| 基于GIS的赤水市金钗石斛农业气候区划 |
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| 引用本文： | 罗天虎.基于GIS的赤水市金钗石斛农业气候区划[J].河南气象,2014(2):70-73. |
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| 作者姓名： | 罗天虎 |
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| 作者单位： | 绥阳县气象局,贵州绥阳563300 |
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| 基金项目： | 公益性行业（气象）科研专项（GYHY（QX）20070607）资助 |
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| 摘 要： | 石斛是热带、亚热带丛生植物,喜温暖湿润气候。赤水市是我国目前金钗石斛最大和最适宜种植区。根据赤水市气候资源特点及金钗石斛适宜生长环境指标,选取了年平均气温、全年≥10℃活动积温、海拔高度、月平均气温≥25.0℃月数、分蘖开花期(3-5月)空气相对湿度等5个气象因子作为种植区划指标,在综合考虑经度、纬度和海拔高度对气候资源影响的基础上,利用遵义市12个气象站1971-2000年气候资料和台站信息,采用逐步回归法分别构建了4个区划因子的细网格推算模型。基于数字高程(DEM)数据推算了分辨率为1 km的赤水市气候资源数据集。利用赋值法对5个区划指标分别计算,按照适宜种植区、次适宜种植区和不适宜种植区3个等级完成了赤水市金钗石斛种植气候区划。区划结果显示,赤水市金钗石斛的适宜种植区随地形和海拔高度而变化,主要分布在沿赤水河两岸和沿习水河两岸的沟谷或山地。次适宜和不适宜区主要分布在海拔700 m以上的半高山地区,冬季气温偏低、热量供应不足和夏秋干旱是这些区域不适宜种植的主要原因。
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| 关 键 词： | 赤水市 金钗石斛 气候资源 适应生长指标 区划指标 气候区划 |
Agricultural Climate Regionalization of Dendrobium Nobile Based on GIS in Chishui City |
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| Luo Tianhu.Agricultural Climate Regionalization of Dendrobium Nobile Based on GIS in Chishui City[J].Meteorology Journal of Henan,2014(2):70-73. |
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| Authors: | Luo Tianhu |
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| Institution: | Luo Tianhu (Suiyang Weather Station, Suiyang 563300, China) |
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| Abstract: | Dendrobium nobile is tropical and subtropical plant, so it＇ s easy to grow in warm and humid climate. Chishui city is the largest and the most suitable planting zone for dendrobium nobile in China at present. According to the relationship between the growth of dendrobium nobile and the meteorological conditions in Chishui, the agricultural climatic regionalization indexes and different grades were studied and defined. Five climate elements were selected as indexes of regional planning, which were mean annual temperature （ ℃ ）, annual accumulated temperature （≥10 ℃ ）, altitude of planting area, the number of months which mean monthly temperature ≥ 25.0℃ and relative humidity of tillering to flowing stage （March to May）. Based on the effects of longitude, latitude and altitude on climate resources, and using the climatic data and station information of 12 meteorological observing stations in Zunyi from 1971 to ：2000, four climate elements in grids were established by using the stepwise regression method. The main agroclimate resource values of 1 km resolution ratio in this region were calculated by introducing DEM data. Dendrobium nobile suitable planning area in Chishui city was divided to three regions by using assignment method of five regionalization index, which were suitable zone, sub-suitable zone and unsuita- ble zone. The result showed that the suitable zone mainly distributed over both sides of the Chishui river and Xishui river, which changes with the topography and altitude. Sub-suitable zone and unsuitable zone mainly distributed over the mountains region which altitude was 700 meters above. Low winter temperature, poor total quantity of heat conditions and drought in summer and autumn were the main unsuitable elements for dendrobium nobile planting. |
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| Keywords: | Chishui city dendrobium nobile climate resources adaptation growth index regionalization index climate regionalization |
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