| Based on the gray system theory and the data of vegetable production in Guangxi from 2008 to 2014, this paper established a gray forecasting model GM (1,1) of vegetable production in Guangxi province and carried out residual test, the correlation degree test and the posterior error test respectively. The test of model accuracy was confirmed based on the data of vegetable production in Guangxi from 2015 to 2016. The test results showed that the model was available. According to the prediction results of this model, the output of vegetables in Guangxi from 2017 to 2019 were 30 625 800 tons, 32 252 000 tons, 33 964 400 tons respectively. The yield of vegetable was positively correlated to planting area, consumption and financial expenditure. Based on the results, relevant policy suggestions of vegetable cultivation were proposed. |
