Effects of Planting Methods on Lodging Resistance of Rice in Cold Area
In order to explore the effects of different planting methods on the lodging resistance of rice in cold area,the lodging resistance characteristics of two rice varieties,'Longjing 21'and'Longdao 18',were studied under water direct seeding method,dry direct seeding method,and transplanting method.The planting methods influenced the lodging resistance characteristics of rice significantly in the cold region,but the performances of the two varieties were inconsistent.The lodging index of N1,N2,N3,and N4 internodes of'Longjing 21'was transplanting＞water direct seeding＞dry direct seeding.The single stem thrust resistance of N1,N2,N3,and N4 internodes of'Longjing 21'was dry direct seeding＞transplanting＞water direct seeding.The lodging index of N1,N3,and N4 internodes of'Longdao 18'was transplanting＞dry direct seeding＞water direct seeding,whereas the lodging index of N2 internode was dry direct seeding＞transplanting＞water direct seeding.The single stem thrust resistance of N1,N2,N3,and N4 internodes of'Longdao 18'was water direct seeding＞transplanting＞dry direct seeding.Correlation analysis revealed that the plant height,the gravity center height,and the length of N1 and N2 internodes should be reduced appropriately to increase rice lodging resistance in cold areas.The large panicle population structure should not be selected.These results suggested that the selection of suitable varieties combined with the establishing of numerous and small panicle population structure could lead to higher yield and better lodging resistance of direct seeding rice in cold area.
万方数据
维普
