Study on Effect of Straw and Plastic Film Dual Mulch in Dry cultivation of Rice Planting

The effect of straw and plastic film dual mulch in dry cultivation of rice planting was studied. Results showed that by using straw and plastic film dual mulch in dry cultivation of rice planting, both of the range of temperature difference and the loss of water in dry cultivated field of rice were decreased, the soil structure was improved, the soil nutrient contents were increased, the ineffective tillers of rice plant were decreased, the growth and development stage were advanced, the filling stage was extended, the grain per ear and 1 000 grain weight were raised, the grain yield of rice increased obviously. The increasing in grain yield was about 10.3%, 8.9%, 23.2% respectively as compared with the plastic film mulch, the straw mulch and the unmulched cultivatiom.