JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 62 ›› Issue (03): 9-16.doi: 10.3969/j.issn.1000-2006.201810005

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The effects of arbuscular mycorrhiza fungi on the growth of mulberry in different nursery substrates

HUANG Xiaohui1,2, CHEN Daojing1, FENG Dalan1*   

  1. 1.Chongqing Academy of Forestry, Chongqing 400036, China; 2. College of Forestry, Beijing Forestry University, Beijing 100083, China
  • Online:2019-05-15 Published:2019-05-15

Abstract: 【Objective】The effect of arbuscular mycorrhiza fungi on the growth of mulberry in different nursery substrates was studied to select the better nursery substrates and arbuscular mycorrhiza fungi for cultivating mulberry seedlings, in the hope of providing a technical support for the development of ecological and economic industries of mulberry.【Method】Six arbuscular mycorrhizal fungi. Ga(Glomus aggregatum), Gc(G. caledonium), Gi(G. intraradices), Gv(G. versiforme), BGCH(G. intraradices BGC HEB07D)as well as BGCX(G. etunicatum BGC XJ03C), and three nursery substrates, P1 [V(cow dung):V(mushroom residue):V(pearlite):V(yellow soil)= 6.0:3.0:0.5:0.5], P2 [V(cow-dung):V(mushroom residue):V(pearlite):V(yellow soil)= 6:2:1:1], and P3(yellow soil only), were used to evaluate the effect of arbuscular mycorrhizal fungi on the growth of mulberry on different nursery substrates. 【Result】The colonization rate of Gc, BGCX and BGCH was the highest on mulberry. Additionally, the colonization rate in mulberry grown on P1 substrate was significantly(P<0.05)higher than that observed in substrates P2 or P3. The highest germination rate was observed in mulberry seeds inoculated with Gc and BGCH. Similarly, the germination rate of mulberry seeds grown on P1 substrate was better than of those grown on the other two substrates. The plant height, base diameter, root surface, root length, number of root tips and root biomass of mulberry inoculated with arbuscular mycorrhizal fungi were all significantly(P<0.05)higher than those observed in mulberry that was uninoculated. Additionally, these parameters were the highest in mulberry inoculated with Gc, Gv and BGCH and were also significantly(P<0.05)better in mulberry grown on P1 substrate than in those grown on P2 and P3 substrate. The net photosynthetic rate, water use efficiency, maximum chemical efficiency of photosystem Ⅱ, antenna conversion efficiency of photosystem Ⅱ, actual primary photochemical efficiency, and photosynthetic electron transfer rate of mulberry inoculated with arbuscular mycorrhizal fungi were all significantly(P<0.05)higher than those of mulberry that was uninoculated. These parameters were the highest in mulberry inoculated with Gc, Gv and BGCH and were also significantly(P<0.05)better in mulberry grown on P1 substrate than in that grown on P2 or P3 substrate.【Conclusion】All six arbuscular mycorrhizal fungi promoted the growth of mulberry, among which Gc and BGCH were the best. Also, P1 substrate was much better than P2 or P3 substrate.

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