| In this study,Fujian province was selected as a case study area,cultivated land productivity investigation(the year of 2009 of Fujian province),fertilizer recommendation based on soil testing and field experiments of fertilizer efficiencies,etc.were used to analysis the abundant and deficient of Fujian province cultivated land nitrogen(N),phosphorus(P)and potassium(K)and the main crops optimization azophoska fertilizer demand of cultivated land in Fujian Province were calculated by means of the software of Farmland Soil Testing Formula Fertilization Information System from Ministry of Agriculture by the method of nutrients abundance and deficiency index method.By comparing with the actual consumption of azophoska fertilizer,the fertilizer resources optimization configuration solutions and countermeasures were proposed to scientific apply fertilizer and reasonable allocate the fertilizer resources.The results showed that:1.The mean of cultivated land available N content of Fujian province was 134.47 mg/kg,generally in the medium level,the trend of spatial distribution was the lack level of available N distributed in northwest,mountains reigon and the rich level distributed in the southeast,coastal reigon.The mean of cultivated land available P content was 29.56 mg/kg,generally in the rich level,the trend of spatial distribution was the lack level of available P distributed in northwest,mountains reigon and the rich level distributed in the southwest,south reigon.The mean of cultivated land available K content of Fujian province was 76.52 mg/kg,generally in the lack level overall,the trend of spatial distribution was the lack level of available K distributed in all parts of the province and the rich level of available K distributed in Zhangzhou,Putian,Quanzhou,etc.2.The content of cultivated land available N in medium level accounted for 73.49%of the total area of the cultivated land in Fujian;the content of cultivated land available N in the rich and low level were accounting for 7.41%and 19.09%of the total area of cultivated land in Fujian,respectively.The content of cultivated land available P in rich level accounted for 55.43%of the total area of the cultivated land in Fujian;the content of cultivated land available P in the medium and low level were accounting for 32.14%and 12.43%of the total area of cultivated land in Fujian,respectively.The content of cultivated land available K in lack level accounted for 62.73%of the total area of the cultivated land in Fujian;the content of cultivated land available K in the rich and medium level were accounting for 9.56%and 27.71%of the total area of cultivated land in Fujian,respectively.3.The content of cultivated land available N in Fujian was given priority to with lack level in Xiamen,other citys were given priority to with medium level;the content of cultivated land available P in Fujian was given priority to with medium level in Nanping and Ningde,other citys were given priority to with rich level;the content of cultivated land available K in Fujian was given priority to with lack level in all cities of the whole province.The area of dry land and irrigable land were larger in lack level of cultivated land available N,paddy field was larger in medium level;the area of cultivated land available P in rich level was all larger in dry land,paddy field and irrigable land;the area of cultivated land available K in lack level were all larger in dry land,paddy field and irrigable land.Coastal solonchaks,latosolic red soils and cultivated aeolian soils available N content of cultivated land area in lack level were larger;red soils,yellow soils,paddy soils and purplish soils available N content of cultivated land area in medium level were larger;the cultivated land area of available N didn't appear to be much different in fluvo-aquic soils.Fluvo-Aquic Soils,latosolic red soils,cultivated aeolian soils,red soils,yellow soils,paddy soils and purplish soils available P content of cultivated land area in rich level were larger;coastal solonchaks available P content of cultivated land area in lack level were larger.The cultivated land area of available K were larger in lack level of all the soil group.4.The calculation results of main crop chemical fertilizer demand in Fujian based on the technology in balance fertilization showed that:the demand of N fertilizer were bigger in Nanping,Sanming,Longyan and Fuzhou,and was smaller in Xiamen;the demand of P fertilizer were bigger in Nanping,Sanming,Quanzhou and Fuzhou,and were smaller in Putian and Xiamen;the demand of K fertilizer were bigger in Nanping,Sanming,Fuzhou and Longyan,and were smaller in Xiamen and Putian.5?According to the calculation of the actual consumption and the optimum demand of main crop azophoska fertilizer,the actual consumption of main crop chemical fertilizer in Fujian was 662.1 thousand tons,the optimum demand of main crop chemical fertilizer was 660.2 thousand tons,Fujian province can reduce fertilizer resources market supply 1862 t.According to the distribution of azophoska fertilizer production enterprises in Fujian province and the fertilizer supply and demand situation,proposed fertilizer resources optimal allocation scheme in Fujian province were as follows:The suggestion was that set up a provincial fertilizer resources dispatching center and set up municipal fertilizer resources dispatching centers.It can reduce nitrogen fertilizer resources market supply 53.2 thousand tons;phosphatic fertilizer resources market supply 69.1 thousand tons;potassium fertilizer resources market supply 120.6 thousand tons in Fujian province.On fertilizer utilization and demand situation in Fujian province,from the aspects of enterprise and technology put forward the corresponding countermeasure,to ensure the chemical fertilizer resource optimal allocation. |
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