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农学学报 ›› 2015, Vol. 5 ›› Issue (11): 26-29.doi: 10.11923/j.issn.2095-4050.cjas15020003

所属专题: 油料作物

• 植物保护 • 上一篇    下一篇

不同栽培密度对大豆菌核病病情指数的影响

顾鑫   

  1. 黑龙江省农业科学院佳木斯分院
  • 收稿日期:2015-02-03 修回日期:2015-03-10 接受日期:2015-03-24 出版日期:2015-11-19 发布日期:2015-11-19
  • 通讯作者: 顾鑫 E-mail:guxin1111
  • 基金资助:
    公益性行业(农业)科研专项“油料作物菌核病综合防控技术研究”(201103016-03A2)。

Effects of Different Planting Densities on Soybean Sclerotinia Stem Rot Disease Index

  • Received:2015-02-03 Revised:2015-03-10 Accepted:2015-03-24 Online:2015-11-19 Published:2015-11-19

摘要: 为明确不同大豆栽培密度下菌核病的病情指数及主要影响因子之间的相关性,于2014 年设3 个密度处理,分别为:25 万株/hm2、30 万株/hm2、35 万株/hm2,在大豆花期测定田间平均土壤湿度、平均土壤温度、茎秆强度、茎秆粗度、菌核子囊盘萌发个数5 个影响因子及8 月末大豆菌核病病情指数,采用通径分析的方法分析这些因子之间的关系。结果表明:大豆密植尽管增产,但病情指数提高了,其主要原因是茎秆强度的减弱及子囊盘萌发个数的增多导致了菌核病发生严重,以后在密植的生产田中如果田间子囊盘萌发过多,应对菌核病多加注意。

关键词: 土壤改良材料, 土壤改良材料, 粘质盐土, 土壤物理性状, 黄河三角洲, 棉花产量

Abstract: The study aims to determine the correlation between the disease index of Sclerotinia sclerotiorum and the main influencing factors of different soybean planting densities. The test set up 3 density treatments in 2014, 25×104 strains/hm2, 30×104 strains /hm2 and 35×104 strains /hm2. The average soil moisture, average soil temperature, stem strength, stem diameter, germination number of sclerotium apothecium and the Sclerotinia sclerotiorum disease index were investigated at the end of August. The path analysis was used to analyze the Sclerotinia sclerotiorum index and data processed. The results showed that, although the production increased under high density planting of soybean, the disease index also increased. The main reason was the weakening of stem strength and the increase of germination number of apothecium, which led to severe occurrence of Sclerotinia sclerotiorum. In the future, close attention should be paid to Sclerotinia sclerotiorum in case of large germination amount of apothecium in high density planting of soybean.

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