Using 2 years old azaleas seedlings as test materials, setting up J1 (four kinds of azaleas mycorrhizal fungi), J2 (four kinds of azaleas mycorrhizal fungi and a kind of Pinus massoniana exogenous fungus), J3 (CK) three inoculation ways and with different levels of nutrient elements N, P, K, with Pearson correlation analysis and stepwise regression analysis method of statistics, the correlation between rhizosphere mycorrhizal fungus infection and soil fertility index was analyzed. The results showed that the soil infection rate and nutrient content of the inoculation treatment were significantly higher than that of the non-inoculation treatment. Under each inoculation treatment, the application of N, P, and K nutrients was 1 level (ie, urea 2.2 g, calcium magnesium phosphorus 1.9 g, potassium chloride 1.4 g per plant) could promote the accumulation of soil nutrient content, the application of P, K of 1/4 and N, P, K of 1/2 level under J2 treatment could also promote the accumulation of total nitrogen, available nitrogen and total potassium in the soil. Through correlation analysis, it was found that the infection rate of J1 treatment was positively correlated with total nitrogen content, the infection rate of J2 treatment was extremely significantly positively correlated with available potassium content, and the organic matter and available nitrogen content were significantly positively correlated with J3 treatment. Through stepwise regression analysis, it was found that the main fertility factors influencing the mycorrhizal fungal infection rate of rhododendron seedlings were total nitrogen, available nitrogen and available potassium.
YANG Shu-ting
,
OU Jing
,
LI Lin-pan
. Relationship Between Rhizosphere Soil Fertility and Mycorrhizal Fungi Infection of Azalea[J]. Subtropical Plant Science, 2020
, 49(03)
: 185
-190
.
DOI: 10.3969/j.issn.1009-7791.2020.03.005
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