南方土壤中导致大豆皱叶的因子分析
- Title:
- Analysis of Factors Causing Soybean Crinkle Leaf in Southern China Soil
- 摘要:
- 为找出南方大豆皱叶症发生的诱因,本研究从南方土壤中非生物因素和生物因素两个角度进行探索研究。利用混池法和ICP-OES技术研究正常叶混池和皱叶混池的差异元素,利用构建的皱叶残留异质系中皱叶家系材料GY_C和正常叶家系材料GY_N,采用单因素随机区组试验设计,研究皱叶土壤的不同土层、营养液、灰烬、叶浆,进行土壤浸泡液、土壤消毒、氮肥等处理后大豆皱叶材料皱叶症的变化。结果表明:皱叶环境土壤的表层、中层和底层土均可导致GY_C叶片皱缩,中层土中的GY_C叶片皱缩程度略高于表层和底层土。氮磷钾配比失衡的营养液处理GY_C叶片未发生皱缩。ICP-OES分析皱叶混池E1和正常叶混池E0的31种元素后,未发现E1/E0比值为1.7倍以上的元素,且E1中锰元素含量低于E0。皱叶灰烬及土壤浸泡液处理基质后GY_C叶片未发生皱缩。移栽试验表明,南方土壤和基质比例超过3∶1时GY_C长出的新叶依然皱缩,而复种的盆栽中南方土壤和基质比例低于1∶8时GY_C叶片也会发生皱缩,且随着复种次数增加,皱叶程度有所增加。解剖观察皱叶材料的根、茎、叶柄未发现明显的虫害痕迹。-80,60,80,100和120 ℃处理的南方土壤中GY_C叶片不发生皱缩。综上所述,南方土壤中的微生物因素可能是导致大豆皱叶的关键因子。
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