4种结缕草光合特性及叶绿素含量的比较研究

以结缕草属4个不同种为试验材料,采用叶绿素测定仪以及光合测定仪,测定4种结缕草光合特征参数以及叶绿素含量。结果表明:(1)4种结缕草叶绿素含量由大到小依次为:日本结缕草,中华结缕草,沟叶结缕草,细叶结缕草;(2)日本结缕草和沟叶结缕草的光补偿点(LCP)为40μmol/(m2.s),接近于自然光照条件下阳性植物的光补偿点30μmol/(m2.s);(3)中华结缕草和细叶结缕草的LCP较高,为80μmol/(m2.s),光饱和点(LSP)都平均为1200μmol/(m2.s);(4)4种结缕草的表观量子效率(AQY)与自然光照条件下植物的AQY(0.03~0.06 mol/mol)一致,但是中华结缕草却显著高于其他3种,因此,可初步推断结缕草为阳性、且耐荫性较强的草坪草,并且中华结缕草以其优异的表现成为亚热带地区草坪草建坪中的最佳草种。

A comparative study on photosynthetic characteristics and chlorophyll contents of four Zoysia species

The photosynthesis characteristics and chlorophyll contents of 4 different Zoysia species were studied. The results showed that： 1）the order of chlorophyll contents of 4 species was Z. japonica〉Z, sinica〉 Z. matrella〉Z, tenuifolia ; 2） the light compensation point of Z. japonica and Z. matrella （40 μ（mol/m2·s） was close to natural light compensation point of plants（average of 30 μ（mol/m2·s））;3）the light saturation point and the light compensation point of Z. sinica and Z. tenuifolia were 80 μ（mol/m2·s）and 1 200μmol/μ（mol/m2·s））the apparent quantum efficiency of 4 species was same with the common plants under the natural illumination（0.03-0.06 mol/mol）. Z. sinica was the best among 4 species.