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大豆科学  2009 

不同作物茬口对连作大豆产量及农艺性状的影响

DOI: 10.11861/j.issn.1000-9841.2009.01.0072, PP. 72-75

Keywords: 大豆,连作,苜蓿茬,玉米茬

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Abstract:

为利用轮作换茬措施缓解连作大豆的危害和产量损失,研究了苜蓿、玉米和大豆3种作物茬口对连作大豆产量和农艺性状的影响。结果表明:苜蓿茬3年连作大豆比玉米茬3年连作大豆增产10.4%,比4年连作大豆极显著增产26.7%;玉米茬3年连作大豆比4年连作大豆显著增产14.7%。与4年连作大豆相比,苜蓿茬和玉米茬连作3年大豆的株高分别增加16.6cm和14.7cm、单株粒重分别增加7.0g和3.7g,差异均达极显著;苜蓿茬和玉米茬处理间的株高、单株粒重差异不显著。4年连作大豆的病粒率分别比苜蓿茬和玉米茬3年连作大豆的病粒率高4.54%和6.74%,差异达显著和极显著;苜蓿茬、玉米茬处理间的病粒率差异不显著。三个茬口处理之间大豆虫食粒率差异不显著。可见,对于连作大豆,苜蓿茬口优于玉米茬口和大豆茬口。

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