专用微生物肥对连作障碍土壤中植株抗逆性的影响

Effect of specific microbial fertilizer on stress resistance of plant in soil with continuous cropping obstable

在不同连作障碍程度的土壤中施用2%专用微生物肥,进行辣椒和番茄盆栽试验,研究专用微生物肥对连作土壤中生长作物的抗逆性影响。结果表明,随着土壤连作障碍程度的加剧,植株的抗逆性降低;施用专用微生物肥后,促进了辣椒和番茄的生长,与对照(施用等量灭菌后的专用微生物肥料)相比,辣椒和番茄植株的株高增加了10.99%～39.49%,鲜重增加了19.27%～163.36%;辣椒和番茄植株的抗逆性显著加强,其中丙二醛含量比对照降低7.8%～24.7%、相对电导率降低7.9%～19.9%、过氧化氢酶活性升高15.4%～46.2%、过氧化物酶活性升高15.2%～29.3%、超氧化物歧化酶活性升高12.6%～52.2%、根系活力上升16.1%～61.4%。以上结果表明,施用专用微生物肥可以提高连作障碍土壤中蔬菜作物的抗逆性,但因土壤连作障碍程度的不同,提高效果有差异。

The effect of specific microbial fertilizer on stress resistance of plant in soil with continuous cropping obstable at various levels was studied by adding 2% specific microbial fertilizer into pot soils for pepper and tomato cultivation.With continuous cropping,the stress resistance of plant decreased.After fertilization,the plant heights and fresh weights of pepper and tomato were increased by 10.99%-39.49% and 19.27%-163.36% compared to control（the sterilized fertilizer）,respective.The stress resistances of pepper and tomato were higher than those in control,the content of MDA（methane dicarboxylic aldehyde） and relative electrical conductivity being decreased by 7.8%-24.7% and 7.9%-19.9%,the activities of catalase,peroxidase and superoxide dismutase being increased by 15.4%-46.2%,15.2%-29.3% and 12.6%-52.2%,and the root activity being increased by 16.1%-61.4%.It suggested that the specitic microbial fertilizer enhanced stress resistance of plant in soil with continuous cropping obstable,and the effectiveness depended on obstale levels.