雷州半岛甘蔗的营养状况

Nutrient Conditions of Sugarcane of Leizhou Peninsula

通过对雷州半岛蔗区甘蔗营养状况的普查 ,利用数理统计方法 ,分析了养分间、养分与经济性状间的相关关系。结果表明 :增N、提高土壤pH值可显著提高茎长 ,茎长的提高可促进单茎重、工业蔗产量、含糖量极显著提高。增K、Mg可显著提高有效茎 ,有效茎的提高可促进工业蔗产量显著提高 ,却导致锤度显著下降。偏施Mg会导致锤度极显著下降。因而采取的措施为增N、K ,合理配施镁含量低的石灰和P肥 ,以促进茎长、单茎重、有效茎的提高 ,从而提高产量 ;控施Mg肥 。

Through the nutrient general survey of sugarcane field in Leizhou Peninsula and utilizing the statistical analysis method of mathematics, the relevant relation is concluded among nutrients, between the nutrient and economic properties. On this basis, the results show: With increased N,and raised pH, the sugarcane’s stem can be lengthened, and the stem lengthened can increase the weight of a single stem, industrial sugarcane yield and the sugar content in a remarkable way. With K, Mg increased, effective stems can be increased remarkably, and the effective stems’ increase can promote the raise of sugarcane yield strikingly, but lead to the decline of sugar content. Singular increase of the application of Mg will lead to the decline of sugar content. Therefore measures should be taken to increase the application of N, K with rational lime and phosphate fertilizer to promote the stem length, the single stem weight, the raise of effective stems in order that sugarcane yield can be raised; while controlling the application of Mg, the purpose of raising sugar content can be attained.