摘要
选用黑龙江省目前生产上典型高产水稻品种或新育成的超高产有望品系 11个 ,在超高产栽培条件下研究寒地水稻品种成熟期茎鞘干重变化过程的差异及其和结实率的关系。结果表明 ,(1)水稻成熟期茎鞘干重变化过程可分为 3个阶段 ,阶段 茎鞘干重升高 ,阶段 持续降低 ,阶段 趋于稳定 ;(2 )不同品种成熟期茎鞘干重变化过程不同。依据阶段 有无将供试品种分为两类 ,A类型具有阶段 、 和 ,B类型只有阶段 和 。A类型品种结实率较高。 (3)不同品种阶段 持续时间长短有差异 ,有的品种 5 d,有的品种 10 d,时间短的品种结实率较高。 (4)不同品种茎鞘阶段 的茎鞘干重降低速率不同。此阶段单位颖花每天从茎鞘获得物质的最大量高 。
Varietal difference in change process of dry culm weight during ripening period and their effects to percentage of ripened grains were studied using 11 rice varieties that were currently extended or recently developed in Heilongjiang Province.The results showed that (1) The change process of dry culm weight in the cold area fell into 3 phases.The dry culm weight increased in Phase 1,decreased in Phase 2,and remained stable in Phase 3.(2)There were differences in the change process of dry culm weight of the varieties.The varieties were divided into 2 patterns,that was,Pattern A had Phase 1,2 and 3, and Pattern B only had Phase 1 and 2.The varieties of Pattern A could get high percentage of ripened grains.(3)Some varieties were 5 days of Phase 1 duration,and the others were 10 days.The shorter duration of Phase 1 was beneficial to high percentage of ripened grains.(4)There was varietal difference in the decrease rate of dry culm weight in Phase 2.The higher the maximum amount of potential dry matter from the culm to panicle per spidelet a day was,the higher the percentage of ripened grains probably was.$$$$
出处
《东北农业大学学报》
CAS
CSCD
2001年第4期313-319,共7页
Journal of Northeast Agricultural University
关键词
寒地
水稻
品种
成熟期
茎鞘
干重变化
结实率
cold area
rice varidty
ripening period
dry culm weight
percentage of ripened grains
