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不同覆盖对棉田棉蚜和棉叶螨及其天敌种群动态的影响/Population Dynamics of Cotton Aphids,Cotton Spider Mites and Natural Enemies in the Fields with Different Coverings[J]
Authors
HE Huan
TIAN Chang-yan
+6 more
WANG Lin-xia
中国科学院,新疆生态与地理研究所,新疆,乌鲁木齐,830011
中国科学院,研究生院,北京,100049
王林霞
田长彦
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Publication date
1 January 2011
Publisher
Abstract
通过田间调查,比较露地、窄膜、宽膜、全膜和秸秆覆盖下主要棉田害虫和天敌种群动态.结果表明,不同覆盖方式对棉蚜种群动态影响很大,除窄膜和宽膜覆盖之间差异不显著外,其他覆盖差异均达到极显著,7月16日全膜和秸秆覆盖达峰值,比露地、窄膜和宽膜覆盖早5 d;高峰时全膜覆盖棉蚜数量分别是露地、窄膜、宽膜和秸秆覆盖的2.56、1.78、2.16倍和5.93倍.对棉叶螨种群动态影响不同于棉蚜,整个调查期,窄膜、宽膜和全膜之间无论从数量还是增长速率来看都呈相似趋势,而秸秆覆盖棉田棉叶螨数量显著高于其他覆盖,高峰时分别高出露地、窄膜、宽膜和全膜覆盖9 584.4、7 816.4、7 540.4头/百株和8 436.8头/百株.不同覆盖下主要天敌种类基本一致,但种群变化并没有明显的规律
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Last time updated on 29/11/2016