区，南部为半干旱区，北部为亚湿润区。通过分层抽样对110块谷物田进行了调查。在每块田地中，在均匀的地表上对杂草侵染水平进行评分。根据频率和平均丰度估计物种的杂草性。结果表明有34种重要物种。这种有害植物群的特点是一年生和阔叶杂草占优势。对这些物种地理分布图的研究显示出三组：与北部地区相关的物种、与南部地区相关的物种以及两个地区共有的物种。了解主要杂草的地理分布是任何综合杂草管理计划的基本要素。
