黄连木苗期年生长节律及其生物量分配规律

摘要

In order to provide some references for production and management ofPistacia chinensisseedlings, on the basis of periodic observation, annual growth dynamics, biomass accumulation and biomass distribution inP. chinensis seedlings were investigated, as well as correlation between growth indexes and biomass components. The results showed that the height, ground diameter, crown width growth showed“S” curves in the whole process ofP. chinensisseedling growing, and their dynamic growth rhythms could be well iftted by Logistic growth equation and growth curves. The growth process was divided into four stages according to the actual measurement values, including seedling stage, early growth stage, rapid growth period, and late growth stage. At rapid growth period, increment of each index was more than 50% of the total increment. The ratio of biomass of the aboveground part of one-year-old P. chinensisseedlings to that of the underground part was 1.78∶1.00. Among seedling biomass, ground diameter was signiifcantly correlated with seedling height, stem dry mass and leaf dry mass, seedling height was signiifcantly correlated with stem dry mass and leaf dry mass, and stem dry mass were very signiifcant correlated with leaf dry mass.%为给黄连木幼苗生产管理提供参考，在定期观测的基础上，研究黄连木苗期年生长动态、生物量积累与分配规律以及植物生长指标与生物量组分的相关性。结果表明：在整个苗期生长过程中，黄连木的苗高、地径、冠幅生长均呈现“S”型曲线，用Logistic生长方程和生长曲线能对其动态生长节律进行很好地拟合。结合实际测量值将黄连木1年生幼苗的生长过程分为4个阶段：出苗期、生长初期、速生期和生长末期。各指标速生期的生长量占其总生长量50%以上；黄连木1年生苗木的地上与地下部分生物量比例为1.78∶1.00；苗木生物量各指标中，地径与苗高、茎干质量、叶干质量显著相关，苗高与茎干质量、叶干质量显著相关，茎干质量与叶干质量极显著相关。