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为了消灭土壤中的线虫、病原菌、病毒,防治苗木猝倒病,抑制杂草种子发芽,用土壤熏蒸剂进行土壤消毒,结果苗木生长受抑制,植株矮小。美国宾夕法尼亚州桃树苗圃,在消过毒的土壤上培育的桃树实生苗,高只有正常苗高的2/3,生长严重受抑的苗高只有正常苗高的1/2,不宜作芽接的砧木。因为土壤消毒消灭了病原菌等有害微生物,但也消灭了土壤中的有益微生物,如菌根菌、根瘤菌等。有共生菌根的树种,菌根能增加根系的吸收能力。土
In order to eliminate soil nematodes, pathogens, viruses, seedling damping-off prevention and control weeds seed germination, soil fumigation with soil disinfection, the results of seedling growth inhibition, plant dwarf. Peach nurseries in the United States of Pennsylvania, peach seedlings nurtured in sterile soil, peach seedlings only high, the normal height of 2/3, the height of the growth inhibition of the seedling height is only normal, 1/2, should not budding Rootstock. Because soil disinfection eliminates pathogenic bacteria and other harmful microorganisms, but also eliminated the beneficial microorganisms in soil, such as mycorrhizal bacteria, Rhizobium and so on. Symbiotic mycorrhizal species, mycorrhizal roots can increase the absorption capacity. earth