Effect of Lifengling and Isolane on Lodging Resistance of Direct Seeding Rice

The objective of this experiment was to study the influence of Lifengling and Isolane sprayed separately or in mixture on lodging resistance of direct seeding rice.The rice variety of Y liangyou 1 was used as testing material.The results showed that spray of Lifengling and/or Isolane lengthened the distance of the second internode,but reduced that of the third and the fourth internode below ear.In addition,it could also increase the stalk diameter and wall thickness,especially the internode between the third and the fourth node.Therefore,the breaking resistance and the lodging resistance of rice were strengthened and the lodging index of rice was reduced significantly(P0.01).The application of these regulators increased the plant height,leaf width,and the angular separation between leaves and stalk.At the same time,the application of these regulators reduced the length of flag,the second and the third leaf.Spray of these regulators improved the plant morphology and increased the ripening rate,single ear yield,and rice yield.Both the theoretical and the actual yield increased significantly(P0.01) owing to spray of these regulators.Spray of Lifengling brought the best outcome followed by combination of Lifengling and Isolane,and then Isolane.