论文部分内容阅读
对栾树-茶(Koelreuteria paniculata-Camellia sinensis)、香樟-茶(Cinnamomum camphora-Camellia sinensis)和枫香-茶(Liquidambar formosana-Camellia sinensis)3种林-茶复合林分中环境因子的日变化及茶〔Camellia sinensis(L.)O.Ktze.〕的光合特征参数日变化和相关性进行了分析研究。结果显示,在3种林-茶复合林分中,光合有效辐射强度和气温的日变化呈单峰曲线,均在12:00达到最高值;空气相对湿度和大气CO2浓度呈先降后升的日变化趋势,分别在10:00和14:00达到最低值;各环境因子在全天不同时刻均有极显著差异(P<0.01)。3种林-茶复合林分中茶的净光合速率日变化均表现为不对称的双峰型曲线,峰值分别出现在10:00和14:00,其中枫香-茶复合林分中茶的净光合速率日均值最高(0.80μmol.m-2.s-1);茶的气孔导度与蒸腾速率均在每日的早、晚较低,并在10:00达到最高;胞间CO2浓度日变化整体呈“W”型曲线,每日的早、晚较高,在10:00最低,其中栾树-茶复合林分中茶的胞间CO2浓度的日均值最高;茶的净光合速率和蒸腾速率日均值在3种林-茶复合林分间有极显著差异(P<0.01),气孔导度和胞间CO2浓度日均值差异不显著。除气温与茶的净光合速率,以及光合有效辐射强度与茶的胞间CO2浓度、气温和空气相对湿度间相关性不显著外,其余环境因子与茶的净光合速率以及两两指标之间的相关性均达显著或极显著水平。综合分析结果表明,枫香-茶复合林分可改善茶的生长环境,促进茶生长,适合在安徽芜湖推广种植。
The diurnal changes of environmental factors in Koelreuteria paniculata - Camellia sinensis, Cinnamomum camphora - Camellia sinensis and Liquidambar formosana - Camellia sinensis were studied. The diurnal variation and correlation of photosynthetic parameters of tea [Camellia sinensis (L.) O.Ktze.] Were studied. The results showed that the diurnal variation of photosynthetically active radiation intensity and air temperature presented a single peak curve among the three kinds of forest-tea composite stands, reaching the highest value at 12:00. The air relative humidity and atmospheric CO2 concentration first and then increased Diurnal variation trend reached the lowest value at 10:00 and 14:00, respectively; all environmental factors had extremely significant difference at different times of the day (P <0.01). The diurnal changes of net photosynthetic rate of three kinds of tea plantation-tea composite forest showed asymmetric bimodal curves, the peaks appeared at 10:00 and 14:00, respectively, of which Liquidambar formosana-tea compound Net photosynthetic rate was the highest (0.80μmol.m-2.s-1). Stomatal conductance and transpiration rate of tea were lower at morning and evening, and reached the highest at 10:00. The intercellular CO2 concentration The diurnal variation showed a “W” curve, with a higher daily morning and evening and the lowest at 10:00. Among them, the daily mean of intercellular CO2 concentration in the Koelreuteria paniculata plantation was the highest. The net photosynthesis of tea The average daily values of rate and transpiration rate were significantly different among the three kinds of forest-tea plantation (P <0.01), while the average values of stomatal conductance and intercellular CO2 concentration were not significantly different. In addition to the air temperature and the net photosynthetic rate of tea, as well as photosynthetically active radiation intensity and tea intercellular CO2 concentration, air temperature and air relative humidity was not significantly correlated, the other environmental factors and tea net photosynthetic rate and between two indicators Correlations reached significant or very significant levels. Comprehensive analysis showed that Liquidambar formosana-tea composite forest can improve the growth environment of tea and promote the growth of tea, which is suitable for popularization in Wuhu, Anhui Province.