伊勢ツバキ林の花粉生産

概要

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The production rates of pollen, flowers and fruits in a 102-year old Camellia japonica stand were studied in 2000-2003. The rates, in terms of number and dry weight on an area basis, were measured using 24 litter traps set within a 20×26m plot. Pollen yields per flower have been reported previously. Pollen production rates, obtained by multiplying the pollen yield per flower by the number of open flowers per ha, were estimated to be 0.790-1.83×10^<12> (mean, 1.49×10^<12>) grains/ha, and 60.0-139 (mean, 113) kg/ha. Annual fluctuation of pollen production rates during four consecutive years, represented as the ratio of the maximum rate relative to the minimum, was 2.3. The investment of photosynthates in reproduction or total dry matter of flowers and fruits, including pollen, in the stand was 1,470-2,241 (mean, 1,998) kg/ha. Pollen allocation among total matter was 4.1%-6.7%, with a mean of 5.7%.
日本花粉学会の論文
2006-12-31