The Growth Trends And Physiological Research Of Sugarcane Colony Of High Yield With Different Structures

T22 as the material, the four planting structures( treatment A: narrow row and wide individual ,row spacing ,1.0m ; treatment B: wide row and narrow individual ,row spacing,1.25m; treatment D: wide and narrow row-wide individual, row spacing ,1.5m; treatment C: wide and narrow row-narrow individual ,row spacing 2.0m .) and the four structure colonies' growing trends, the physiological characters, the yield and quality were studied in the research ,the results were as follows:Colonies' growing trends characters: the highest germinating rate was treatment C, 71.9%; the lowest was treatment D, 68.3%; the highest tiller rate was treatment A, 55.5%, the lowest was treatment C, 41.8%; the fastest gVowing rate in the whole bearing period wastreatment C, the next was in treatment B, the lowest was treatment A; The highest LAI was treatment A, the next was treatment B, the lowest was treatment D. The most of efficient stems were treatment A, 6155 stems, the fewest was treatment C, 5265 ones, the difference between treatment A and treatment C come up to the very obvious level of 1%, the difference between the others was not obvious.Physiological characters: chlorophyll content, net photosynthesis rate, transpiration rate, NRA activity and acid invertase activity ,etc, the results of all treatments had the same characters: high in the tiller period, the highest in elongating period, low in technical period, but the difference between them was not obvious. The content of solubility sugar in the leaves was gradually increasing from the elongating period to the technical period, reaching to the highest level in technical period; The changes of dry materials of daily accumulation from the tiller period to the technical period was the highest in the elongating period, the next was in the technical period.The yield and quality of sugarcane: the highest yield of stems per 666.7m2 was treatment D, 9169.87kg. The lowest was treatment C, 7427,12kg. The difference between treatment C and D was obviously different, reaching to 5%. The highest content of sugar was treatment B, 15.46%; the lowest was treatment D, 15.19%. Glucose of all thetreatments was low, less than 0.1%. The gravity purity of cane juice was A>C>B>D, over 86%.The highest sucrose per 666.7m2 was treatment D, 1392.75kg; the lowest was treatment C, 1138.58kg. The difference between treatment D and C was obvious, up to 5%. The content of sucrose was over 15.00t/ha.