接种菌根真菌的旱作水稻-绿豆间作系统养分利用研究

【目的】研究接种AMF对旱作水稻-绿豆间作系统作物生长和养分利用的影响。【方法】利用温室盆钵试验接种AMF,测定AMF的侵染率、作物养分含量、绿豆生物固氮能力和土壤养分变化。【结果】在间作接种条件下,接种菌根菌对绿豆的侵染率达到92.28%,而水稻侵染率仅为14.47%,与单作不接种相比,分别提高了11.95%和4.11%;同时也增加了绿豆和水稻的地上部和地下部氮含量,分别是83.72%和64.83%,53.76%和41.29%;绿豆地上部和地下部铁含量分别增加了223.08%和60.19%;生物量最大增加了288.8%;根瘤个数和根瘤重量也有大幅度的增加。间作接种AMF处理绿豆根瘤的氮、磷和铁的含量,比单作不接种处理分别增加了80.14%、69.54%和139.62%。与单作水稻相比,单作绿豆和水稻与绿豆间作可显著提高土壤氮含量;绿豆单作处理或与水稻间作不接菌根真菌处理土壤磷含量没有显著变化,只有间作接菌处理的土壤磷含量显著降低。【结论】在旱作水稻-绿豆间作系统中接种菌根真菌改善了水稻和绿豆植株体内氮、磷和铁的含量;增加了绿豆根瘤个数及其干重,明显促进了绿豆的生长。

Effect of Inoculation with Arbuscular Mycorrhizal Fungus on Nitrogen and Phosphorus Utilization in Upland Rice-Mungbean Intercropping System

[Objective]The effect of Arbuscular mycorrhiza fungi(AMF)on plant growth and nutrient utilization in upland dee and mungbcan intercropping system was studied.[Method]A pot experiment was conducted in greenhouse and AMF colonization rates of rice and mungbean's root, plant nutrient content and the ability of nitrogen fixation, and the changes of nutrient content in soil were analyzed.[Result]The results of the experiment showed that the rate of AMF colonization of rice and mungbean's root reached 14.47% and 92.2% in intercopping system, and increased by 4.11% and 11.95%, respectively, compared with that in monocropping system.At the same time the nirtrogen content in shoots and roots of mungbean and rice increased by 83.72% and 64.83%, 53.76% and 41.29%, and the content of iron in shoots and roots of mungbean increased by 223.08% and 60.19%, repectively.For the intercropping crops inoculated with AMF, the biomass of mungbean increased by 288.8%, whereas the rice biomass had no significant change in all treatments with or without inoculation of AMF, the number and dry weight of nodules also significantly increased when mungbean inrercropped with rice and inoculated with AMF.In contrast to that of non-inoculation with AMF and monocropping, the content of nitrogen, phosphorus and iron in intercropped mungbean's nodules with inoculation increased by 80.14%, 69.54%, 39.62%, respectively.Additionally, intercropping with AMF inoculation significantly increased soil nitrogen content, but reduced soil phosphorus content.[Conclusion]It is concluded that nitrogen, phosphorus and iron content, the numbers and dry weight of mungbean nodules increased, and the growth of mungbean was improved in upland rice-mungbean intercropping system inoculated with AMF.