果树苗圃土壤连作障碍的研究初报

以黄潮土为对象，设置不同年限种植果树苗的试验，分析在茬果苗的长势和健康水平，结果表明，果树苗圃土壤的连作障碍随种植年限的延长而加重，且这种障碍效应因果树苗木的种类而异，同一种果树不同的砧木品种对连作土壤的反应存在差异，苗木连作中化感效应受土壤质地的影响，土壤灭菌对连作苗木短期生长的效果不明显，而合理施肥可以明显缓解连作障碍的作用。

A study on soil constraints by prolonged plantation of fruit tree seedling

Experiments of varying year were fruit tree seedling plantation conducted on a sandy loam nursery soil.The growth and infection of pathogens of the trees following the treated plantation were examined.Soil constraints by the tree plantation increased with the plantation years,and were dependent on tree species.Different response to the prolonged plantation was also found among the different stock types of certain tree species.Soil texture seemed to be a major environmental factor influencing the prolonged plantation constraints.The effects of soil sterilization on the constraints were not significant.Well managed fertilization led to relieve the negative constraints by prolonged plantation of young fruit trees.