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首页> 外文期刊>Weed Technology >Absence of Interactive Responses of Early Soybean (Glycine max) Growth to Soybean Cyst Nematode (Heterodera glycines), Postemergence Herbicides, and Soil pH and Texture1
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Absence of Interactive Responses of Early Soybean (Glycine max) Growth to Soybean Cyst Nematode (Heterodera glycines), Postemergence Herbicides, and Soil pH and Texture1

机译：早期大豆（大豆最大生长）对大豆囊肿线虫（Heterodera甘氨酸），出苗后除草剂以及土壤pH和质地的相互作用没有响应 1

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摘要

Farmer observations and previous studies indicated that reductions in soybean yield caused by the soybean cyst nematode (SCN) are greater when other stresses, biotic or abiotic, are present. Also, it has been reported that the effect of SCN on soybean growth depended on factors such as soil pH, soil texture, and herbicides. Although postemergence herbicides may adversely affect soybean metabolism, acifluorfen can reduce SCN infection. The objective of the present study was to determine the main and interactive effects of SCN egg population density (SCND), soil pH, soil texture, and the application of the herbicides acifluorfen, glyphosate, and imazethapyr on early soybean growth. Greenhouse studies assessed different combinations of these factors for 65 d after planting. No interactions were observed for any of the main effects. Soil pH and texture did not affect soybean growth. SCND was the only main effect that explained soybean growth reductions. The effect of SCND on soybean growth was exhibited as 15–50% decreases of leaf area index (LAI) and dry weight in all cases, but reductions in plant height also were observed. No relationship between SCND and the number of SCN eggs recovered at the end of the experiment was observed. Herbicides did not reduce soybean growth, although acifluorfen consistently caused the highest soybean injury reaching 18–20% from 1–14 days after application (DAA). At 50 DAA, acifluorfen injury was negligible, and soybean LAI and dry weight did not differ from the nontreated control. These results indicated that the effect of SCN on soybean growth was not directly affected by the other evaluated main effects. Therefore, trends observed in the field that suggested interactions between those factors are likely the result of other factors not considered in the present study or to more complex relationships between factors analyzed in the present study and other elements present in the field.
机译：农民的观察和先前的研究表明，当存在其他生物或非生物胁迫时，由大豆囊肿线虫（SCN）引起的大豆产量下降幅度更大。另外，据报道SCN对大豆生长的影响取决于诸如土壤pH，土壤质地和除草剂的因素。尽管出苗后除草剂可能会对大豆的代谢产生不利影响，但阿昔洛芬可以减少SCN感染。本研究的目的是确定SCN卵种群密度（SCN D ），土壤pH值，土壤质地以及除草剂acifluorfen，草甘膦和咪唑乙烟的主要相互作用和交互作用大豆早期生长。温室研究评估了这些因素在种植后65 d的不同组合。没有观察到任何主要影响的相互作用。土壤的pH和质地不会影响大豆的生长。 SCN D 是解释大豆生长下降的唯一主要作用。在所有情况下，SCN D 对大豆生长的影响表现为叶面积指数（LAI）和干重降低15-50％，但也观察到株高降低。在实验结束时未观察到SCN D 与SCN卵数之间的关系。除草剂并没有降低大豆的生长，尽管在使用后的1-14天（DAA），acifluorfen一直造成最高的大豆伤害，达到18-20％。在50 DAA时，acifluorfen伤害可忽略不计，大豆LAI和干重与未处理的对照无差异。这些结果表明，SCN对大豆生长的影响不受其他评估的主要影响的直接影响。因此，在该领域中观察到的趋势表明这些因素之间的相互作用可能是本研究中未考虑的其他因素的结果，或者是本研究中分析的因素与该领域中其他要素之间更复杂的关系的结果。

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  • 来源
    《Weed Technology》 |2005年第4期|p.847-854|共8页
  • 作者

    RAMON G. LEON MICHEAL D. K. OWEN DAVID H. SOH and GREGORY L. TYLKA;

  • 作者单位

    Assistant Professor, Horticulture and Crop Science Department, California Polytechnic State University, San Luis Obispo, CA 93407;

    Professor, Department of Agronomy, Iowa State University, 2104 Agronomy Hall, Ames, IA 50011;

    Research Associate and Professor, Department of Plant Pathology, Iowa State University, 351 Bessey Hall, Ames, IA 50011. Corresponding author's E-mail: mdowen@iastate.edu;

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  • 关键词

    Herbicide injury; nematode infection.;

    机译：除草剂伤害;线虫感染。;

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