甘蔗耐盐力与植蔗盐分指标的探讨

An Approach to Salt Tolerance of Sugarcane and the Salinity Level Acceptable for Sugarcane Production

虽然调查结果表明,在土壤含盐量达1.6%时仍有蔗株生存,但植蔗的盐分指标比这一含量低得多。当盐分超过0.6%时,甘蔗萌发和蔗苗生长将受到严重的影响。要获得经济效果,植蔗土壤在甘蔗大生长期盐分含量须基本上保持在0.25%以下。在我国东南沿海地区,在春季可溶性盐含量0.6%以下的咸田,一般是适宜植蔗的。有些在春季含盐量达0.9%左右,但排水良好的咸田仍有可能获得经济合算的产量。

Although some stools survived in the soil with salt concentration reach- ing 1.6 percent according to the survey,the salinity level acceptable for sugarcane production is much lower.Sugarcane shows severe retardation in germination and early growth at salt concentration in excess of 0.6 percent when compared to lower concentration.In order to gain financial returns from sugarcane production,the salt content of the soil under sugarcane should be mostly below 0.25 parcent during the boom stage of growth.By and large,in the east and south coastal area of China,saline soils containing 0.6 percent of soluble salts in spring are suitable for sugarcane production. In some cases,economic yields my be obtained in well-drainaged saline soils with salt concentration around 0.9 percent in spring.