吉林农业大学学报2024，Vol.46Issue(5)：809-818,10.DOI:10.13327/j.jjlau.2020.5933
氮肥添加对不同酸度黑钙土氮素转化及酸度变化的影响
Effects of Nitrogen Fertilizer Addition on Nitrogen Conversion and Acidity Changes of Chernozem Soil with Different Acidity Levels
摘要
Abstract
Taking chernozem with pH values of 5.38,6.54,7.16 and 8.11(pH 5,6,7,8)as the re-search object,indoor constant temperature cultivation was conducted for 89 d(sampling at 0,1,4,7,14,21,28,42 and 89 days)to study the effects of adding nitrogen fertilizer(urea,diammonium phos-phate)on nitrogen conversion and acidity of chernozem.The results showed that ammonium nitrogen content,nitrate nitrogen content,nitrification rate and mineralization rate in chernozem with different acidity under urea treatment were 5.77-6.57 times,2.00-2.88 times,3.41-9.20 times and 4.93-8.71 times respectively of the control treatment.Ammonium nitrogen content,nitrate nitrogen content,ni-trification rate and mineralization rate of chernozem with different acidity under diammonium phos-phate treatment were 7.92-8.81 times,1.99-2.78 times,2.84-9.02 times and 2.13-7.09 times re-spectively of the control treatment.The results indicated that the addition of urea is more favorable to the increase of nitrate nitrogen content,nitrification rate and mineralization rate,and the addition of diammonium phosphate is more favorable to the increase of ammonium nitrogen content in cherno-zem.At the end of cultivation,the pH values of the four chernozems under the conditions of urea and diammonium phosphate decreased by 0.72,0.53,0.94,0.44 and 0.89,0.58,1.18,0.54 units,respec-tively,compared with the control treatment,indicating that the application of nitrogen fertilizer sig-nificantly reduces the pH value of chernozem.After the application of two nitrogen fertilizers,the or-der of ammonium nitrogen content in chernozem with different acidity was pH5>pH6≥pH7>pH8,the order of nitrate nitrogen content was pH8>pH5>pH7≥pH6,the order of nitrification rate was pH8>pH7>pH5>pH6,and the order of mineralization rate was pH8>pH5>pH7≥pH6,indicating that the lower the pH value of chernozem,the higher the increase of ammonium nitrogen concentration in the soil,and the nitrate nitrogen content of acidic and alkaline chernozem is higher than that of neutral chernozem.The closer the chernozem is to neutrality,the lower the nitrification and mineralization rate.In a word,the addition of nitrogen fertilizer increased ammonium nitrogen content,nitrate nitro-gen content,nitrification rate and mineralization rate,but it also accelerated soil acidification.关键词
黑钙土/氮肥/铵态氮/硝态氮/pH/硝化速率/矿化速率Key words
chernozem/nitrogen fertilizer/ammonium nitrogen/nitrate nitrogen/pH/nitrifica-tion rate/mineralization rate分类
农业科技引用本文复制引用
李宜联,郭媛,郭策,贺秀娟,赵兴敏,王鸿斌,隋标..氮肥添加对不同酸度黑钙土氮素转化及酸度变化的影响[J].吉林农业大学学报,2024,46(5):809-818,10.基金项目
国家重点研发计划项目(2018YFD0300201),吉林省重大科技专项(20200503004SF) （2018YFD0300201）
