论文部分内容阅读
[目的]探究冬季光、温、云的变化对延安日光温室的影响。[方法]利用1956～2006年延安7个站冬季(当年11月至翌年2月)气温、日照时数、云量量别日数和1990～2008年冬季辐射资料,采用统计检验方法,分析其变化特征和对日光温室农业生产的影响。[结果]20世纪90年代初,延安冬季气温和最低气温发生显著突变,进入异常增暖时期。2月气温上升最为显著,11月上升幅度最小。突变后延安最低气温的概率分布发生明显变化,偏冷的概率显著减小,偏暖的概率显著增大。延安冬季日照时数变化比较平缓,辐射量下降,11月和2月辐射量增加,而12月和1月辐射量减少。延安冬季晴天日数明显上升,相反,多云和阴天日数明显下降。低云量的变化比总云量明显。[结论]气候变化有利于日光温室的发展,有利于作物生长发育和产量提高。12月和翌年1月,光环境变差,应采取补光措施,改善生产条件,提高产量和品质,提高经济效益。
[Objective] The research aimed to investigate the effects of winter light, temperature and cloud on the greenhouse of Yan’an solar greenhouse. [Method] Based on the air temperature, sunshine hours, the days of cloudiness and the data of winter months from 1990 to 2008 in winter from 7 stations in Yanan from 1956 to 2006 (from November to February of next year), statistical analysis was used to analyze the changes Characteristics and Effects on Agricultural Production in Solar Greenhouse. [Result] In the early 90s of last century, the temperature and minimum temperature of winter in Yan’an changed significantly and entered the period of abnormal warming. February temperature rose the most significant increase in November the smallest increase. After the mutation, the probability distribution of the lowest temperature in Yan’an obviously changed, the probability of partial cold decreased significantly and the probability of partial warming significantly increased. The change of winter sunshine hours in Yan’an is relatively flat and the radiation is decreased. The radiation in November and February increases, while the radiation in December and January decreases. The number of sunny days in winter in Yan’an increased significantly. On the contrary, the days of cloudy and cloudy days decreased significantly. The change of low cloud amount is more obvious than the total amount of cloud cover. [Conclusion] Climate change is beneficial to the development of solar greenhouse, which is beneficial to the growth and yield of crops. December and January of the following year, the light environment worsened, should take fill light measures to improve production conditions, improve yield and quality, improve economic efficiency.