| 不同栽培密度对大豆菌核病病情指数的影响 |
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| 引用本文： | 顾鑫.不同栽培密度对大豆菌核病病情指数的影响[J].农学学报,2015,5(11):26-29. |
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| 作者姓名： | 顾鑫 |
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| 作者单位： | 黑龙江省农业科学院佳木斯分院 |
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| 基金项目： | 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)。 |
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| 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。
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| 关 键 词： | 大豆菌核病 栽培密度 病情指数 通径分析 |
| 收稿时间： | 2015/2/3 0:00:00 |
| 修稿时间： | 2015/3/10 0:00:00 |
Effects of Different Planting Densities on Soybean Sclerotinia Stem Rot Disease Index |
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| 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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| Keywords: | Soybean Sclerotinia Sclerotiorum Planting Density Disease Index Path Analysis |
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