割手密抗旱生理研究

Studies of Physiological Properties about Drought Resistance on Saccharum spontaneum L.

研究了割手密及其亲缘植物的切叶干比、叶中肋干比、切叶自然失水速度、自由水与束缚水含量比例和伤流量等抗旱生理指标。试验结果差异显著,足以表明割手密的抗旱能力与其近缘植物比较是更加优秀。以上述结果结合割手密植株的形态结构,评价了它在今后甘蔗品种改良中的利用价值。

The drought resistance physiological criteria,Saccharum spontaneum L. and its rlose related plants,such as matter amount of dry leaves;dry mid-rib in equal area;water-lose rate of cut leaves;ratio of free-water to bound- water in leaves and bleeding rate of wounded roots was studied.Results indicated that,compaving with its close related plants,the drought resi- stance of S.spontaneum L.was much excellent.Combine with the special morphological struture of S.spontaneum L.,the application value in cane improvement,from now on,was evaluated.