宁夏春小麦光合性能的初步研究

Preliminary Study on Photosyn thetic Capacity of Spring Wheat in Ningxia

对宁夏不同时期种植的春小麦品种进行光合性能的研究,结果表明:不同品种的光合性能存在较大差异,尤其是目前生产上推广利用的育成品种,其光合速率及叶绿素含量明显高于地方品种,光合速率高值持续期及叶绿素含量缓降期也明显高于地方品种,光合速率与叶绿素含量间存在显著正相关,相关系数分别为第3叶0.86(p<0.01),旗叶0.705(p<0.05);叶绿素含量缓降期与光合速率高值持续期也呈正相关。

A study was made on the photosynthetic capacity of various varieties of spring wheat planted in Ningxia in different period. The results show that rather big differences in photosythetic capacity exist among different varieties. The photosythetic rate and chlorophyll content of the improved varieties currently extended and used in production are significantly higher than those of local varieties. The sustained period of high photosynthesis and slow reducing period of chlorophyll content are also much longer than those of local varieries. A significant positive correlation exists between photosynthetic rate and chlorophyll content and the correlation coefficients are 0.86(p<0.01) for the third leaf and 0.705(p<0.05) for the boot leaf. The slow reducing period of chlorophyll content and sustained pertiod of high photosynthesis are also positirely correlated to earch other.