Selection of efficient VA mycorrhizal fungi for inoculating<i>Casuarina equisetifolia</i>

Vasanthakrishna, M.; Bagyaraj, D. J.

doi:10.1080/15324989309381370

Cited by 10 publications

(1 citation statement)

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“…It is possible that C. equisetifolia is not strongly limited by P because it can form symbiotic associations with both ecto-and endomycorrhizal fungi (Diagne et al, 2013). Several studies have shown that growth and N and P accumulation in C. equisetifolia seedlings are enhanced significantly by inoculation with effective symbionts (Muthukumar & Udaiyan, 2010;Sempavalan et al, 1995;Vasanthakrishna & Bagyaraj, 1993;Ye, 1996). The low estimated P uptake by C. equisetifolia, increased availability of soil P with fertilization, and the storage of additional P in woody tissues (branches) indicate that P supply exceeded demand (Table S5), suggesting that P was not limiting to plantation growth in our study area.…”

Section: The Effects Of Fertilization On Soil and Plant Characteristicsmentioning

confidence: 99%

Nutrient addition enhances carbon sequestration in soil but not plant biomass in a coastal shelter plantation in South China

et al. 2021

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Casuarina equisetifolia plantations have been widely established along tropical and subtropical coasts, where they act as a windbreak to shelter coastal areas. These shelter plantations also fulfill another important ecosystem service by sequestering large amounts of carbon (C). However, shelter plantations are usually established on nutrient-poor sand dunes, which may limit tree growth and therefore C sequestration rates. To assess whether fertilization increases the C sequestration of coastal shelter plantations, we conducted a fertilization experiment in a young C. equisetifolia plantation with four treatments: nitrogen addition (+N), phosphorus addition (+P), nitrogen and phosphorus addition (+NP), and controls (CK). We quantified nutrient availability and annual net ecosystem production (NEP) during the key early establishment phase. Fertilization with +N and +P significantly increased ammonium-N and extractable P in the surface soils and the N and P concentrations of branches, respectively. Surprisingly, the mean growth rate of C. equisetifolia plantations (24.59 ± 0.66 Mg ha À1 yr À1 ) was not affected by fertilization. The mean NEP was 6.18 ± 0.49 Mg C ha À1 yr À1 , and there was no difference among fertilization treatments. However, soil organic C significantly increased by 41% and 36% with +N and +P, respectively, but not +NP. C. equisetifolia plantations can sequester large amounts of C in biomass on poor soils without the need for additional nutrients, although fertilization may enhance soil C storage. Considering the potential large planting area, we suggest that coastal C. equisetifolia shelter plantations could be an important naturebased solution for climate change mitigation in coastal regions.

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