Study on the Utility of Effective Tillers of Different Tiller Control Colony of Rice in Cold Region

The study was under the condition of Heilongjiang reclamation cold area,based on the system analysis of the panicle quantity types and panicle weight types individuals in different stages,which the colony tillers were controlled.The results showed that panicle quantity types,which was 80% of the plan,main used the 0、0-2、0-3、0-4、0-3-1 tillers.When it was 100% of the plan,it main used 0、0-2、0-3、0-4、0-5、0-2-1 tillers.The panicle weight types both use 0、0-3、0-4、0-5 tillers,when it was 80% or 100% of the plan.No matter panicle quantity types or panicle weight types,compared with CK,the two tiller control treatments both could improve seed-setting rate of each tiller level.