Ningxia NKWS-III Solar Greenhouse Design-building and Temperature and Light Environmental Characteristics in Winter

In order to optimize structure design and promote maximization development of solar greenhouse,the Ningxia NKWS-Ⅲ solar greenhouse was designed,built and tested under rare low temperature condition in 2008 winter.The results showed that NKWS-Ⅲ solar greenhouse had feature of high transmittance and big volume which was helpful to administration of infinite growth-type vegetable under long seasonal cultivation.In the general weather conditions,this type solar greenhouse can basic ensure eggplant vegetable to get through winter.But it needed to taking well insulation measures and adding warming equipment when encountered limit low temperature condition.The results of statistical analysis indicated that could seen as outside environment critical exponent for warming of Ningxia NKWS-Ⅲ solar greenhouse when the daily total radiation was 7.82 JM/m2、the lowest temperature was-14.66℃、daily average temperature was-8.79℃.