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夏玉米子粒收获期判定方法研究 被引量:27
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作者 杨国航 张春原 +3 位作者 孙世贤 刘春阁 王卫红 赵久然 《作物杂志》 CAS CSCD 北大核心 2006年第5期11-13,共3页
夏玉米子粒收获期判定指标研究结果表明:当子粒黑层形成(达到生理成熟)时,子粒含水量在33%左右,果穗苞叶完全苍皮,可作为收获期标准。个别品种稍有差异。子粒乳线位置年际间变化较大,不能充分反映生理成熟状况。试验操作中,判断夏玉米... 夏玉米子粒收获期判定指标研究结果表明:当子粒黑层形成(达到生理成熟)时,子粒含水量在33%左右,果穗苞叶完全苍皮,可作为收获期标准。个别品种稍有差异。子粒乳线位置年际间变化较大,不能充分反映生理成熟状况。试验操作中,判断夏玉米子粒生理成熟期的简单方法是果穗苞叶达到完全苍皮后,查看果穗中部子粒黑层是否出现。如果出现,即确定其达到生理成熟。大田生产中,当果穗苞叶完全苍皮,中部子粒黑层出现后,应适当延时收获,有利于光合产物继续向未达到成熟的子粒输送,并可有效降低子粒含水量,避免收获后不易储藏,发生粒腐。 展开更多
关键词 玉米 成熟 黑层 苍皮 收获期
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Spatiotemporal Distribution of Phlebotomine Sand Flies (Diptera: Psychodidae) in a Focus of Cutaneous Leishmaniasis in Foum Jamaa (Azilal, Atlas of Morocco)
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作者 Hassan Arroub Abdelaaziz Alaoui +2 位作者 Hicham El Miri Meryem Lemrani Khalid Habbari 《Journal of Life Sciences》 2012年第10期1124-1132,共9页
An entomological survey of Phlebotomine sand flies (Diptera: Psychodidae) was carried out in three sectors of Foum Jamgta region (province of Azilal, Morocco) during the year 2010. Morphological identification wa... An entomological survey of Phlebotomine sand flies (Diptera: Psychodidae) was carried out in three sectors of Foum Jamgta region (province of Azilal, Morocco) during the year 2010. Morphological identification was performed on a total of 1,152 sand flies (23% females and 77% males) collected by sticky paper traps. 80% of the total collected flies were identified as Phlebotomus (Paraphlebotomus) sergenti (Parrot) (57%) and Phlebotomus (Larroussius) longicuspis (Nitzulescu) (23%). In addition to these dominant species, four other species were found, Phlebotomus (Phlebotomus) papatasi (Scopoli), Sergentomyia (Sergentomyia) minuta (Rondani), Phlebotomus (Larroussius) perniciosus (Newstead) and Phlebotomus (Paraphlebotomus) chabaudi (Croset). Overall, the population dynamics show a yearly bimodal pattern related to rainfall and temperature, and with high density around human dwellings. The spatiotemporal distribution of sand fly species was helpful to discuss strategies that might be useful in controlling cutaneous leishmaniasis transmission in this endemic focus. 展开更多
关键词 Phlebotomine sand flies cutaneous leishmaniasis temporal and spatial distribution Foum Jamaa Morocco.
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