不同立地类型对无患子生长及主要经济性状的影响

Effects of site type on the growth and main economic traits of Sapindus mukorossi Gaertn.

对无患子原料林中4种立地类型进行样地调查,研究不同立地类型对无患子生长及主要经济性状的影响。结果表明,无患子多数性状在不同立地类型间差异显著,阳面田地和阳面坡地原料林无患子胸径、冠幅较大,果序结实数较多,单株产量亦较高,而阴面坡地和阴面田地较小。在3 m×3 m的种植密度下,阳面田地原料林结实植株百分率最高,达92.98%。在无患子果实成熟期,土壤中较高含量的氮素保证了原料林后期的营养生长,使得光合作用增强,可能是促成阳面田地无患子原料林单株产量最高的重要原因。

Sample plot surveys on four site types in raw material forest of Sapindus mukorossi were made in order to study the effect of different site types on the growth and main economic traits. The results showed that the majority of those traits had significant differences among different site types. Diameter at breast height and canopy of the individuals in the sunny side were bigger than those in the shady side while fruits number per infructescence was larger and yield per individual in the sunny side was higher than those in the shady side. The highest percentage of individuals,which were planted with the density of 3 m × 3 m and had fruits in the paddy field from the sunny side,was 92. 98%.High content of nitrogen in soil contributed to the vegetative growth of the raw material forest in fruit mature period,which promoted the photosynthesis,therefore this might be the important reason why the individuals had the highest yield in the sunny paddy field.