It is concluded that the mixed stand can be able to be self-rich in soil fertility, which benefit the maintenance and improvement of site fertility under Chinese fir plantation.

表明杉木拟赤杨混交林具有良好的培肥土壤功能，对杉木人工林的地力维持和提高有重要意义。

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The self-fertility of Peiai64S lines collected from the same source but different years were compared and the difference was also found.

另外，对历年培矮64S在气候箱内鉴定的自交结实率的结果进行分析比较，发现不同年度间繁育的培矮64S光温反应特性也存在差异。

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The percentage of self fruited during fertility period is all lower than the controls, thereamong, B30S and 117 are lower than 10%.

可育期套袋自交结实率均低于对照，其中B30S、117的套袋自交结实率低于10％。

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Because very low fertility can become self-reinforcing, with children of one-child families wanting only one child themselves, China now probably faces a long period of ultra-low fertility, regardless of what happens to its one-child policy.

ECONOMIST: Demography

Currently, fertility treatment practices in the U.S. are largely self-regulated.

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