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据报道,甘蔗叶斑可在可溶性硅含量低的土壤上发生.且这种叶斑在酸、冷、排水不良的土壤种植的蔗株上发现.在蔗叶上,它表现为小而细长的黄斑,渐渐由黄转红,然后变为褐色,最后随着叶片的老化变为暗灰褐色而坏死.同时这斑块逐渐扩大,坏死区也随之伸展.这种叶片,特别是在充足阳光下的叶片,会发生象镜子般的银斑.最后银斑转红,且较老叶提早死亡.有叶斑甘蔗之所以光合效率低,不仅是因其叶片数较少,而且还因许多叶片都长有叶斑.
It has been reported that sugarcane leaf spot can occur in soils with low soluble silicon content and this leaf spot is found on sugarcane plants planted in acid, cold and poorly drained soils, which show small and slender Of the macula, gradually from yellow to red, and then turned brown, and finally as the leaves become dark gray and brown necrosis, while the plaque gradually expanded, the necrosis area also will be followed by expansion of this leaf, especially in adequate The sun under the leaves, mirror-like silver spots will occur.Finally, the silver turn red, and the older leaves early death. The reason why photosynthetic cane photosynthetic efficiency is low, not only because of its fewer leaves, but also because of many Leaves have long leaf spots.