关键词:甘蔗; 茎伸长量; 气象因子; 新植蔗; 宿根蔗 Effects of Meteorological Factors on Stalk Elongation in New-planting and Ratooning Sugarcane CHEN Yan-Li1,2,3, FENG Li-Ping1,*, DING Mei-Hua2,3, MO Wei-Hua2,3, KUANG Zhao-Min2,3 1College of Resources and Environment, China Agricultural University, Beijing 100193, China
2Guangxi Meteorological Disaster Mitigation Institute / Remote Sensing Application and Validation Base of NSMC, Nanning 530022, China
3Joint Laboratory for GIS Application, Nanning 530022, China
Fund:This study was supported by the National Key Basic Research Program of China (2013CB430200), the Special Fund for Meteorological Research for Public Interest (GYHY201406030) and the National Natural Science Foundation of Guangxi (2013GXNSFAA019282) AbstractSugarcane stalk elongation is the most important factor for the development evaluation and yield estimation, on which meteorological factors have significant effects. Differences between new planting sugarcane and ratooning sugarcane in development and response to meteorological factors need to be analyzed for promoting agricultural production. In this paper, taking new-planting sugarcane and ratooning sugarcane of Guangxi as the research materials, observed sugarcane agronomic data and meteorological information at four agro-meteorological experimental stations from 2000 to 2011 were used to analyze the relationship between stalk elongation and meteorological factors that were precipitation, relative humidity, maximum temperature, minimum temperature, mean temperature, air pressure, and sunshine hours at different stages. The results show that there was an obvious difference between new-planting sugarcane and ratooning sugarcane in stalk height. During the sugarcane stem elongation, compared with ratooning sugarcane, new-planting sugarcane had a higher stalk height with a lower background in most of years, besides, its total stem elongation amount was much more but elongation duration was short. There was a significant correlation between stalk elongation and most meteorological factors in both new-planting sugarcane and ratooning sugarcane. The effect of most meteorological variables was larger in new-planting sugarcane than in ratooning sugarcane. The correlation between new-planting sugarcane and meteorological factors are obviously higher than that of ratoon sugarcane. Minimum temperature, relative humidity and maximum temperature played a direct positive role on stalk elongation in both new-planting sugarcane and ratooning sugarcane, and average temperature and air pressure played a direct negative role, meanwhile, accumulated temperature and rainfall play a significant indirect effect through other meteorological factors. There was a significant lag in the response of stem elongation to rainfall for both new-planting sugarcane and ratooning sugarcane. Compared with ratooning sugarcane, lag of new-planting sugarcane was longer. The total lag time was about 20 days for new-planting sugarcane and 10 days for ratooning sugarcane. There was also a lag in response to sunshine hours for new-planting sugarcane, but no lag to temperature for both sugarcanes.
Keyword:Sugarcane; Stalk elongation; Meteorological factors; New-planting sugarcane; Ratoon sugarcane Show Figures Show Figures
图3 新植蔗和宿根蔗茎伸长量与各旬温度类气象因子相关性 n: 新植蔗; r: 宿根蔗。Fig. 3 Relationship between sugarcane stalk elongation and climate variables related to temperature in Guangxi n: new plant sugarcane; r: ratooning cane.
图4 新植蔗和宿根蔗茎伸长量与各旬日照时数、气压相关性 n: 新植蔗; r: 宿根蔗。Fig. 4 Relationship between sugarcane stalk elongation and other climate variables in Guangxi n: new plant sugarcane; r: ratooning cane.
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