The potential productivities of photosynthesis , the potential productivities of the light and temperature , the potential productivities of the light , temperature and water in the state of nature , the potential productivities of the light , temperature , water and soil in the state of nature , the potential productivities of soil regulated by irrigation of the main crops were analysed and calculated 摘要本文针对阿拉尔垦区主要农作物的光合生产潜力、光温生产潜力、天然状态下光温水生产潜力、光温水土生产潜力及灌溉保证下的土壤生产潜力进行了计算和分析。
95 % of water - used by agriculture come from groundwater , and it occupied 80 % of total water consumption ( 2001 ) . water shortage is becoming the major obstacle of sustainable agricultural development and the key is raise efficiency of wateruse . the results of wofost model simulation showed that the yield of winter wheat was 2323 kg / hm2 under the rainfeed conditions , 5946kg / hm2 with irrigation , while the potential yield is 8485kg / hm2 with the abundance supply of light , temperature , water and fertilizer ( 2 )顺义区农业用水的95来自地下水，农业用水占总用水量的80左右( 2001年) ，水资源紧缺成为限制农业生产的主要瓶颈，在日趋紧缺的水资源压力下，提高水分使用效率成为土地可持续利用的关键。采用wofost模型对顺义区冬小麦的生产潜力及雨养条件下水分限制产量进行了模拟，结果表明：在光、温、水、肥条件均满足时生产潜力为8485kg hm ~ 2 ，雨养条件下水分限制产量只有2323kg hm ~ 2 。
It is surveyed that in this region the light production potentiality is 22290 kg / hm2 , the thermal production potentiality is 14536 kg / hm2 , the climate production potentiality is 5510 kg / hm2 and the soil production potentiality is 1774 kg / hm2 , water and soil are limiting factors 陕北农牧交错带作物光合生产潜力、光温生产潜力、气候生产潜力和土壤生产潜力分别为22290kg hm ~ 2 、 14536kg hm ~ 2 、 5510kg hm ~ 2和1774kg hm ~ 2 ，降水和土壤肥力是作物生长的主要限制因子。
