Study On The Comprehensive Evaluation System Of Processing Tomatoes

Tomato is an herbaceous plant of solanceae solan lycopersion esculeutum mill.It is not only a vegetable,but also fruit.With the increasing needs of tomato,the problem of processing tomato was paid much attention.The fruits of "HuaMei87-5 , ShiHong206,ShiHong208" were used to study on the changes of lycopene,soluble solid, reductive sugar, firmness,ascorbic acid and total acid at the accelerate ripe stage,half ripe stage,mature stage,full ripe stage;and soft ripe stage.And comprehensively evaluated them by the way of analytic hierarchy process(AHP)and DTOPSIS. The result was following:1. From accelerate ripe stage to full ripe stage, the content of soluble solid, the content of reductive sugar and the content of ascorbic acid keep rising, and reach the top at the full ripe stage, while total acid and hardness were gradually reducing. The content of lycopene, the content of soluble solid, reductive sugar and the content of ascorbic acid began falling down at soft ripe stage. Total acid and firmness kept reducing, and reach the foot of the five stages.2.Calculate weight by the way of AHP. The weight of lycopene was 0.4553; the weight of soluble solid was 0.2512; the weight of reductive sugar was 0.1343; the weight of total acid was 0.0830; the weight of hardness was 0.0506; the weight of ascorbic acid was 0.0255. CR<0.1. From what mentioned above, the weight was distributed rationally.3.The order of Q: three varieties were in the front at full ripe stage. Soft ripe stage was the second, mature stage was the third, half ripe stage was the forth and accelerate ripe stage was the last. Therefore, the evaluate score of accelerate ripe stage was the highest and we made sure it was the best time to harvest.4.At the full ripe stage, Q order of Huamei 87-5 was the first; Q order of Shihong 206 was the second; Q order of Shihong 208 was the third. So Huamei 87-5 was better than Shihong 206 and 208.In a word, we can comprehensively evaluate processing tomatoes correctly by the way of AHP and DTOPSIS and make sure the weight according to different areas' conditions, product problems and market needs. It is easy to understand and calculate.