Study The Effects Of Soil Conditioner On Soil, The Flue-tobacco And Paddy Of The Cadmium Polluted Soil

Research into soil conditioner's influence on cadmium content in soil, soil nutrition constituents and physical and chemical characteristics, and tobacco leaf cadmium content, agricultural property, tobacco leaf physical traits, chemical traits, economic property, unhusked rice cadmium content and rice production volume, the main results are as follows:Soil cadmium content in bioavailable form appears to decrease with increase of soil conditioner application volume, soil pH value increases with increase in soil conditioner application volume, obvious changes do not occur on the whole in soil alkali-hydrolyzable nitrogen content, available phosphorus content, organic material content, cation exchange capacity, soil quick- acting potassiumcontent appears to have the tendency of decreasing firstly and then increasing after the application of soil conditioner, but each processed quick-acting potassium content is lower than comparison. The cadmium content in tobacco leaf decreases with elevation of position on the leaf, in comparison with contrast, cadmium content in all processed parts tobacco leaf obviously decreases with increase in soil conditioner application volume.Main agricultural property index:grass height, leaf length, leaf width, blade number in each processed large field are all higher than contrast, and grass height, leaf length, leaf width of tobacco firstly increase then decrease with increase in the application volume of soil conditioner, but all of them are higher than contrast, blade thickness increases with increase in application volume of soil conditioner, showing that soil conditioner has a relatively good boosting effect on tobacco growth.The flue-cured tobacco leaves physical properties are each processed part of tobacco leaf length is slightly higher than the contrast, leaf weight and blade thickness is obviously higher than then contrast, and increase with soil conditioner application volume, each processed leaf stalk rate is not obviously different from the contrast.Each processed leafs chemical composition:the total sugar content of each part appears to be well. and the difference with contrast is not distinct; reducing sugar content and nicotine are obviously higher than contrast, and are all within appropriate scope; soil conditioner has a smaller influence on each processed tobacco leaf starch, total nitrogen and chlorine content, and it doesn't differ obviously with the contrast.The output value, output volume, middle-class tobacco proportion and average price are all the highest when the soil conditioner application volume is 7500kg/hm~2, the first-class tobacco proportion is highest when the soil conditioner application volume is 3750kg/hm~2.The application of soil conditioner can obviously reduce cadmium content in rotate unhusked rice, and production increase effect is obvious.