无患子苗期生物量积累和分配规律研究

通过定量分析无患子苗期生物量的积累和分配规律，并通过SPSS进行回归分析，拟合苗木根与茎生物量的异速生长方程、各器官及全株生物量与苗高、地径的回归关系。结果表明：无患子1年生播种苗生物量积累可划分为幼苗期、速生期和生长后期3个阶段。幼苗期根生物量分配比例最少，叶生物量分配比例最大，分别占全株生物量的1685%和5880 %；进入速生期后，生物量的积累中心逐渐转移到根、茎，而茎是生物量积累的最主要器官，占全株生物量的6155 %。进入生长后期，根、茎进一步木质化，而叶片由于脱落生物量分配比例骤减，仅占全株生物量的1144 %。根与茎生物量的异速积累、苗木各器官及全株生物量与苗木地径、苗高生长量均存在着极显著的相关关系，拟合的数学模型W=005(D2H)0849可靠性较高，可用于指导生产。

The Research on Biomass Accumulation and Distribution Laws of Sapindus mukorossi in Seedling Stage

In this paper, the seedling biomass of Sapindus mukorossi of accumulation and distribution laws was analyzed quantitatively, the growth allometric equation of seedling root and stem biomass was formulated, and the correlation of each organ, whole plant between seedling height, ground diameter was described by means of SPSS regression analyzing. The results showed that: the annual biomass accumulation of the one year old Sapindus mukorossi seedling could be divided into three stages, including the seedling stage, fast growing period, later stage. The allocation proportion of root biomass was the least in seedling stage, but leaf was the largest, respectively accounting for 1685 % and 5880 % of the whole plant. Entering the fast growing period, the center accumulation of biomass gradually transferred to the roots and stems, the stem become the most center of biomass accumulation, accounting for 6155 % of the total plant biomass. At the later stage of growth, root and stem were further lignified, the biomass allocation proportion of leaf reduced sharply because leaves falling, only accounting for 1144 %. The different speed of biomass accumulation of root and stem, and seedling biomass of each organs, whole plant, and ground diameter, height growth both showed extremely significant correlation, the mathematical model was high reliability, could be used to guide the practical production.