Study On Grain Production And Nutrient Resource Characteristic Of Shandong Province

According to the farmer investigation,soil testing analyzing and statistic data,we analyze the development of wheat and maize,fertilizer consume consumption,the soil nutrient variety and the balance of nutrient resource in Shandong.The main results are as follows:1.The fertilizer on wheat and maize increases year by year from 1949,which can be described using the fuction ,which correlation coefficient is most remarkable.From the proportion of the three elements,we can see the proportion of nitrogen and phosphorous increases step by step,but potassium envidently decreases.In the agriculture,the nitrogen and phosphorous the crop need are main supplied by chemical fertilizer.2.The farmers mainly use the compound fertilizer,(NH4)2HPO4 and carbamide as the wheat basic fertilizer,but part of farmers use Ca(H2PO4)2-H2O,NH4NO3 and mixed soil fertilizer. The farmers mainly use the compound fertilizer,(NH4)2HPO4 and carbamide as the maize basic fertilizer,but less use organic fertilizer. The nitrogen,phosphor and Potassium fertilizer average application is 247.6kg.hm-2,131.5kg.hm-2 and 72.1kg.hm-2 on wheat and 233.6kg.hm-2,77.2 kg.hm-2 and 57.8 kg.hm-2 on maize.3.On the condition of conventional comsuption of nitrogen,the nitrogen partial factor productivity linearly increases with the grain yield in unit area,but decreases with the comsuption of nitrogen in unit area.The relativity on comsuption of nitrogen is better than grain yield. According to the research of the wheat-maize system nutrient balance,we can see that nitrogen is surplus 77.15×104t,phosphor is surplus 53.51×104t and Potassium is wane 86.98×104t.4.The nitrogen was deficiency from 1972,which is surplus from 1982. The phosphorous was deficiency from 1962, which is surplus from 1972 and the surplus amount increases every year. The potassium was deficiency from 1972.5.According to the manufacture and consumption of chemical fertilizer in 2005,we can see that nitrogen fertilizer is surplus 276.82×104t,phosphorous is deficient 35.35×104t and Potassium fertilizer is deficient 24.01×104t .6.According to the testing of the main cropland in Shandong ,we can see that the total phosphor and available phosphor remarkably increase ,the total nitrogen,organic matter and available Potassium also increase.Compared with the second soil investigation,the soil nutrient increases in differtent degree,which variety from 18.98% to 296.00%.7.The content of the humus belongs to the less moderate level. The contents of the humus,HAand FA in 0~20 cm are higher than the 20~40cm.The soil which has higher organic matter,the content of FA is also higher.In different agrotype,the component of soil humus is different.In the higher yield condition,the contents of the humus,HAand FA are higher than the moderate and lower yield.