Leaf blade potassium-chloride ratio at grand growth period in sugarcane and its associations with nutrients ratios, yield components, sucrose and yield of cane and sugar.

摘要

Leaf blade potassium-chloride ratio (K/Cl ratio) was determined to assess its associations with other nutrients ratios, growth factors, yield components, sucrose% juice, cane and sugar yield. Leaf blade K/Cl ratio between clones, between stages and their interactions were observed significantly at 0.1% level. Leaf blade K/Cl ratio ranged from 2.84 in Co 678 to 5.90 in CoC 671 with the mean of 3.71. Clones Co 678, Co 853, Co 740, Co 617, Co 62399, Co 419, B 37172, and Co 975 recorded low K/Cl ratio in leaf blade while high leaf blade K/Cl ratio was observed in CoC 671, Co 7712, Co 62174, Co 775, Co 7304, Co 7704, CoA 7601 and CoJ 64. Leaf blade K/Cl ratio increased with age of the crop from 2.86 at 4 months to 3.39 at 5 months; 4.06 at 6 months to 4.56 at 7 months. Significant positive correlation of leaf blade K/Cl ratio was observed with leaf blade K/Ca ratio, leaf blade K/Mg ratio, leaf blade K/S ratio, leaf sheath K/S ratio, leaf blade cations/anions ratio, leaf cations-anions, leaf sheath cations/anions ratio, sucrose% juice, CCS%, harvest index-sucrose% juice, harvest index-sugar yield, harvest index CCS% at 10 and 12 months. The association of leaf blade K/Cl ratio was significant and negative with leaf sheath K/P ratio, leaf sheath K/Si ratio, number of tillers. However, leaf blade K/Cl ratio had no significant associations with on leaf blade K/N ratio, leaf blade K/P ratio, leaf blade K/Na ratio, leaf blade K/Si ratio, leaf sheath K/N ratio, leaf sheath K/Ca ratio, leaf sheath K/Mg ratio, leaf sheath K/Cl ratio, leaf sheath K/Na ratio, cane volume, cane density, cane height, cane thickness, cane weight, culm basic density, internodes numbers, internodes length, internodes weight, internodes volume germination%, stalk numbers, cane yield at 10 and 12 months and with harvest index cane yield at 10 and 12 months.