两种观赏竹夏季空气负离子动态变化特征

Dynamic Variation Characteristics of Negative Air Ions in 2 Ornamental Bamboos in Summer

为了研究观赏竹的空气负离子浓度在夏季的变化趋势,及与环境因素的关系,选取了两种常用的园林造景观赏竹种为研究对象,采用折线图、回归分析等方法分析2种观赏竹的夏季空气负离子浓度变化特征,及与温度、湿度和光照强度的相关性。研究结果表明,(1) 2种个观赏竹种佛肚竹和黄金间碧竹在一天中均有最高值和最低值,两个竹种的空气负离子浓度变化差异明显,佛肚竹的最高峰在早上10∶00,浓度达到1789个/cm^3,而黄金间碧竹的最高峰出现在下午16∶00,峰值浓度为954. 5个/cm^3,佛肚竹的峰值浓度近于黄金间碧竹峰值浓度的2倍。(2)佛肚竹的空气负离子浓度日变化曲线趋于'W型',黄金间碧竹的空气负离子浓度日变化曲线趋于'V型'。(3)佛肚竹的负离子浓度日变化曲线变幅较大,最高峰与最低值相差较大,黄金间碧竹的负离子浓度日变化较稳定,最高峰与低谷相差较小。(4) 2个竹种的空气负离子浓度均与空气温度呈负相关关系,随着温度的上升空气负离子浓度逐渐变小。(5) 2个竹种的空气负离子浓度与湿度呈正相关关系,即随着空气湿度的增加空气负离子浓度增大,随着太阳强度增大,空气中湿度减弱,空气负离子浓度也逐渐下降。(6)佛肚竹的空气负离子浓度与光照强度呈正相关关系,黄金间碧竹的空气负离子浓度与光照强度呈负相关关系。从上述研究分析中可发现,佛肚竹的空气负离子浓度在夏季优于黄金间碧竹,在园林景观绿化要求高负离子浓度时可优先选择该竹种,以期为市绿地建设和改善空气质量提供参考依据。

In order to study the changing trend of air negative ion concentration in bamboo and the relationship with environmental factors,two kinds of commonly used ornamental bamboo species were selected as the research object.using the line graph,regression analysis of two ornamental summer air negative ion concentration change characteristics of bamboo,and its correlation with temperature,humidity and light intensity.The results showed that:(1)There were the highest and lowest values of the two groups,and the highest concentration of air negative ions in the two bamboo species was different.the highest peak of B.ventricosa at 10:00 in the morning,the concentration reached 1789/cm^3,and the highest peak of B.vulgaris at 16:00 pm,the peak concentration of 954.5/cm^3,the peak concentration of the B.ventricosa near the edge of the concentration of B.vulgaris 2 times.(2)The diurnal variation curve of air negative ion concentration of B.ventricosa tends to be'W-type',and the diurnal variation curve of air negative ion concentration of B.vulgaris is becoming'V'.(3)The diurnal variation curve of the negative ion concentration of B.ventricosa was larger than that of the lowest value.The diurnal variation of the negative ion concentration of B.vulgaris was relatively stable,and the difference between the peak and the bottom was smaller.(4)The negative ion concentration of the two bamboo species was negatively correlated with the air temperature,and the concentration of negative ions increased gradually as the temperature increased.(5)The negative ion concentration of the two bamboo species is positively correlated with the humidity,that is,with the increase of air humidity,the negative ion concentration increases with the increase of the solar intensity,the air humidity decreases and the air negative ion concentration decreases.(6)There was a positive correlation between air negative ion concentration and light intensity,and there was a negative correlation between air negative ion concentration and light intensity.From the above analysis,it can be found that the concentration of negative ions in the bamboo is better than that in the middle of the summer,and the bamboo species can be given priority when the landscape is greening,so as to provide reference for the construction of green space and improve the air quality.