The natural precipitation status in Chaoyang District was discussed from aspects of regional distribution,seasonal and annual variation.According to rainfall and evaporation data in recent 50 years from several typical stations in Chaoyang,the drought status was analyzed.The drought in each season of Chaoyang was divided into different types,and by using decomposition principle and the scientific simulation method,the main crops' yield in recent 50 years in 5 counties of Chaoyang and precipitation anomaly from April to September was analyzed to find out the main weather restricting factors.Meanwhile,according to the basic principles of farmland water balance and multi-disciplinary theoretical knowledge,some countermeasures were put forward,such as improving eco-environment,culturing drought resistant varieties and adjusting crop layout,so as to improve the utilization of natural precipitation in Chaoyang District,fully tap the water resources,and fight for the full harvest of agricultural production.
The warming effect of Chaoyang efficient agriculture was analyzed using nearly 60 years of climatic date and 30 years of agricultural material from three aspects including corn cultivation area,facility agriculture in protective field,gross agricultural output value.The results showed that climate warming had a very significant positive effect on the development of high-active agriculture in Chaoyang.
