Photosynthesis and respiration of managed C3 turfgrass fields under various light conditions
Photosynthesis and respiration of managed C3 turfgrass fields under various light conditions
复制标题
不同光照条件下管理的C3草坪田的光合作用和呼吸作用
DOI：
10.2480/agrmet.66.3.2
复制
发表时间：
2010
影响因子：
1.3
通讯作者：
T. Matsubara
中科院分区：
文献类型：
--
作者：
Y. Kosugi;K. Osaka;Masayuki Itoh;S. Takanashi;T. Matsubara
采用密闭动态箱法，从春季到秋季对不同光照水平（100、60、49、20%）下管理的C3草坪（肯塔基州早熟禾，Poapratensis）农田生态系统CO2净交换进行了测定。净生态系统CO2交换原位测量使用“透明”室，和总生态系统呼吸速率测量使用“黑暗”室。阴影区的呼吸速率和生物量均较小。土壤温度归一化的生态系统呼吸在夏季下降，与植物生物量的季节变化相一致。在不同光照条件下，控制C3草坪草生态系统呼吸的主要因素是生物量及其季节变化，而不是温度。在每个测量时间，通过将呼吸速率与净生态系统交换相加来计算总光合作用的光曲线，在小区之间进行比较。春季各样地的总光合速率对光照的响应无明显差异，夏季除最暗样地外，最适光照下的最大光合速率均呈下降趋势。
Net ecosystem CO2 exchange from managed C3 turfgrass (Kentucky bluegrass, Poa pratensis) fields under various light conditions (irradiance level of 100, 60, 49, 20%) was measured with the closed dynamic chamber method from spring to fall. Net ecosystem CO2 exchange was measured in situ using a ‘clear’ chamber, and total ecosystem respiration rate was measured using a ‘dark’ chamber. Both respiration rate and the amount of biomass were smaller in the shaded plots. Ecosystem respiration normalized with respect to soil temperature decreased in summer, coinciding with the seasonal change in plant biomass. The amount and seasonal change of biomass, not temperature, mainly governed the ecosystem respiration of the C3 turfgrass fields under various light conditions. The light curve of gross photosynthesis, which was calculated by adding the respiration rate to net ecosystem exchange at each measurement time, was compared between plots. There were no obvious differences between plots in the response of gross photosynthesis to light in spring, and a decline of the maximum photosynthesis at an optimal irradiance was observed in summer, except in the darkest plot.
影响因子：
11.6
作者：
Kato, Tomomichi;Tang, Yanhong
通讯作者：
Tang, Yanhong
管理的 C3 草坪草田树中呼吸二氧化碳通量的分配。
影响因子：
1.3
作者：
Kosugi Y.;Itoh M.;Matsubara T;Takanashi S;Osaka K.Mizota Y;Dannoura M.;Shimamura T.;Makita N.
通讯作者：
Makita N.