The Influence Of Organic Material On Urea Nitrogen Transformation Factors In The Loam JiLin Province

The nitrogenous fertilizer use increases production the vital significance to our country's grain.Massive experimental and agricultural production's practice indicated that increases production in the crops in many factors,the chemical fertilizer production increase function approximately composes 40%.But along with the chemical fertilizer massive uses,the chemical fertilizer use factor actually in the drop,the soil texture starts to worsen.Statistics indicated that our country ammonium bicarbonate's use factor is only 20%～3.4.And the nitrogen use factor is 30%-40%.The chemical fertilizer massive uses,raised the farmland output effectively,but invests with delivers compared to the rapid drop,at present each kilogram pure nutrient production increase grain has dropped to 6.5 kilograms.The fertilizer nitrogen's loss way mainly has:The ammonia volatility,a nitration denitrification,or has the runoff loss the drip washing to the root level below.The crops straw stalk usual use is uses for to burn down gives off heat,has like this not only lost its value,and has polluted the environment.As the organic material's one kind,it plays to the soil increases the soil ulmin,cultivates the fat soil the role,moreover reduced the chemical fertilizer amount of use,has protected the environment.This article through clarifies the urea list serve and mixes after the organic material executes the urea ammoniacal nitrogen,the nitric nitrogen,urinates the enzyme activity,the true nutritive value,the nitrosation bacterial content,transforms the influence to the nitrogen shape,adopts reasonably in order to for the agricultural production in applies fertilizer the measure and the soil cultivates the fat measure, reduces ammonia element each kind of loss,raises the fertilizer use factor and the environment quality provides the theory basis.After the urea and the smashing corn straw stalk,the paddy rice straw stalk,big beanstalk stalk Shi Rudao in the 500gd soil trough carries on the raise experiment. The urea executes inputs is 0.1696g(150kg/hm~2),the crops straw stalk execute into the level are differently:0.1696g/trough(1500 kg/h m~2),6.7824g/trough(2000 kg/h m~2),.8.478g/trough(2500 kg/h m~2).Separately in 0.3.7.12.30 day of determination soil ammoniacal nitrogen density,nitric nitrogen density,urease activeness,nitrosation bacterial content.Through the determination,1 executes into the crops straw stalk soil the ammoniacal nitrogen density to compare does not execute into the straw stalk's density to be high,and executes increase which along with the straw stalk inputs,the ammoniacal nitrogen density elevates gradually.2 execute into the crops straw stalk soil the nitric nitrogen density to compare does not execute into the crops straw stalk's density to be low.And along with the crops straw stalk increase which executes inputs,the nitric nitrogen density has the tendency which elevates slowly..3 execute into the crops straw stalk soil urease activeness to compare does not execute into straw stalk striving to excel,the order is:Big beanstalk stalk＞corn straw stalk＞paddy rice straw stalk,and executes increase which along with the crops straw stalk inputs,urease activeness is also getting stronger and stronger.4 execute into the crops straw stalk nitrosation bacterial content to compare does not execute into the straw stalk to be many,the order is:Big beanstalk stalk corn straw stalk＞big beanstalk stalk;And executes increase which along with the straw stalk inputs,the soil nitration rate reduces gradually.6 nitric nitrogens and the nitrosation bacterial content's accumulation technical progress factor is 90.893%, therefore only uses the nitric nitrogen and the nitrosation bacterial content two targets analyzes the organic material sufficiently for the urea nitrogen factor conversion process influence.