【摘要】 1978—1988年,我们对甜高粱与粒用高粱的干物质积累、分配与产量形成进行了比较研究,结果表明:(1)两者干物质积累过程都可用 Logistic 模型描述,但甜高粱较粒用高粱干物质积累峰值高,后期积累速度快,单株生物量高。(2)甜高粱是具有穗和茎两个库的双库型作物,其营养生长与生殖生长并进时间长,几乎从拔节延续到成熟。甜高粱茎的干物质分配率一生均为正值,而粒用高粱曾出现过负值。(3)两者产量形成的特点不同,甜高粱的穗发育晚而速度较慢,茎增重时间长。(4)甜高粱茎秆的糖度是上、中部节较高,而各节糖含量是中、下部节较高。更多还原

【Abstract】 The accumulation and distribution of dry matter and yield formation of sweetsorghum and grain sorghum were studied comparatively in 1978—1988.The resultsindicated that:(1)Dry matter accumulation in both kinds of sorghums could be des-cribed by Logistic model,but the peak value of dry matter accumulation was higher,the rate of dry matter accumulation during the later growth periods was faster,andthe biomass per plant were larger in sweet sorghum than in grain sorghum.(2)Sweetsorghum is a crop with two sinks—panicles and stem.The accumulation of dry matterin the vegetative and reproductive organs proceed almost simultaneously at a similar ratefrom booting stage to maturity.The dry matter distribution rate(DMDR)to thestem of sweet sorghum maintained a positive value throughout its whole life,but,theDMDR to the stem of grain sorghum was sometimes negative.(3)The features of theyield formation of the two were different.The development of the panicle of sweetsorghum was later and slower,the time of dry matter accumulation in the stem of itwas longer than grain sorghum.(4)The saccharinity of the stem was higher in theupper and middle internodes,but the sugar content was higher in the lower and mid-dle internodes in sweet sorghum.更多还原