寒地水稻不同控蘖群体有效分蘖利用的研究

在黑龙江省垦区寒地条件下,对穗数型品种和穗重型品种在不同时期控蘖构成的群体进行了单株的系统分析.结果表明:穗数型品种达计划穗数80%时控蘖主要利用的是0、0-2、0-3、0-4、0-3-1蘖位的分蘖,达100%时控蘖主要利用的是0、0-2、0-3、0-4、0-5、0-2-1蘖位的分蘖;穗重型品种达计划穗数80%及100%时控蘖主要利用的都是0、0-3、0-4、0-5蘖位的分蘖.无论是穗数型品种还是穗重型品种,与CK相比两个控蘖处理都能提高各级蘖的结实率.

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

The study was under the condition of H eilongjiang 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.