Study On Innovation Diffusion And Influencing Factors Of Rice Varieties In Liaoning Province

China is a major producer and consumer of rice in the world.As the main rice planting area in China,the rice yield of Liaoning province is not only important to guarantee the food security of our country,but also important to stabilize its' own agricultural economic development.In recent years,more and more rice varieties have been authorized and planted in Liaoning province,but fewer rice varieties can be widely promoted in large planting areas.Therefore,studying the main factors affecting the spread of rice varieties with scientific methods is of great significance to the rice industry of Liaoning province.The paper first analyzed the process of innovation and diffusion of rice varieties in Liaoning province and the results showed that the chalky rice rate and the chalkiness degree of rice appearance quality both declined a bit.In the aspect of rice taste,the amount of amylose declined,the adhesive strength improved.In the aspect of nutrition quality,the amount of protein improved as well.The brown rice rate and the milled rice rate of rice processing quality declined,the integral polished rice rate changed very few.Then,this paper analyzed the trend of annual planting area and cumulative planting area of 17 rice varieties that have been planted for over 8 years from 2007 to 2016 in Liaoning province.The research turned out that with the promotion time changing,the rice annual planting area and the cumulative planting area both showed in multiple distribution types.Based on the analysis above,the Logistic model and regression model were built to fit the diffusion process and calculate the relative parameters of 16 rice varieties which were conformed to normal distribution among 17 rice varieties.Finally,the diffusion speed was respectively analyzed with crop growth period,plant height,disease resistance and crop yield.The cumulative planting area was respectively analyzed with crop growth period,plant height,disease resistance and crop yield as well.The results showed that the variety characteristics were closely related to these parameters,among which the crop growth period had maximum positive influence on the diffusion speed of rice varieties.The maximum promotion area of varieties was significantly correlated to the disease resistance and crop yield.Yet compared with disease resistance,crop yield had a greater influence on it.