施肥对闽北三耕土杉木幼林光合特性的影响

Effect of Fertilizer on the Photosynthesis Characteristic of Chinese fir Young Plantation Under the Third Successive Rotation

研究结果表明 ,施肥不同程度提高了三耕土杉木幼树的光合能力 ,但只有当高的光合能力与较低呼吸相配合时 ,才能形成高光合系数 ,如 M(氮磷钾 + Fe、Mn、Zn、Cu等多元微肥 )、NPK.另外 ,林冠下层的杉木枝条针叶 ,净光合强度上部 >中部 >下部 。

This paper analyzes the effect of fertilizer on photosynthesis Characteristic of Chinese fir young plantation under the third successive rotation The results showed that photosynthetic rates are increased after fertilizer in different range,but only higher photosynthesis rate combining with lower respiration rate can greatly improve photosynthesis coefficient,such as treatments M(NPK+ trace element Fe?Mn?Zn?Cu) and NPK In addition,photosynthesis rates in different crown strata of Chinese fir is top>middle>lower level,and photosynthesis rates reduce by exponential with leaf age accretion