土壤pH值对甘蔗前期营养生长的影响

Effect of Soil pH on Nutritional Growth of Sugarcane in Early Stage

以玄武岩发育而成的强酸性黏土为试材,用碳酸钙、白云石粉、碱性肥料调节土壤pH值或代替普遍肥料进行施用,研究这些碱性物质对甘蔗株高、分蘖数的影响,以探寻合适甘蔗生长的土壤pH值,为甘蔗地土壤改良提供依据。结果表明,在强酸性土壤上施用碱性物质碳酸钙、白云石粉、碱性肥料对甘蔗分蘖没有显著影响,但可显著促进甘蔗株高增长;甘蔗酸害阈值为pH值6.0。

Using strong acid clay developed from basalt as material,calcium carbonate,dolomite powder and alkaline fertilizer were used to regulate soil pH value or replace general fertilizer.The effect of the alkaline substances on sugarcane plant height and tiller number were measured,in order to explore the suitable soil pH value for sugarcane growth and provide a basis for soil improvement in sugarcane fields.The results showed that the application of alkaline substances such as calcium carbonate,dolomite powder and alkaline fertilizer had no significant effect on the tillering of sugarcane that was planted on the strongly acidic soil,but significantly promoted the growth of sugarcane plant height;the acid damage threshold of sugarcane growth was pH 6.0.