Evaluation and Selection of Watermelon Transplanting Period in Warm Shed Based on Analytic Hierarchy Process

Abstract

In order to select the best and suitable transplanting period of watermelon in Changle warm shed, the meteorological observation and innovative planting experiments of 10 warm shed waterme-lons were comprehensively evaluated by using analytic hierarchy process (AHP). With temperature, sugar content, taste, yield, number of growing days and price as six indexes, 10 evaluation factors of 3 grades were determined for watermelon transplanting period evaluation, and the comprehensive evaluation model was established. According to the evaluation results, the ten phases of watermelon transplanting were divided into 5 grades. Grade I had the third transplanting period, which was the best transplanting period. The sugar content is high, the taste is very good, and the output is high and the price is high. The second grade has the fifth transplanting period, the sixth transplanting period and the seventh transplanting period, which is the suitable transplanting period. The sugar content, yield and price are slightly lower than the third phase. Grade III includes the first transplanting period, the second transplanting period, the fourth transplanting period and the eighth transplanting period, which is the most suitable transplanting period. The sugar content is generally not high, the taste is general, and the price is not high. Grade IV has the ninth transplanting period, which is less suitable for transplanting. Grade V has the tenth transplanting period, which is not suitable for transplanting. Comprehensive analysis showed that the best transplanting time of watermelon was late December, and the appropriate transplanting time was from December 6 to January 15.