气象因素对甘蔗含糖份的影响

本文对闽中、闽南的5个地点16年气象资料与甘蔗含糖份之间的关系进行了统计分析。根据多元决定系数 R~2=0.4819,表明日照、温度、平均日较差、雨量等4个气象因子对糖份的影响占48.19%,其它因素如栽培措施,品种,病虫害,土壤,榨季长短,原料蔗的砍收、堆积、运输等共占51.81%。根据相关、通径分析结果,甘蔗含糖份与日照、温度、平均气温日较差、雨量的相关都达极显著水平。除雨量为负值外,其余皆为正值;其中日照、温度、平均日较差的直接影响也为正值,雨量的直接影响为负值。多元回归分析也表明,对糖份积累起主要作用的气象因子分别是日照、温度、平均日较差。对5个地点分别进行的统计分析结果与综合分析结果基本一致。

THE EFFECT OF METEOROLOGICAL FACTORS TO SUGAR CONTENT IN SUGARCANE

It may be now ascertained that sugar content in sugarcane descending during 1981-82 and 1982-83 crop season respectively.In this paper,statis- tical analysis was conducted for the relation between stcrose content in sugarcane and 16-year meteorological date(September to March of next year, respectively)in five sites of mid and southern Fujian. According to multiple determination coeficicnt R~2=0.4819,it indicated that four meteorological factors(sunlight,temperature,average day-night temperature diffcrential and rainfall)effecting sucrose content made up 48.19 per cent.Other factors,however,such as cultural practices,varietly, discasc,insects,soil,fetilizer and harvest etc,only madc up 51.81 per cent.it showed the major factor effecting suerose content is the meteorolo- gical factor.Accorrding to the results of correlation and path analysis, the most significant correIatiin level existed between sucrose content and meteorological factors. By using multiple regression analysis,it showed that among the four- meteorological factors,the sunlight is major,then temperature,average day- night temperature differential,rainfall to effect sucrose content in sugar- cane,respectively.But the four meteorological factors have influenced upon each other also.The results of the five different sites are same as the whole.