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在广东省高要市活道镇马尾松林地，于晴天就地选取马尾松针叶，每隔１ ｈ１ 次用快速称重法测定其从上午８ 时到下午５ 时的蒸腾强度；与此同时，测定立地光照强度、气温、叶面温度、相对湿度、风速、气压等小气候因子的日变化－ 研究表明：马尾松针叶蒸腾强度日变化符合正弦波动，与气压相关性不显著，与相对湿度呈极显著负相关，而与光照强度、风速、叶面温度、气温均呈极显著正相关
Masson pinewoods were selected from livewood town of Gaoyao City, Guangdong Province on sunny days to determine the transpiration intensity of the masson pine needles from 8 AM to 5 PM every 1 h with rapid weighing method. At the same time, The diurnal variations of microclimate factors such as light intensity, air temperature, foliar temperature, relative humidity, wind speed and air pressure were measured. The results showed that the diurnal variation of transpiration intensity of Pinus massoniana was in accordance with the sine wave and the correlation was not significant with the air pressure. But significant negative correlation with light intensity, wind speed, leaf temperature and air temperature