| 姚锋先,郭家乾,管冠,刘桂东,周高峰,钟八莲.晚棱脐橙冬季落果和果实出汁率差异的环境温度因素分析[J].中国南方果树,2017,46(4): |
| 晚棱脐橙冬季落果和果实出汁率差异的环境温度因素分析 |
| Analysis of Ambient Temperature Factors about Differences for Lane Late Navel Orange Winter Fruit Drop Rate and Juice Rate |
| 投稿时间：2017-04-15 修订日期：2017-04-28 |
| DOI： |
| 中文关键词: 晚棱 落果 出汁率 低温 |
| 英文关键词:Lane late navel fruit drop rate juice rate low tepmerature |
| 基金项目: |
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| 摘要点击次数: 2099 |
| 全文下载次数: 2363 |
| 中文摘要: |
| 利用果园12月初至3月上旬的温度监测数据，对比分析了两个冬季落果和果实出汁率差异较大年份冬季低温的发生特点及其对晚棱果实越冬的影响。结果表明，两个生产季冬季冰点以下低温的发生频率一样，但极端低温强度、持续时间存在差异。12月~2月份每月极端低温依次为-0.7℃、-1℃和-3℃的2016-2017生产季冬季落果率为18.4%、果实出汁率为57.4%，而冬季落果率和果实出汁率分别为54.6%和34.3%的2015-2016生产季冬季每月的极端低温依次为-2℃、-4.9℃和-3.9℃；从单次冰点以下低温持续时间来看，2015-2017两个生产季分别为2~8个小时和4~13个小时；从日均温来看，两个生产季主要在5~20℃之间，低于5℃的天数2015-2016生产季是8天，而2016-2017生产季仅4天。由此可见，-3℃以下极端低温加剧了冬季晚棱脐橙果实落果和导致果实出汁率的下降，此外，冰点以下低温和日均温低于5℃持续的时间均可能与晚棱冬季落果和果实出汁率下降有关。 |
| 英文摘要: |
| Based on the temperature monitoring data of orchard from early December to early March. Compare analysis the occurrence characteristics of winter low temperature during the two production years, and the effect of which on the Lane late navel fruit. The results indicated that the occurrence frequency of low temperature below the freezing point was same in different production years, however, the extreme low temperature strength and duration were different. Each month from December to February, extreme low temperature was -0.7℃, -1℃ and -3℃ in 2016-2017 with 18.4% winter fruit drop rate and 57.4% juice rate. While there was 54.6% winter fruit drop rate and 34.3% juice rate in 2015-2016 with extreme low temperatures of -2℃, -4.9℃ and -3.9℃. The duration of low temperature below the freezing point in 2015-2016 and 2016-2017 was 2 to 8 hours and 4 to 13 hours respectively. The daily average temperature of the two production years mainly between 5℃ and 20℃. And there were 8 days with daily average temperature less than 5℃ in 2015-2016, While only 4 days in 2016-2017. It can be seen that the extreme low temperature below -3°C exacerbates the fruit drop and the decrease of the juice yield. In addition, the low temperature below the freezing point and the daily average temperature below 5℃ may be related to the winter fruit drop and juice rate decreased. |
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