Effects Of New Urea On Nitrogen Absorption And Utilization,Yield And Quality Of Corn

In recent years,the problem of excessive application of nitrogen fertilizer in agricultural planting in China not only causes waste of fertilizer resources,but also easily causes environmental pollution,which is not conducive to ecological security in rural areas and sustainable development of agriculture.Corn is a crop with a large demand for nitrogen fertilizer.Inner Mongolia is one of the main producing areas of corn in China.By applying nitrogen fertilizer with slow and controlled release properties,it can solve the problem of excessive application of nitrogen fertilizer in corn production,reduce nitrogen fertilizer waste and reduce environmental pollution.In this experiment,5 kinds of Ju-Neng-Wang urea and 5 kinds of humic acid urea were used to study their effects on the nitrogen uptake,utilization,yield and quality of maize,which is compared with common urea.It will provide a theoretical basis for rational selection of suitable nitrogen fertilizer varieties,improvement of nitrogen fertilizer utilization rate and production efficiency in corn production.The main results are as follows:1.Ju-Neng-Wang urea and humic acid urea increased the corn's accumulation of dry matter and nitrogen during the whole growth period and promoted the transfer and distribution of them to product organs.Compared with common urea,among the Ju-Neng-Wang urea treatments,the corn's dry matter accumulation of typel,II,IV had a bigger increase,and typellsignificantly increased by 12.05%;the nitrogen accumulation of typeII,IV,Vsignificantly increasedby 30.71%,25.09%,20.60%;the dry matter distribution in corn's ear of type II,IV increased significantly,the nitrogen distribution in ear of theirs had a bigger increas.Among the humic acid urea treatments,the corn's dry matter and nitrogen accumulation of type IV,V had a increase,the dry matter and nitrogen distribution in ear increased significantly,the dry matter accumulation increased by 13.50%,11.04%and the nitrogen accumulation increased by 28.46%,31.46%,significantly.As the application of type III Ju-Neng-Wang urea reduced,the dry matter and nitrogen accumulation of corn decreasd,which is also lower than common urea's;As the application of type III humic acid urea reduced,the dry matter,nitrogen accumulation increased and higher than common urea's,the nitrogen accumulation which increased significantly.2.Ju-Neng-Wang urea and humic acid urea improved the corn's yield composition factors and increased the yield.Compared with common urea,among the Ju-Neng-Wang urea treatments,the corn's grain number per spike of typel,II,IV,Vhad a bigger increase;the hundred grain weight of type?,?,Valso had a bigger increase;the yield of type?,?,Vincreased byl4.21%,12.71%and 12.54%.Among the humic acid urea treatments,the corn's grain number per spike of type Vincreased significantly;the hundred grain weight of type IV,Vhad a bigger increase which achieves significant level,and the yield of theirs increased by 13.35%,21.00%respectively.As the application of type ? Ju-Neng-Wang urea reduced,the corn's yield had no significant decrease,which is also lower than common urea's,but not obviously;As the application of type ? humic acid urea reduced,the corn's yield increased,which is higher than common urea's,too.3.Ju-Neng-Wang urea and humic acid urea improve the utilization efficiency of nitrogen fertilizer in maize.Among Ju-Neng-Wang urea treatments,the utilization rate of nitrogen fertilizer of type?,?,Vhad a bigger increase than common urea and significantly increased by 16.45,13.56 and 11.04 percentage points respectively;Among humic acid urea treatments,the utilization rate of nitrogen fertilizer of type IV,V significantly increased by 15.27,16.87 percentage points than common urea.As the application of type? Ju-Neng-Wang urea reduced,the utilization rate of nitrogen fertilizer had no obvious change,but higher than common urea's;As the application of type ? humic acid urea reduced,the utilization rate of nitrogen fertilizer increased and which is significantly higher than common urea's.4.Ju-Neng-Wang urea and humic acid urea can reduce the application of nitrogen fertilizer in corn planting.After the application of type ? Ju-Neng-Wang urea reduced,corn's yield had no decrease which is compared with common urea;After the application of type ? humic acid urea reduced,corn's yield is still better than common urea.5.The results of various tests in this experiment show that,the ?,? and ? types of Ju-Neng-Wang urea and the ? and ? types of humic acid urea have a good effect of increasing yield,higher fertilizer utilization efficiency,net income than common urea,of which can be promoted in corn production.