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Litters of reproductive organs have rarely been studied despitetheir role in allocating nutrients for offspring reproduction. This studydetermines the mechanism through which flower litters efficiently increasethe available soil nutrient pool. Field experiments were conducted to collectplant litters and calculate biomass production in an alpine meadow of theeastern Tibetan Plateau. C, N, P, lignin, cellulose content, and theirrelevant ratios of litters were analyzed to identify their decompositionfeatures. A pot experiment was performed to determine the effects of litteraddition on the soil nutrition pool by comparing the treated and controlsamples. The litter-bag method was used to verify decomposition rates. Theflower litters of phanerophyte plants were comparable with non-flowerlitters. Biomass partitioning of other herbaceous species accounted for10–40 % of the aboveground biomass. Flower litter possessedsignificantly higher N and P levels but less C ∕ N, N ∕ P,lignin ∕ N, and lignin and cellulose concentrations than leaf litter. Thelitter-bag experiment confirmed that the flower litters of<i>Rhododendron przewalskii</i> and <i>Meconopsis integrifolia</i>decompose approximately 3 times faster than mixed litters within 50 days. Potexperiment findings indicated that flower litter addition significantlyincreased the available nutrient pool and soil microbial productivity. Thetime of litter fall significantly influenced soil available N and P, and soilmicrobial biomass. Flower litters fed the soil nutrition pool and influencednutrition cycling in alpine ecosystems more efficiently because of theirnon-ignorable production, faster decomposition rate, and higher nutrient contents compared with non-flower litters. Theunderlying mechanism can enrich nutrients, which return to the soil, andnon-structural carbohydrates, which feed and enhance the transitions of soilmicroorganisms

Flower litters of alpine plants affect soil nitrogen and phosphorus rapidly in the eastern Tibetan Plateau