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用广西有代表性的石灰土、冲积土、四纪赤红壤和沙页岩赤红壤进行甘蔗耐氯浓度试验。这四种土壤上的氯水平达3200mg/kg,甘蔗苗期即开始出现外观中毒症状,植株矮小,叶片卷曲、僵硬,叶尖枯黄致死,并沿叶缘向叶基延伸、尤以四纪赤红壤和沙页岩赤红壤为重。随着植株长大,耐氯能力增强。甘蔗在石灰土、冲积土、四纪赤红壤上施氯的临界值为800～1600mg/kg,沙页岩赤红壤为400～800mg/kg。在临界以下,对蔗茎产量影响不大。但是,赤红壤氯离子浓度在100mg/kg以上,石灰土在200mg/kg以上,冲积土在400mg/kg以上,甘蔗糖分随氯离子浓度的提高而呈下降趋势。
In this paper, sugarcane chloride tolerance test was carried out on the representative limestone, alluvial soil, latosolic red soil and sandy shale red soil in Guangxi. Chlorine levels in these four soils reached 3200 mg / kg. Sugarcane indica symptoms began to emerge at the seedling stage, with short plants, curled leaves, stiff leaves, and withered yellow leaves, extending along leaf margins to the leaf base, Red soil and shale red soil as heavy. As plants grow, chlorine tolerance increases. The critical value of sugarcane application in limestone, alluvial soil and red soil of Quaternary is 800 ~ 1600mg / kg, and shale red soil is 400 ~ 800mg / kg. Below the threshold, little effect on cane yield. However, the concentration of chloride ion in red soil was above 100mg / kg, lime soil above 200mg / kg and alluvial soil above 400mg / kg. The sugar content of cane sugar showed a decreasing trend with the increase of chloride ion concentration.