赤黄壤酸化后对油松种子萌发的影响  

EFFECT OF REDYELLOW SOIL ACIDIFEICATION ON SEED GERMINATION OF CHINESE PINE

作　　者：唐鸿寿[1] 

机构地区：[1]中国科学院生态环境研究中心系统生态开放研究室

出　　处：《生态学报》1999年第2期200-205,共6页Acta Ecologica Sinica

摘　　要：赤黄壤酸化后，化学性质和物理性质的均发生明显变化，ＰＨ值下降，并淋溶出大量对植物生长有害的Ａｌ离子。土壤团粒结构受到破坏，土壤的保水性增加，通气性变差，粘度增加，油松种子在酸化后的赤黄壤中萌发率下降，其直接原因是土Ａｌ离子大量增加，间接原因是土壤ＰＨ值下降，部分油松种子萌发后，因土壤粘度增加，针叶被粘在土内，最终导致的幼苗死亡。赤黄壤粘度增加由于土壤酸化后，粒径普遍变小。After acid treatment,the chemical and physical properties of redyellow soil significantly changed.The pH decreased,and numerous Al ions,which are harmful to plant growth,were leached.The structure of soil aggregates was damaged,followed by an increase of soil stickiness and water maintainability,and a decrease of air penetrability.The germination of Chinese Pine (Pinus tabulacformic Carr).seeds decreased after sowed in redyellow soil acidified by H2SO4 solution.The direct cause was an increase of a large number Al ions,and the indirect cause was pH decrease (pH≥3.5).After a part of seeds germinated,for the stickiness of soil increased,the needles were sticked together in the soil,and finally the seedings died.The stickiness increase of redyellow soil was caused by the universal change because of the diameter of soil aggregates which became to be smaller,and by the increase of microaggregates which are less than 250μm.

关 键 词：赤黄壤 酸化 油松 铝离子 土壤团粒 种子萌发 

分 类 号：S791.254[农业科学—林木遗传育种]