苹果树各器官钙素分布研究

对幼果期富士苹果树不同器官的生物量、含水量、钙含量及钙吸收量进行了研究。结果表明,幼果期富士苹果树干重为10．19 kg,地上部钙含量为5．18-16．66 g／kg,根系为6．60-11.7 g／kg,钙吸收总量为74．29 g,地上部与根系分别为51．38 g和22．91 g;春梢钙含量最高,骨干枝干重最大,果树新生器官(果实、叶片和春梢) 中叶片的干重较大,同时其钙吸收量为新生器官之首;地上部各器官含水量总的趋势是幼嫩器官高于成龄器官,在同一土层中,根干重随根直径减小而减小,而其含水量相反;直径相同的根,其含水量随土层深度增加而增加;果树根系结构组成中,以直径1．0-5．0 cm的根为主,且集中分布在20-40 cm土层中;果树钙贮藏器官主要是骨干枝和直径1．0-5．0 cm的根。

Study of calcium distribution in different organs of apple tree

The biomass, water content , calcium concentration and uptake in different organs of young fruit Red Fuji apple tree were studied in this paper. The results showed that the biomass of tree was 10. 19 kg;Calcium concentration of the above ground part from 5. 18 g/kg to 16. 66 g/kg,the roots system from 6. 60 g/kg to 11. 7 g/kg,total calcium uptake 74. 29 g, calcium uptake of above ground part and the roots 51. 38 g and 22. 91 g,respectively. Calcium concentratin of spring shoots was the highest. The dry weight of scaffold was the heaviest. In the newborn organs (fruits, leaves and spring shoots) of the tree, the dry weight of the leaves were highest,and calcium uptake was the same. The water content of different organs above ground in young organs was higher than that in old organs. The dry weight- of roots reduced along with the diameter in the same soil layer. In the same soil layer the water content of roots increased by the decreasing of the root diameter. In the same root diameter, the water content increased with the depth of the soil. The root in the diameter of 1. 0-5. 0 cm in the apple tree is the main structure. The calcium mainly stored in the scaffold and the root in 1. 0-5. 0 cm.