Effects of Arbuscular Mycorrhizal Fungi and Application of Different Nitrogen Fertilizers on Nutrient Absorption of Chinese Fir Seedlings

Abstract:

In order to understand the effects of arbuscular mycorrhizal fungi (AMF) and addition different forms of nitrogen on the growth and nutrient uptake of Chinese fir (Cunninghamia lanceolata), the seedlings at 1-year-old were inoculated AMF (Glomus mosseae, Gm) and treated with different forms of nitrogen (NH₄⁺-N and NO₃^--N), the changes in nutrient elements and growth status were studied. The results showed that AMF increased significantly the seedling height, biomass and the uptake of N, P, K, Ca, Mg, Fe and Na, and the promotion effect of AMF on trace elements of Fe and Na was generally stronger than that of macro elements of K and Ca. Compared with the addition of NO₃^--N, the positive effect of AMF on biomass, C, N, Ca, Mg and Mn contents were more significant with the NH₄⁺-N addition. Moreover, the increased magnitude was stronger in leaves than that in root and stem. Therefore, it was suggested that the inoculation of AMF promoted the growth and nutrient uptake of Chinese fir seedlings. Additionally, the positive effects of AMF on growth and nutrient uptake treated with NH₄⁺-N were more prominent than that with NO₃^--N.