Studies on the soil-plant-water relations of 'drought-susceptible' and 'drought-resistant' sugar cane varieties
| MSI99P0012 | |
| Mongelard, C. | |
| University of London, London, GB | |
| Studies on the soil-plant-water relations of 'drought-susceptible' and 'drought-resistant' sugar cane varieties | |
| Thesis, Ph.D. | |
| Thesis | |
| 1968 | |
| 117 p.: 29 figs.,4 pl.,4 diagrams | |
| En | |
| En | |
| Some aspects of the soil-plant-water relations of 'drought-susceptible' and 'drought-resistant' sugar cane varieties are described. Various techniques were used for measuring the leaf water status (_ leaf) and the soil water status (_ soil) and attempts were made to relate values of _ leaf to those of _ soil. Estimations of _ leaf revealed no significant differences between methods when the leaves were subjected to the same treatment. The advantages and disadvantages of the techniques are explained. A greater rate of water loss in the drought-resistant variety M147/44 than in the drought-susceptible variety Ebène 1/37 when subjected to comparable heat treatment was taken to be an indication of drought resistivity and the differential effects of solute potentials on growth are discussed. Investigations carried out both in the greenhouse and in the field to study the effects of increased _ soil on the early growth rate of different varieties showed that maximum growth occurred when soil humidity was near field capacity. It has also been established that an increase in _ soil measured at a fixed depth had a more deleterious effect on growth rate of drought-susceptible varieties. These different responses were mainly attributed to difference in root system development which resulted, in drought-resistant varieties, in a much lower leaf area, shoot-root ratio; and because of a better root distribution in the deeper soil layers, in a lower _ soil at the soil-root interfaces. The differential tolerance of drought-resistant and drought-susceptible varieties to the herbicide Sinbar is shown to be governed by differences in growth pattern of the plant root systems. The advantage of using this chemical to classify cane varieties into the two respective groups, through an evaluation of the degree of leaf chlorosis following its application, is emphasized. | |
| SUGARCANE SOIL WATER RELATIONS PLANT WATER RELATIONS DROUGHT RESISTANCE VARIETIES PHYSIOLOGY ENVIRONMENTAL FACTORS | |
| MAURITIUS | |
| Sugarcane: Physiology | |
| Plant water relations | |
| 633.61:581.5 | |
| 1991-10-03 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| 1 | |
| BOT |