基于NIR和GIS的甘蔗含糖量与种植条件关系研究

为监测较大区域内甘蔗产量及含糖量的时间、空间变化情况,了解地区、环境及土壤成分与甘蔗含糖量的关系,为甘蔗栽培提供指导,以日本琉球群岛南大东岛甘蔗栽培区为对象,用NIR方法测定甘蔗含糖量及其他成分含量,采用GIS技术建立地块位置、甘蔗产量、含糖量及P、K含量和土壤K含量数据库。在此基础上,建立3个栽培年度甘蔗含糖量、单产与甘蔗汁P、K含量的空间分布图,发现甘蔗含糖量与降水量及种植区水环境密切相关。对甘蔗含糖量及P、K含量和土壤K含量的相关分析表明,甘蔗含糖量与甘蔗汁P含量呈正相关,而与甘蔗汁和土壤K含量均呈负相关。

Analysis on correlation between sugar content and planting conditions of sugarcane using NIR and GIS

In order to provide the guidline for sugarcane cultivation, the temporal and special variations in sugarcane yield and sugar content, the relationship between planting area environment, soil compositions and sugarcane quality were analyzed. In the study, the sugar content of sugarcane was measured by using Near Infrared Spectrometer (NIR), and a space database containing information of field locations, sugarcane yield, sugar content, P and K contents in sugar juice and soil K content was established with Geographic Information System (GIS). Based on this, distribution maps of yield, contents of sugar, P and K of sugarcane in three cultivation annuals of 2000~2003 were achieved. It is found that sugar content of sugarcane is mainly affected by rainfall and water environment of plantation. The analysis on relationships of sugar content with P and K contents in sugarcane juice and soil K content shows that sugar content is positively correlated with P content of sugarcane juice, but negatively correlated with K content of sugarcane juice and soil.