硼素对甜菜植株全硼影响的研究

研究不同硼供应水平下甜菜植株硼营养吸收规律，为甜菜生产实践硼肥施用提供理论依据。以甜菜单粒种HI0099为试验材料，在水培条件下，设置十分缺乏（T1，0.05mg/L）、缺乏（T2，0.5mg/L）、正常（T3，2.0mg/L）及过量毒害（T4，30.0mg/L）4个硼营养浓度，利用甲亚胺比色法对甜菜植株全硼含量进行测定，分析甜菜全硼含量变化与不同供硼营养之间的关系。结果表明：不同硼素营养处理后各时期同一部位硼含量均表现为硼素毒害处理＞硼素正常处理＞硼素缺乏处理＞硼素十分缺乏处理；同一处理不同部位硼含量趋势表现相同，均为成熟叶片＞幼叶片＞成熟叶柄＞幼叶柄＞根。综合分析说明，植株硼含量受硼营养水平影响显著，随着硼供应的增加而增加，且成熟叶片需硼量最大，对硼供应水平最敏感，因此甜菜生产中根外追肥为简单有效补充硼营养的一种方法。

Effect of Boron on Total Boron Content in Sugar Beet Plant

In order to support the theoretical basis of sugar beet production practice under boron application, the experiment was to study the nutrition absorbing rule in sugar beet plant under different boron levels. Under water culture condition, sugar beet seed HI0099 was selected as experimental material. Four nutrition concentrations of boron were set: very deficiency(T1,0.05 mg/L), deficiency (T2,0.5 mg/L), normal(T3,2.0 mg/L),excessive toxicity(T4,30.0 mg/L).Azomethine-h colorimetric method was used to measure the boron content of sugar beet and to analyze the relationship between boron content variety of sugar beet and different boron nutrition. The result showed that with different boron nutrition treatments, boron content of the same part under different stages presented:boron toxicity treatment > boron normal treatment> boron deficiency treatment> boron very deficiency treatment; Boron content in different parts under the same treatment presented the same rule: mature leaves>immature leaves > mature petioles > immature petioles> roots. From above showed the influence of boron nutrition levels on plant boron content was obvious. With the increase of boron increasing plant boron content, the mature leaves demanded boron to the maximum and they were the most sensitive to boron levels. So outroot feeding was an very effective method in sugar beet production.