电场处理与介电分选对棉种发芽率和幼苗质量的影响

为研究电场处理和介电分选对包衣棉种发芽率与幼苗质量的影响，该文利用芒刺电极在-16 kV（DC）下对棉种进行不同时间的高压电场处理，结果显示，处理40 s后棉种的发芽率和幼苗质量显著提高；并利用介电分选机在不同的分选电压下对棉种进行介电分选，结果发现，当分选滚筒转速为20 r/min、分选电压为-6 kV（DC）时，分选获得的I级棉种的发芽率和幼苗质量显著提高。在上述最优条件下，先利用芒刺电极对棉种进行电场处理，再利用介电分选机对电场处理后的棉种进行介电分选，结果表明：棉种的发芽率和幼苗质量显著高于未处理试样的发芽率和幼苗质量，并且也高于单独电场处理或介电分选时的发芽率和幼苗质量。这为开发新型种子处理与分选设备提供了依据。

Effects of electric field processing and dielectric separation on cotton seed germination rate and seedling mass

In order to explore the effects of the electric field processing and dielectric separation on the germination rate and the seedling mass of coated cottons, an electric field processing test was conducted with an arista electrode at a voltage of -16 kV (DC). The results showed that the germination rate and the seedling mass of the cotton seed were significantly improved. In addition, a dielectric separation was performed with an dielectric separator at the different separating voltage, and the results also showed that the germination rate and the seedling mass of the Class A cotton seed significantly increased when the rotating speed of the separating roller was of 20 r/min and the selecting voltage was of -6 kV (DC). It was also found that both the germination rate and the seedling mass of the seed which was firstly processed with the electric field and then separated with the dielectric separator under the above optimum conditions were significantly higher than that of the seed which was solely processed with the electric field or separated with the dielectric separator. It will provide a foundation for developing a new processing and separating device, it has a great significance for agricultural production.