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首页> 外文期刊>International Journal of Environment >Weeds distribution and abundance in irrigated fields of White Nile State
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Weeds distribution and abundance in irrigated fields of White Nile State

机译：白尼罗河州灌溉田的杂草分布和丰度

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Field survey was conducted during the summer season of 2011- 2012 to determine the weed flora and weed dominance at the irrigated sites of White Nile State. The State was divided into six irrigated sites from which a total of thirty- five fields were selected and ten quadrates (1m 2 ) from each field were taken randomly. In each quadrate individual weed species were recorded. Field frequency, uniformity and mean field density were also determined for each weed. Fifty five weed species belonging to twenty- four families (three monocotyledonous and twenty- one dicotyledonous) were recorded. Brachiaria eruciformis , Brachiaria reptans , Thunbergia annua and Ipomoea cordofana were the most dominant weed species in most fields. The highest Abundance Index were recorded by Ipomoea cordofana at El Salam and El Dawium counties (208.16 and 116.35) , Brachiaria eruciformis at Um Remta and El Gebalen counties (158.80 and 79.23), Brachiaria reptans at Kosti (116.54) and Momordica balsamina at Gezira Aba county (90.06). Brachiaria eruciformis showed the highest MFD and Uniformity at El Salam and Um Remta Counties (19.11 and 80.00), respectively, and highest frequency value was recorded by Ipomoea cordofana (142.86) at El Salam County. The AI which used as weed survey method is to evaluate the weed management strategies and the change of weed species in weed communities through years. International Journal of Environment Vol.4(4) 2015: 45-61.
机译：在2011-2012年夏季进行了野外调查，以确定White Nile州灌溉点的杂草菌群和杂草优势。该州被划分为六个灌溉地点，从中总共选择了35个田地，并从每个田地中随机抽取10个方格（1m 2）。在每个正方形中，记录了单个杂草物种。还确定了每种杂草的田间频率，均匀性和平均田间密度。记录了25种杂草，它们属于二十四个科（三个单子叶植物和二十一个双子叶植物）。在大多数田地中，最大的杂草种类为：臂状臂虫，臂状臂臂虫，秋葵和番薯。 El Salam和El Dawium县的Ipomoea cordofana（208.16和116.35），Um Remta和El Gebalen县的Brachiaria eruciformis（158.80和79.23），Kosti的Brachiaria rettans（116.54）和Gezira As的Momordica balsamina记录了最高的丰度指数。县（90.06）。臂状臂虫在El Salam和Um Remta县分别显示最高的MFD和均匀度（19.11和80.00），El Salam县的Ipomoea cordofana（142.86）记录的最高频率值。用作杂草调查方法的AI用于评估杂草群落中杂草的治理策略和杂草种类的变化。国际环境杂志Vol.4（4）2015：45-61。

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