摘要
采用逐步回归和通径分析的方法,对新台糖1号甘蔗旬茎重增长与11个气象因子之间的关系进行研究。结果表明:分蘖期影响茎重增长的主要气象因子是最低气温和最高气温,其中最低气温对茎重增长的直接效应为正,最高气温的直接效应为负;伸长期的主要气象因子为日照时数、降雨日数和平均风速,均为正效应,次要因子蒸发量的直接效应为负;成熟期的主要气象因子为最低气温和平均风速,均为正效应。并据此提出,在伸长期增加灌溉是甘蔗增产的关键措施。
Applying the methods of stepwise and path analysis, a study was made about the relationship between sugarcane ROC1 stem weight increase in a period of ten days and 11 meteorological factors in every ten days such as average air temperature, the quantum of precipitation, rainfall days, sunshine hours, the quantum of evaporation, relative humidity, average wind speed, maximum air temperature, minimum air temperature, average maximum air temperature and average minimum air temperature. The results showed that: (1) Maximum air temperature and minimum air temperature were the key meteorological factors for affecting sugarcane stem weight increase during the tillering stage. The direct effect of minimum air temperature on stem weight increase was positive, and the effect of maximum air temperature was negative. (2) During the elongation stage, the key factors were sunshine hours and rainfall days and average wind speed, and all of their direct effects were positive. The quantum of evaporation was subordination factor, and its effect was negative. (3) Minimum air temperature and average wind speed were the key factors during the autumn. Their effects were all positive. From this study, it could be recommended that increasing irrigation during elongation stage is the key measure for increasing sugarcane yield.
出处
《热带农业科学》
2005年第1期5-9,共5页
Chinese Journal of Tropical Agriculture
基金
中国热带农业科学院院长基金资助项目。
