黄瓜单砧与双砧嫁接对根际土壤微生物和酶活性的影响

以自根为对照，研究了单砧和双砧嫁接对春茬和秋茬黄瓜产量、根际土壤微生物数量和酶活性的影响。结果表明：与自根对照相比，单砧与双砧嫁接均显著增加了黄瓜产量和根际土壤细菌和放线菌数量，显著降低了土壤真菌和尖孢镰刀菌（黄瓜病原菌）数量；其中单砧嫁接比双砧嫁接对放线菌和尖孢镰刀菌的影响大；秋茬黄瓜根际土壤脲酶、中性磷酸酶、蔗糖酶和过氧化氢酶活性大小依次为双砧嫁接＞单砧嫁接＞自根对照。

Effects of Single-root-grafting and Double-root-grafting on Cucumber Rhizosphere Soil Microorganism and Enzyme Activity

This experiment was conducted to study the effects of self-root-grafting（as control），single-root-grafting and double-root-grafting on cucumber yield，rhizosphere microorganism population and enzyme activities in spring and autumn seasons．The results showed that both single-root-grafting and double-root-grafting could significantly increase cucumber yield，populations of soil bacteriam and actinomycetes，decrease the population of fungi and Fusarium oxysporum（cucumber pathogen）．The single-root-grafting significantly decreased the population of Fusarium oxysporum and increased the population of actinomycetes than the double-root-grafting．The order of rhizosphere soil urease，neutral phosphatase，invertase and catalase activity of cucumber produced in autumn were double-root-grafting > single-root-grafting > self-root-grafting（control）．