共查询到19条相似文献,搜索用时 78 毫秒
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亚麻是平播密植作物,杂草对它为害很大,一般亚麻田每平方米有杂草100-200株,不仅影响产量,而且收获后往往因麻把内夹有杂草而造成亚麻霉烂,降低品质。广大社员为提高亚麻产量和品质,增加收入,多在苗期进行1-2次人工拔草。每垧用工20-30个,但杂草仍拔不净,且每拔一次草伤苗5-6%,迫切希望应用化学剂除草。近几年来, 相似文献
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亚麻是平播密植作物,亚麻田中的杂草直接影响亚麻生长,降低纤维品质。广大社员为提高亚麻产量和品质,增加收入,在苗期进行1-2次人工拔草,但每拔一次杂草都要伤苗5—6%。因此,麻田杂草是亚麻生产上急待解决的问题。为了解决麻田杂草丛生,我所从1980—1983年进行了亚麻田间化学除草试验研究,从20多种除草剂中筛选出拿扑净和二甲四氯复合配方除草效果较好, 相似文献
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本文对亚麻田间杂草的种类、密度和生长发育等情况进行了综述。针对亚麻田间杂草种类多,密度大,草害严重等诸多问题,提出了亚麻田间杂草的综合防治技术措施。 相似文献
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本文阐述了新疆甜菜田杂草种群结构、消长规律及危险性,提出了以“农业措施为基础、化学除草为中心、人工除草为补充”的综合防治措施:一是合理轮作;二是土地深翻将杂草种子埋于土壤深层;三是清除田边、地头、渠边杂草,以免种子传播;四是地膜覆盖栽培甜菜可制约杂草生长;五是科学合理轮换使用化学除草剂。 相似文献
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冬季亚麻杂草种类危害及防除研究 总被引:1,自引:0,他引:1
本文调查研究了州内亚麻种植地区的田块杂草种类、分布和发生规律。查清杂草共有101种,隶属25科,发生危害重的有7科26种,占25.74%;双子叶杂草77种,占76.23%,单子叶杂草22种,占21.78%,蕨类杂草2种,占1.98%。一年生杂草42种,占42.58%,越年或一年生杂草29种,占28.7l%,多年生杂草30种,占29.7l%。杂草随亚麻的播种而生长,至枞形期达最高峰,88—1231株/m^2。防治上在亚麻枞形期(株高5—10cm)、杂草2—3叶期选择50%敌草隆+5%精喹禾灵或50%敌草隆+56%二甲四氯钠盐,兑水喷雾,防除效果达90%以上。 相似文献
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亚麻田几种常见杂草的鉴别及其防除 总被引:1,自引:0,他引:1
亚麻是黑龙江省垦区农业种植结构调整的主要作物,现亚麻种植面积占全省的2/3。但该区域农田开垦年限较短,杂草基数大,种类多,严重的草荒,影响亚麻产质量和机械作业,束缚了该区亚麻的发展。本文重点阐述亚麻田几种常见难以防治的杂草的鉴别和防治方法,对该地区亚麻发展有重要的指导意义。 相似文献
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The demand for rice to meet the dietary need in low-income countries is expected to witness an exponential rise as the population increases. Meeting the rice demand domestically has remained challenging due to significant yield loss caused by several biotic and abiotic factors. Among these factors, one of the most important is the high weed pressure that ravages the upland rice ecology. In Nigeria, several independent weed control techniques, such as physical, chemical and cultural methods, have been recommended and adopted for weed control across varying rice upland ecologies. However, outcomes of these approaches when used independently have not consistently led to an increase in yield. There remains an outstanding deficit between the actual yield and the potential rice yield. This review aimed to identify potential research gaps, and quest effective and sustainable weed management strategies in smallholder upland rice farming systems in Nigeria. A critical analysis of studies suggests the potential of sustainable weed management practices if adopted and adapted smartly in different upland ecologies in Nigeria. Competitiveness of upland rice against weeds can be enhanced through strategic integration of weed competitive cultivars, optimum nitrogen application timings (within weed-free periods), uniform plant spacing, and high seeding rates, with conventional herbicide/manual weed control practices. However, such management practices can only be engaged where inputs are supplied on time and the technical know-how is extended to farmers. The review equally highlights potential research gaps for further studies. 相似文献