| 周毅,郑猛猛,卢松贺,程昕昕,蒋德,汪建飞,刘正.硫酸锌处理对玉米幼苗养分和锌累积的影响[J].农业环境科学学报,2015,34(1):29-36. |
| 硫酸锌处理对玉米幼苗养分和锌累积的影响 |
| Effects of Zinc Sulfate on Nitrogen, Phosphorus, Potassium and Zinc Accumulation in Different Parts of Maize(Zea mays L.) Seedlings at Germination Stage |
| 投稿时间：2014-05-06 |
| DOI：10.11654/jaes.2015.01.005 |
| 中文关键词: 锌污染 氮磷钾 玉米 发芽 |
| 英文关键词: zinc pollution N, P, and K maize germination |
| 基金项目:国家自然科学基金项目(31101598);安徽省优秀青年科技基金项目(10040606Y02);安徽省省级质量工程项目(2012jyxm416);地方高校国家级大学生创新创业训练计划项目(201210879047) |
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| 中文摘要: |
| 采用0、400、800、1200和1600 mg·L-1 5个硫酸锌浓度(以ZnSO4·7H2O计)的溶液浸泡玉米种子以模拟锌(Zn)污染处理,研究Zn对萌发阶段(第1、4、7、10 d)玉米幼苗胚根、胚芽生物量和养分(氮、磷和钾)累积以及胚乳干物质和养分消耗动态的影响,及其与萌发第10 d的胚根、胚芽和胚乳Zn累积的关系.结果表明,种子中钾的转化速率最快,其次为磷.低于800 mg·L-1的处理,具有刺激玉米胚乳、胚芽和胚根中物质转化,促进幼苗氮、磷和钾养分累积和植株生长的效应;进一步升高Zn的浓度,则对胚乳、胚芽和胚根中的物质转化存在明显的抑制效应.随Zn浓度的增加,胚芽、胚根和胚乳中的Zn累积量均呈线性增高的趋势,Zn在玉米幼苗的分配量为胚乳 > 胚根 > 胚芽,胚根对Zn污染较胚芽敏感;胚乳中氮的残余量与其Zn累积量呈显著的正相关关系(P<0.05).因此,环境中的高浓度Zn,可显著增加萌发阶段的玉米胚乳Zn的累积量,降低其中的氮的转化速率,抑制玉米的生长. |
| 英文摘要: |
| Zinc(Zn) has been demonstrated to inhibit plant growth at excessive amount. The present study was focused on the accumulation in germ and radicle and the depletion in endosperm of maize(Zea mays L.) Zhengdan 958 of nitrogen, phosphorus and potassium under 0~1600 mg·L-1 ZnSO4·7H2O during germination and early seedling growth. Material transformation in all parts of the maize seedlings was strongly inhibited by concentrations of ZnSO4·7H2O above 800 mg·L-1. Potassium in the seeds showed the highest transfer rate, followed by phosphorus. Zinc accumulation in germ, radicle and endosperm increased linearly with Zn concentrations, and was in order of endosperm > radical > germ. Radicle was more sensitive to zinc pollution than germ. In the endosperm, nitrogen residues were positively related to zinc accumulation(P<0.05). Toxic effect of Zn on maize germination was probably due to reduced nitrogen mobilization caused by high zinc accumulation in the endosperm. |
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