以宁杞1号为研究材料，对枸杞不同树龄的物候期、枝条生长量、光合速率和叶绿素含量进行调查分析。结果表明，13年龄植株的萌芽期、展叶期、现蕾期、开花期、新稍生长期均较其他树龄提前，尤其以萌芽期、展叶期、新稍生长期提前更明显。枝条日生长速度与树龄的关系表现为低龄树大于高龄树，即树龄越小，枝条生长越快，树龄越大枝条生长就越慢。不同树龄叶片光合速率从强到弱依次为13年树龄、17年树龄、8年树龄、5年树龄、22年树龄。最高的13年树龄比最低的22年树龄叶片的光合速率高出37%，不同树龄叶片叶绿素含量存在显著差异，随着树龄增大叶绿素含量逐步降低，以22年树龄含量下降最为明显。

The phenology period， branch growth， photosynthetic rate and chlorophyll content of Lycium barbarum L. at different tree ages were investigated using Ningqi 1 as experiment material. The results showed that the germination stage， leafing stage， budding stage， flowering stage and new shoots growth stage of 13-year-old plants were earlier than those of other trees， especially in the germination stage， leafing stage and new shoots growth stage. The relationship between the daily growth rate of branches and tree age is that younger trees are larger than older trees. that is， the younger the tree age， the faster the branch growed， and the older the tree age， the slower the branch growed. The photosynthetic rates of leaves of different tree ages from strong to weak were 13 years old， 17 years old， 8 years old， 5 years old and 22 years old， respectively. The photosynthetic rate of the leaves with the oldest tree age of 13 years old was 37% higher than that of the leaves with the youngest tree age of 22 years old. There were significant differences in chlorophyll content of leaves with different tree ages， and the chlorophyll content decreased gradually with the increase of tree age， and the decrease of chlorophyll content was most obvious at 22 years old.

S567.19

银川市科技攻关项目(05-01-21)。