中文摘要：

2007~2008年以直立穗型品种沈农265、沈农6014和弯曲穗型品种铁粳4、辽盐16为试材进行田间试验,研究了不同穗型水稻南北和东西行向对物质生产和产量的影响,用＂感光胶片法＂分析了不同穗型群体受光量的差异。结果表明：不同穗型行向间物质生产与分配、产量及其构成因素都没有显著差异,证明无论是直立穗型还是弯曲穗型,行向与产量都没有直接关系;结实中期直立穗型群体距地面20,40,60,80cm高度叶片受光量平均值分别比弯曲穗型相应高度高10.36%、12.88%、27.11%和10.79%,直立穗型的特点是生物产量提高而经济系数并无明显降低,每穗粒数和结实率同步提高,因此尽管穗数和千粒重较低,产量仍然高于弯曲穗型,证明群体中下部光照环境改善是直立穗型产量潜力高的主要原因。

英文摘要：

The rice varieties Shennong265 and Shennong6014 with erect panicle type and Tiejing4, Liaoyanl6 with curve panicle type were used as materials for field experiment to study the effects of south-north row direction and east-west row direction on matter production and yield from 2007 to 2008. The quantities of population light interception in rice with different panicle types were analyzed by sensitive film method. The results showed that there was no significant difference in matter production and distribution, yield and yield component in different row direction in rice with different panicle type. It suggested there were no direct relationship between row direction and yield in rice no matter with erect panicle types or curve panicle type. The average values of quantity of population light interception in rice with erect panicle type were higher than that with curve panicle type in seed-setting middle stage, which increased 10.36%, 12.88%, 27.11%, 10.79% above ground 20era, 40cm, 60em, 80era, respectively. The features of rice varieties with erect panicle type were that biomass improved and economic coefficient didn＇t decrease significantly, and number of grains per panicle and seed setting rate synchronized to improve. Therefore yield was still higher than that with curve panicle type although the number of panicle and thousand grains weight were low. It was suggested that the main reason why yield potential of rice with erect panicle type were higher than that with curve panicle type was light environment in middle-lower part of population were improved. In addition, the relationship between panicle type and light energy utilization of population were discussed.