Research On Nutrient Evolution In BoZhou Tillage

Based on farmland sampling analysis of nine countries in Bozhou,this paper studies the content and distribution traits of the soil Organic matter and whole Nitrogen,rapidly available Phosphorus and rapidly available Potassium systematically;and analysis the nutrients change characteristic combined with accumulated data;Meanwhile this paper investigates the local soil types, planating structure and fertilization characteristics to research its impact on soil nutrients.The results indicated:1,The mean value of organic matter content of nine countries in Bozhou City is 15.8g/kg,fourth on rating standards according to nation soil nutrient rating standards;meanvalue of whole Nitrogen and rapidly available Phosphorus Content is 1.13g/kg and 13.72 mg/kg,third on rating standards;while rapidly available Potassium meanvalue comes to 193 mg/kg,in first-degree standard is about 39.67%.Farmland soil nutrient about organic matter and whole Nitrogen,rapidly available phosphoric and rapidly available Potassium of each county is different obviously.2,Compared with the 80's,Organic matter,whole Nitrogen,rapidly available phosphoric and rapidly available Potassium in 2006 are all obviously rised.The organic matter meanvalue rised from 12.0g/kg to 15.dg/kg,rised about 31.67 percent.And the whole Nitrogen meanvalue rised from 0.82g/kg to 1.13g/kg,rised about 7.89 percent.Among nutrient,the rapidly available Phosphorus content rised most quickly,from 5.00 mg/kg to 13.71 mg/kg,rised about 174.40 percent.Rapidly available Potassium meanvalue rised from 185mg/kg to 193g/kg,rised only about 4.32 percent.3,Nutrient of each county distributes asymmetry.The content of whole Nitrogen mean value rare from 1.01g/kg to 1.36g/kg,rapidly available Phosphorus mean value rare from 11.69mg/kg to 19.20mg/kg,and rapidly available Potassium mean value rare from 169mg/kg to 238 mg/kg.4,Organic matter and soil whole Nitrogen,rapidly available phosphoric and rapidly available Potassium relate obviously.On SAS software related analysis about the sampled measurement results of 2006,its influences are all very obvious between organic and soil whole Nitrogen,rapidly available phosphoric and rapidly available Potassium(＜0.0001).we get regression equation of soil organic matter(x)and whole Nitrogen(y)is: y=0.52626+0.036949x,with rapidly available Phosphorus(y)is: y=1.24821+0.766068x,with the rapidly available Potassium(y)is: y=72.79525+7.564423x.5,In rotation,the soil Organic matter,whole Nitrogen and rapidly available Potassium is higher than single farm crop.Rotation soil is high about 10%on Organic matter and rapidly available Potassium,and 38%on whole Nitrogen.But the soil of single farm crop has more rapidly available Phosphorus than rotation soil.In different rotation,the soil content of organic matter,rapidly available Phosphorus and rapidly available Potassiums under wheat-cotton or wheat-corn is lower than under wheat-soybean,but whole Nitrogen is higher.6,The content of Organic matter,whole Nitrogen,rapidly available Phosphorus and rapidly available Potassiums are changed with soil type.As to Indicotic Black Soil,its organic matter mean value is 17.1g/kg,whole Nitrogen mean value is 1.10g/kg,rapidly available Phosphorus mean value is 12.84g/kg,and rapidly available Potassium mean value is 197mg/kg;while Fluvo-aquic Soil,its organic matter mean value is 15.3g/kg,whole Nitrogen mean value is 1.19g/kg,rapidly available Phosphorus mean value 15.19g/kg,and rapidly available Potassium mean value is 188mg/kg.