The rate of seed - setting was measured as 1.9 % in natural population.

在自然居群中测定四合木结籽率为1.9%.

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Keep the natural population growth within 4.6, optimize the new - born population's qualification constantly.

人口自然增长率保持在4.6以内, 不断优化出生人口素质.

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This experiment examined natural population variation in chemical constituents and pulping properties of Pinus massoniana Lamb.

研究马尾松木材化学组分、制浆性能在群体中的变异及不同伐龄木材制浆造纸适应性.

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