Leaf nitrogen — sodium ratio in sugarcane clones and its associations with other parameters at grand growth period
- 46 Downloads
Leaf N/Na ratio had a range of 3.64 in CP 44-101 to 6.09 in Co 6806 as per variety mean and their differences were significant. The wide variation of leaf N/Na ratio was between 2.54 in Co 1148 at 7 months to 7.86 in CoA 7601 at 4 months. High leaf N/Na ratio were observed in Co 6806, Co C 671, Co 7508, Co 7204, Co617, Co A 7601, Co 7201,Co 7717, Co 740, Co 853, Co 6304, while clones recorded low N/Naratio were CP 44–101, Co 62399, Co 1148, Co 975, Co 7704, H 50–7209, Co 997, Co 62101, Co 62175, Co J 64 and Co 775. Statistically significant decreas & of leaf N/Na ratio between stages were observed from 6.21 at 4 months to 3.42 at 7 months. The interactions-between clones x stages were also significant at 0.1 % level. The associations of leaf N/Na ratio were significant and positive with leaf N/P, N/K, N/Ca, N/Mg, N/S, N/C1, N/ Si ratios, sucrose % juice at 10 and 12 months, cane yield at 10 and 12 months, sugar yield at 8, 10 and 12 months, cane volume, cane height, cane thickness, cane weight, harvest index-sugar yield-8,10 and 12 months both on fresh weight and dry weight basis. There was a significant negative association between leaf N/Na ratio and leaf cations minus anions. However, leaf N/Na ratio had no effect on at any one stage with leaf cations/anions ratio, sheath N/P, N/K, N/Ca, N/Mg, N/S, N/C1, N/Na, N/Si, cations/anions ratio, cations minus anions, internodes numbers, stalk numbers, cane density, culm bulk density, harvest index-cane yield, harvest index-CCS %, harvest index-sucrose % juice-10 and 12 months both on dry weight and fresh weight basis.
KeywordsGrand growth period nitrogen-sodium ratio sugarcane
Unable to display preview. Download preview PDF.
- Barnes, A. C. (1974). The Sugarcane. Leonard Hill books, Bucks. pp 572Google Scholar
- Bishop, R. T. (1964). Stalk sodium; a useful guide in investigating problem of plant nutrition. Cong. South Afri. Sug. Tech. Assoc.38:126–133Google Scholar
- Bishop, R. T. (1965). Plant sodium a guide to improving the reliability of foliar diagnostic techniques. Proc. Int. Soc. Sugarcane Tech.12: 188–196Google Scholar
- Clements, H. F. (1980). Sugarcane crop logging and crop control. Principles and Practices.The University Press of Hawaii, Honolulu, pp 520Google Scholar
- Gupta, A. P. andPrasad, B. (1971). Studies on composition of cane juice. I. Effect of N manuring on various inorganic non-sugars in the juice of plant and ratoon crops. Proc. Joint Conv. Ind. Sug. Tech. Assoc.4: A 81–90Google Scholar
- Kumar, S., Kumar, D. andSinha, R. N. (1989). Change in yield attributes, juice quality and mineral nutrients in cane juice due to smut infection. Ind. Sug.39(4): 233–237Google Scholar
- Nasir, N. M., Qureshi, R. H., Aslam, M. andJavaid Akhtar. (2000). Screening of sugarcane lines selected through hydronic studies in naturally salt affected field. Pak. Sug. J.15 (4): 2–10Google Scholar
- Shukla, S. P. andKamalabad, M. B. R. (1990). The mineral composition of leaves and juice of sugarcane as affected by application of N, IAA and cycocel. Proc. Sug. Tech. Assoc.52: A 123–132Google Scholar
- Sithanantham, S., Srinivasan, T. R. andRao, T. K. G. (1976). Influence of foliar application of potassium fertilizer on chemical composition of sugarcane foliage Ind. Sug.25: 917–918Google Scholar
- Vogel, A. I. (1975). A text book of quantitative Inorganic Analysis. Longmann, London.Google Scholar