PJB-2019-431
ANALYZING PATTERNS OF SEED PRODUCTION FOR CHINESE TORREYA
Xiongwen Chen
Abstract
Chinese torreya (Torreya grandis cv. Merrillii) is an important economic tree in China, but there are limited studies on its seed yield. We analyzed the patterns of seed production at two sites (Zhaojiazhen and Jidongzhen) for Chinese torreya from different perspectives based on historical data. The results indicate that there were no 3-year or multi-year cycles in its seed production. A positive correlation existed between the average seed production and the average annual air temperature in five or ten years at both study sites. There was no trend of increasing coefficient of variance (CV) in seed production, but CV generally increased before 1975 and after then CV became flat. Frequency power law existed in seed production at both sites, but Taylor’s Law only existed at Zhaojiazhen. The multiscale entropy decreased with time scales and the patterns were similar at both sites. Our research results provide new understanding of seed production for Chinese torreya.
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