Study On Microelement Content And Spatial Distribution In Grain Main Production Area Of Hebei Province

2015,In the context of the Ministry of Agriculture’s Zero Growth in Fertilizer Use by 2020,The present situation and existing problems of fertilizer utilization in China are pointed out,It is necessary to improve fertilizer utilization rate and put forward the goal of zero fertilizer increase.At present,the varieties of fertilizer in China are mainly nitrogen,phosphorus and potassium,Less understanding of trace elements,The application of light and medium fertilizer.Study on the abundance and spatial distribution of the effective content of trace elements in soil,It is beneficial to correctly judge the supply level of the effective content of medium and trace elements,In order to provide scientific basis for balanced fertilization,To ensure a smooth increase in grain production in the main grain production areas of Hebei Province.Therefore,In this paper,80 counties in the main grain producing areas of Hebei Province(pre-hill plain,northeast Heilongjiang port plain,south central Heilongjiang port plain,Yanshan foothills plain)are studied,To collect～obtain the cumulative median elements sulfur(S),silicon(Si),trace elements copper(Cu),zinc(Zn),iron(Fe),manganese(Mn),boron(B)and molybdenum(Mo)active state content data,Using SPSS、geostatistical analysis methods(GS)and ArcGIS techniques to analyze the relevant data,The grade evaluation and spatial distribution characteristics of the effective state content of medium and trace elements were determined.The main findings and conclusions are as follows:(1)The effective state content of trace elements in main grain producing area of Hebei Province.Among the main grain producing areas of Hebei Province,the coefficient of variation of available sulfur and trace elements of available copper,zinc,iron,manganese and molybdenum were between 68.18%～96%,and the coefficient of variation of available silicon and trace elements of available boron was 122.23%and 111.17%,respectively.Overall,the effective sulfur content is 55.89%,the effective silicon content is 87.37%,the effective copper content is 92.83%,the effective zinc content is 71.48%,the effective iron content is 53.45%,the effective manganese content is 69.02%,the effective boron content is 64.28%,and the effective molybdenum content is 88.33%.(2)Spatial distribution characteristics of trace elements in soil in main grain producing areas of Hebei province.By using ArcGIS technique,the vector map of main grain producing area of Hebei Province is combined with the data of effective state content of 8 kinds of medium and trace elements in soil,and the spatial distribution map of effective state content of 8 kinds of medium and trace elements is obtained according to the ordinary Kriging interpolation method.The distribution of effective sulfur content is patchy and has no obvious distribution rule;the effective silicon shows the trend of high content in northeast and southwest,low content in central part;the overall content of effective copper is high and uniform,and there is no obvious change characteristic;the effective zinc content is increasing from east to west;the effective iron content is lacking except for the high content of Yanshan plain;The distribution of effective manganese content is similar to that of effective zinc content,which increases gradually from east to west,the content of effective boron increases gradually from south to north,and the overall content of effective molybdenum is rich and uniform,and there is no obvious change characteristic.Area distribution among them,The content of available sulfur,silicon,zinc,manganese and boron is the most extensive,The area is 17616.50、16758.78、31942.02、24186.40and 26941.26 km2,respectively The proportion of area is 29.56%,28.13%,53.61%,40.59%and 45.21%respectively,The effective copper and effective molybdenum contents are the most extensive in terms of high and extremely high levels,respectively,The area reached 39887.87 km2 and 38461.53 km2 respectively,the proportion of area was 66.94%and 64.55%,respectively;Effective iron accounts for the most extensive area at low levels,Area:km2,26605.30 The proportion of area is 44.65.According to the above results,the following conclusions are drawn:The coefficient of variation of the effective state content of trace elements in the main grain producing area of Hebei Province is large,and the overall variability of the data is significant;The spatial distribution of trace elements in the main grain producing areas of Hebei Province is obvious.Therefore,it is necessary to integrate the actual situation of the main grain production areas and adopt the methods of balanced fertilization and scientific fertilization in order to improve soil fertility,increase grain yield and increase farmers’ income,so as to achieve the purpose of promoting the rapid development of agricultural economy in Hebei Province.