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以野生茄‘托鲁巴姆’(Solanum torvum)为砧木,茄子(S.melongena)‘西安绿茄’品种为接穗,研究了嫁接茄根际土壤微生物生理类群和土壤水解酶活性及叶片硝酸还原酶活性的动态变化特点,分析了嫁接茄根际土壤微生物生理类群和土壤水解酶与叶片硝酸还原酶活性的关系,探讨了嫁接提高茄子氮素转化和吸收与土壤生物活性的关系。结果表明:嫁接茄根际土壤微生物生理类群和土壤水解酶活性均较自根茄有增加的趋势。但不同发育时期也有一定的变化。嫁接茄叶片硝酸还原酶活性随着生育均表现出逐渐增加的趋势,且显著高于自根处理。嫁接茄的固氮菌、硝化细菌和脲酶与其叶片硝酸还原酶活性均呈显著或极显著正相关。总体上看,嫁接显著增加了茄子根际土壤固氮菌、硝化细菌和脲酶活性,嫁接茄株也表现出较高的硝酸还原酶活性。
The physiological characteristics of soil microbial communities and soil hydrolase activities and the nitrate reductions in leaves of G. graminearum were studied with the solanum torvum as rootstock and S. melongena ’ The dynamic changes of soil enzyme activities and activities of rhizospheric soil microbial rhizosphere rhizosphere were analyzed. The effects of grafting on nitrogen translocation and absorption and soil biological activity were also discussed. The results showed that the rhizosphere soil microbial biomass and soil hydrolytic enzyme activities of grafted eggplant were higher than those of self-rooted tomato. However, different developmental stages also have some changes. The nitrate reductase activity of grafted tomato leaves showed a trend of increasing with the growth, and was significantly higher than the self-root treatment. Azotobacter, nitrifying bacteria and urease of grafted eggplant had significant or very significant positive correlation with nitrate reductase activity of their leaves. Generally speaking, grafting significantly increased the activities of nitrogen-fixing bacteria, nitrifying bacteria and urease in the rhizosphere soil of eggplants. The grafted tomato plants also showed high nitrate reductase activity.