There are some systematic biases in prediction of solar radiation based on numerical models, the AVT method has been verified to reduce the prediction bias effectively. The AVT correction method was used to modify the forecasted solar radiation in two photovoltaic power plants in Hexi area of Gansu Province. The results state: (1) Before correction the forecast bias presented obviously diurnal variation with increase first and then decrease, while it wasn’t obvious after correction. There was a strong linear relationship between forecast deviation of solar radiation and observed values before correction, while it got weak after correction (the correlation coefficient and good fitting degree decreased). (2) There was obviously annual change characteristic of solar radiation with the highest forecast bias in spring, followed by summer, autumn and winter. After correction, its forecast bias was reduced in four seasons, especially in spring and summer.

Based on daily meteorological data of 10 national meteorological stations in mountainous area of central and southern Ningxia from 1981 to 2018, the calculation model of comprehensive suitability for potato in mountainous area of central and southern Ningxia was established by integrating the indexes such as temperature, sunshine and water suitability, and characteristics of temporal and spatial variation of temperature suitability （PT）, sunshine suitability （PS）, water suitability （PW）, comprehensive suitability （P） were analyzed emphatically. The results show that the thermal and sunshine resources were suitable in mountainous area of central and southern Ningxia, which could meet the needs of potato’s growth in different growth stages. Among them, water was the main limiting factor affecting the growth stages of potato, and the annual fluctuation of water suitability was the largest. The variation coefficient of the comprehensive suitability from the branching stage to the flowering stage was the largest, which was the most unstable period when the climatic conditions affected the growth and development of potato. From the perspective of spatial variation, the comprehensive suitability of the whole growth period of potato showed an increasing trend from northeast to southwest, and the most suitable areas were in Xiji county, most areas of Haiyuan county and Yuanzhou district, western of Pengyang county, the most areas of Longde county and Jingyuan county except the higher elevation ridge of the Liupan Mountain, which had the unique climatic advantages suitable for potato production.

Based on the natural environmental characteristics of Gannan Tibetan Autonomous Prefecture and Construction features of the highway G213，the influence of the highway Construction on the grassland eco一environment there is analyzed in this paper. Results show that the negative influence on vegetation during Construc;tion periods is severe. The soil environment is disturbed greatly in Certain areas rainfall erosion is the main factor in soil erosion and the loss volume of soil and water is 68 866. 7 t，63 060. 5 t of which is the lncrease. Finally  some   proposal  and   suggested  In  terms  Of  the  probable  environment  problems   In  the construetion.

 According to the investigation of Uahai一Gecha National Nature Reserves，the influence of weather disaster, climate warming and creeping environmental problems on its eco-environment  is analyzed and the corresponding protection arc shown in this paper,  It shows that weather disaster can make vegetation drought climate warming and drying, average annual temperature increased 0. }  C and rainfall 1990一1999，which compared with those during the period of 1960一1979.  As a result rated，part of the grassland degraded，the damage by rats have seriously threatened，
Or endure mechanical damage. mcasrcs With the decreased 87.5 mm during the period of ，the ato cco一environment has hccn dctcrio resources reduced and the biologic diversity has been destroyed.  Creeping environmental problems, such as the construction of the highway U213，has some influ cncc on as cco一cnv}ronmcnt.