[Objective] The effects of special plant nutritional elements on honey pomelo fruits were investigated. [Method] After the honey pomelo flowers faded, the special plant nutritional elements （SPNE） were sprayed on th...[Objective] The effects of special plant nutritional elements on honey pomelo fruits were investigated. [Method] After the honey pomelo flowers faded, the special plant nutritional elements （SPNE） were sprayed on the honey pomelo plants. After an interval of 20 d or more, the SPNE were sprayed again. A total of 4 times of spraying were carried out before the harvesting. Then difference in yield, quality, fruit weight, fruit appearance, ball weight and internal characteristics were compared between the SPNE treatment group and the control group. [Result] Compared to that of the control group, the fruit number per plant of the SPNE treatment group was more, and the average fruit weight was higher, resulting in the higher yield in the SPNE treatment group. At the same time, the vitamin C and soluble solids con- tent in honey pomelo fruits of the treatment group was higher than that of the con- trol group. The quality of honey pomelo fruits was higher in the SPNE treatment group. The honey pomelo fruits treated with SPNE were bigger, more shining and cleaner. The fruits in the treatment group had no scar, but had more beautiful shape. The exocarp of the treatment group was thinner than that of the control group. The ball weight of the treatment group was higher than that of the control group. Moreover, the ball appearance of the treatment group was cleaner. In the treatment group, the pulp segments were bigger and more consistent in size. In ad- dition, there were no internal cracks in the pulp segments. The fruits of the treat- ment group were more sparkling and more transparent. They tasted better. [Con- clusion] We hoped to provide a theoretical basis for the high-quality and high-yield- ing production of honey pomelo.展开更多
Biochemical mechanism of forming the red tide is discussed in this paper. The existence of a large number of nitrates and phosphates in the eutrophic water is the prerequisite of explosive increase of algae and the fo...Biochemical mechanism of forming the red tide is discussed in this paper. The existence of a large number of nitrates and phosphates in the eutrophic water is the prerequisite of explosive increase of algae and the forming of red tide. Reduction of eutrophication is an important approach to preventing the red tide. The method of deep treatment of the waste water and its denitrification and dephosphorization are introduced, and a new opinion on the red tide formation and fundamental prevention is put forward.展开更多
Advertising and sales promotion have significant impact on raising customer awareness. They are tools by which customers become acquainted with new and innovative products and services of the companies. Despite the im...Advertising and sales promotion have significant impact on raising customer awareness. They are tools by which customers become acquainted with new and innovative products and services of the companies. Despite the importance of these tools in increasing sales, it is not easy to evaluate their effect on sales. One of the problems confronted by the marketing managers is the determination of a clear relationship between the effectiveness of advertising and sales promotion on profitability. In this article, considering the relationship between these tools and brand equity, we have attempted to determine the relationship between effectiveness of these two factors and profitability. Next, a system dynamics model for representing the effects of marketing communication tools on company profitability is offered. Finally, using the data from a corporation and the numeric values related to each of the elements in the model, an attempt has been made to determine a number representing the magnitude of the effect of advertising and sales promotion on the corporation＇s revenue and profitability and to draw the respective curves related to the effects of these two factors.展开更多
基金Supported by the Serving Economic and Social Development Program of Guangzhou University~~
文摘[Objective] The effects of special plant nutritional elements on honey pomelo fruits were investigated. [Method] After the honey pomelo flowers faded, the special plant nutritional elements （SPNE） were sprayed on the honey pomelo plants. After an interval of 20 d or more, the SPNE were sprayed again. A total of 4 times of spraying were carried out before the harvesting. Then difference in yield, quality, fruit weight, fruit appearance, ball weight and internal characteristics were compared between the SPNE treatment group and the control group. [Result] Compared to that of the control group, the fruit number per plant of the SPNE treatment group was more, and the average fruit weight was higher, resulting in the higher yield in the SPNE treatment group. At the same time, the vitamin C and soluble solids con- tent in honey pomelo fruits of the treatment group was higher than that of the con- trol group. The quality of honey pomelo fruits was higher in the SPNE treatment group. The honey pomelo fruits treated with SPNE were bigger, more shining and cleaner. The fruits in the treatment group had no scar, but had more beautiful shape. The exocarp of the treatment group was thinner than that of the control group. The ball weight of the treatment group was higher than that of the control group. Moreover, the ball appearance of the treatment group was cleaner. In the treatment group, the pulp segments were bigger and more consistent in size. In ad- dition, there were no internal cracks in the pulp segments. The fruits of the treat- ment group were more sparkling and more transparent. They tasted better. [Con- clusion] We hoped to provide a theoretical basis for the high-quality and high-yield- ing production of honey pomelo.
文摘Biochemical mechanism of forming the red tide is discussed in this paper. The existence of a large number of nitrates and phosphates in the eutrophic water is the prerequisite of explosive increase of algae and the forming of red tide. Reduction of eutrophication is an important approach to preventing the red tide. The method of deep treatment of the waste water and its denitrification and dephosphorization are introduced, and a new opinion on the red tide formation and fundamental prevention is put forward.
文摘Advertising and sales promotion have significant impact on raising customer awareness. They are tools by which customers become acquainted with new and innovative products and services of the companies. Despite the importance of these tools in increasing sales, it is not easy to evaluate their effect on sales. One of the problems confronted by the marketing managers is the determination of a clear relationship between the effectiveness of advertising and sales promotion on profitability. In this article, considering the relationship between these tools and brand equity, we have attempted to determine the relationship between effectiveness of these two factors and profitability. Next, a system dynamics model for representing the effects of marketing communication tools on company profitability is offered. Finally, using the data from a corporation and the numeric values related to each of the elements in the model, an attempt has been made to determine a number representing the magnitude of the effect of advertising and sales promotion on the corporation＇s revenue and profitability and to draw the respective curves related to the effects of these two factors.
