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- W2360343082 abstract "In order to investigate the contents and distribution characteristics of the different forms of nitrogen in the winter cornfield soil located in Zhangjiagang city,Jiangsu province,four sub-regions are chosen within the field to conduct profile experiment research.The results show that the contents of ammonia nitrogen in the field have small variation of 5.7mg/kg before and after fertilization,slightly changed and the ammonia nitrogen in the soil vertical distribution is relatively uniform.Ammonia nitrogen in the wheat growing season changes smoothly.Also,fertilization and rainfall have little effect on the ammonia nitrogen vertical migration in the soil because of the positively charged properties of ammonia nitrogen and soil characteristic.The trend of the change is the same and the gaps are little among different fertilizer treatments.The nitrate nitrogen contents in the farmland soil are highly affected by the fertilizing amount,rainfall time and rainfall intensity.The contents will remarkably increase after the fertilizer application and reaches maximum value,which is 42times higher than the contents value before fertilization at the fourth day.88.4%of the nitrate nitrogen mainly distributed in the depth of 0~30cm soil.The diversity of different fertilizer treatments mainly reflects in the depth of 0~50cm soil.Nitrate nitrogen leaching is very serious in 20days after fertilizing and has a certain influence on the ground water.The effect is not the best if the large amount of nitrogen fertilizer is used in one time application to promote the wheat growth,so it will be an useful method that reasonable application of several times in the key period of wheat growth to improve the utilization rate of nitrogen fertilizer." @default.
- W2360343082 created "2016-06-24" @default.
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- W2360343082 date "2013-01-01" @default.
- W2360343082 modified "2023-09-26" @default.
- W2360343082 title "Different Forms of Nitrogen Contents and Distribution Characteristics of Soil at Wheat Growth Season" @default.
- W2360343082 hasPublicationYear "2013" @default.
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