Relation Between Iron Nutrition Status And Soil Environment Of Main Peanut Production Area In Western Part Of Jilin Province

Iron is one of the important elements in the soil constitution. It has significance impact onthe growth of the crop. The research indicates that iron deficiency in the plant has alreadybecome an obvious environment problem and social problem in China. The iron content ofvarious forms in the soil is as follows from high to low: ferro-manganese bounded form>organic matter bounded form> carbonate bounded form> adsorbed form> water-soluble form.This paper takes the soil of the peanut vegetation block in the western part of Jilin Province asthe research object， analyzes the change trend of the iron with different forms in the soil layer，studies the iron form that has the closest relation with the iron content in the peanut， anddiscusses the relation between iron with different forms and the soil environment， so as toimprove the soil environment and provide theory basis for improving the crop output. The mainresearch result is as follows:1. The iron with different forms changes with the deepening of the soil layer. All of the ironforms present the decreasing trend. The content of the absorbed-form iron shows the greatestreduction，which is reduced by24%at15-30cm of the soil layer and13%at>30cm; the secondone is the water-soluble form， which is reduced by16%at15-30cm of the soil layer， and7%at>30cm; other three forms are reduced by0.06%at15-30cm and0.02%at>30cm.2. The iron with different forms in the soil has great impact on the iron content of thepeanut. Through the analysis， it turns out that the iron with ferro-manganese bounded form hasthe closest relation with the iron content in the peanut， followed by the carbonate boundedform and adsorbed form， all of which gets extremely significant relevance. The water-solubleform and organic matter bounded form has little influence in the peanut. At0-15cm of the soillayer，the iron of various forms has the greatest relation with the iron content in the peanut. Therelevance between the other two soil layers and iron content in the peanut reduces gradually.3. The iron with different forms has close relation with the soil environment. Through theanalysis， it turns out that the relation between PH and iron with different forms in the soilpresents negative correlation. The content of the iron with various forms decreases while PHincreases. It shows obvious negative correlation with the ferro-manganese bounded form，carbonate bounded form and absorbed form， while the correlation towards the water-solubleform and organic matter bounded form does not reach the obvious effect; the organic matter hasinfluence in the iron with carbonate bounded form and ferro-manganese bounded form of thesoil; the soil carbonate has great influence in the ferro-manganese bounded form and adsorbedform; the phosphorus and ferro-manganese oxidation form in the soil have influence with each other.4. There is great difference in the iron with different forms. The average content of the ironwith different forms rises from the middle part to the western part in the peanut vegetation ofWestern Jilin. Through comparison on the soil between Baicheng District and SongyuanDistrict， the content of the iron with different forms is relatively high， and the content changerange is also great.