【摘要】 以2005~2007年早晚造种植的5个水稻品种为材料,研究不同水稻品种的物质生产特性。研究结果表明,不同时期不同水稻品种的物质生产特性表现有一定的相似性,抽穗至乳熟期是水稻产量形成的关键时;2005年晚稻新丰两优6、2007年早稻富瑶美3号的产量最高,可能是因其中后期(抽穗期-乳熟期)具有较高的叶面积指数、群体净同化率和群体生长率。为提高水稻产量,要适当延迟氮肥的施用时期和水稻的生育期,加强水稻中后期管理,提高水稻干物质积累,以提高籽粒产量。更多还原

【Abstract】 Five rice varieties were planted in early cropping and later cropping in Liuzhou City from 2005 to 2007,to study the biomass production of different rice varieties.The results showed that the biomass production of different rice varieties had some similarities at different stages,and the heading to milk stage was the key stage of yield formation.Moreover,the grain yield of the late rice Xinfeng Liangyou 6 in 2005 and the early rice Fuyaomei 3 in 2007 was the highest,respectively.These two rice varieties had higher leaf area index,net assimilation rate and growth rate of population,which resulted in high grain yield.Therefore,in order to increase the yield of rice,the application of nitrogen fertilizer and growth duration should be delayed,the management of rice should be strengthened at middle-later stage to increase the accumulation of dry matter and grain yield of rice.更多还原