JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (1): 53-62.doi: 10.12302/j.issn.1000-2006.202007051

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Observation on flowering phenology and variety combination of Carya illinoinensis in low mountains and hills of Hunan Province

JIANG Yao1(), WEI Hailin2(), GAO Changhu3, WANG Dagu4, FENG Nanke1, LI Rui1, LIU Rongrong1, LYU Fangde1   

  1. 1. Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees of Ministry of Education, Key Laboratory of Non-Wood Forest Products of State Forestry Administration, Hunan Collaborative Innovation Center for Non-Wood Forest Cultivation and Utilization, Central South University of Forestry and Technology, Changsha 410004, China.2. Hunan Academy of Forestry, Changsha 410004, China.3. Forestry Bureau of Hecheng District, Huaihua 418000, China.4. Agricultural Bureau of Zhongfang County, Huaihua 418005, China
  • Received:2020-07-23 Accepted:2020-08-21 Online:2021-01-30 Published:2021-02-01

Abstract:

【Objective】 The purpose of this study was to observe the flower development characteristics and flowering phenology of 14 Carya illinoinensis in Hunan Province, and to determine a suitable variety of combinations. 【Method】 Taking 7-year-old C. illinoinensis in Huaihua City, Hunan Province as materials, the flowering time, flower development morphology, pollen dispersal period and receptive period of female and male flowers were observed, and the climatic conditions of the flower development period were recorded and analyzed. 【Result】 Among the 14 varieties of C. illinoinensis, four varieties were protogynous, five varieties were protandrous, and five varieties were monochogamous. Female flowers generally entered the budding period in late April and entered the receptive period in mid-May. The male flowers entered the elongation period in late April and early May and entered the pollinating period in early to mid-May. It was concluded that ‘Mississippi’, ‘YaLin No. 100’, ‘Wichita’, ‘Stuart’ and ‘Caddo’ had a self-pollination ability in this region, and the suitable variety combinations were ‘XiangLin No. 1’ × ‘Forket’; ‘Mississippi’ × Caddo’; ‘Kiowa’ × ‘Tejas’, ‘Kiowa’ × ‘Stuart’ or ‘Kiowa’ × ‘Mahan’; ‘Pyzner’ × ‘Tejas’, ‘Pyzner’ × ‘Mahan’ or ‘Pyzner’ × ‘Stuart’; ‘Pawnee’ × ‘Tejas’ or ‘ Pawnee’ × ‘Mahan’; ‘Pyzner’ × ‘Tejas’ or ‘Pyzner’ × ‘Mahan’. 【Conclusion】 The flowering phenology of different varieties of C. illinoinensis is an important basis for establishing orchards. The results of this experiment provide a reference for the variety combinations of C. illinoinensis in Hunan and the hilly areas of central and southern China.

Key words: Carya illinoinensis (Wangenh.) K. Koch, flower development characteristics, flowering phenology, variety combination, Hunan Province

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