关中东部设施农业气候资源分布及变化特征

采用陕西关中东部11站1961—2006年的气象资料，运用气候倾向率方法，分析了设施农业气候资源分布状况及其变化特征。结果表明，关中东部设施农业生产季节（当年11月-次年3月），气温总体上呈东南高西北低的区域分布格局，热量资源是增加的趋势；降水资源最丰富的中心在华县和潼关，最少的地方在澄城、合阳、大荔和蒲城，降水量呈减少的趋势；日照资源最丰富的中心在澄城县，相对最少的地方在华县，其变化特征为：整体上南部为减少的趋势，北部为增加的趋势。在设施农业发展布局方面，北部的澄城、合阳光照资源十分丰富，只要解决好保温防冻和灌溉问题，设施农业发展的潜力很大。

Agro-climatic Resource Distribution and Its Change Characteristics for Protected Agriculture in East Guanzhong Areas of Shaanxi Province

Based on the meteorological data of the eleven stations in 1961 - 2006 in the East Guanzhong Areas of Shaanxi Province, the climatic resource distribution and its change characteristics for the protected agriculture were analyzed by using the climatic trends rate methods. The result showed that the temperature during the protected agriculture production season in the East Guanzhong Areas of Shaanxi Province, namely from the November to the March next year, increased from the Northwest to the Southeast. Generally, the heat resource had an increasing trend. The most abundant precipitation areas were in Huaxian and Tongguan counties, while the least precipitation areas were in Chengcheng, Heyang, Dali and Pucheng counties. The precipitation had a decreased trend. The most abundant sunshine areas were in Chengcheng county, while it was relative less in Huaxian. The sunshine increased in the South of the East Guanzhong Areas, while it decreased in the North of the East Guanzhong Areas. For Chengcheng and Heyang counties in the North of the East Guanzhong Areas, with the abundant sunshine resource, there was great potential to develop the protected agriculture, where the key issues were the heat preservation, the frozen injury prevention and the irrigation safeguarding.