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[1]WANG Jia,CHEN Wei,ZHANG Qiang,et al.Effects of Low Nitrogen Stress on Soil Nitrogen Converting Enzyme Activities Under Different Kinds of Tartary Buckwheat[J].Research of Soil and Water Conservation,2021,28(05):47-53.

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Effects of Low Nitrogen Stress on Soil Nitrogen Converting Enzyme Activities Under Different Kinds of Tartary Buckwheat

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 05 Page number: 47-53 Column: Public date: 2021-08-20

Title:: Effects of Low Nitrogen Stress on Soil Nitrogen Converting Enzyme Activities Under Different Kinds of Tartary Buckwheat

Author(s):: WANG Jia^1,3,CHEN Wei^1,3,ZHANG Qiang²,WANG Hongyang^1,3,LI Yaxin^1,3; (1.College of Geographical Science,Shanxi Normal University,Linfen,Shanxi 041004,China; 2.College of Life Science,Shanxi Normal University,Linfen,Shanxi 041004,China; 3.Academician's Workstation for Information Management of Resources and Environment in Shanxi Province,Linfen,Shanxi 041004,China)

Keywords:: low nitrogen stress; nitrogen invertase activities; Tartary Buckwheat with different tolerance

CLC:: S154.2

DOI:: -

Abstract:: In order to study the effect of low nitrogen stress on the soil nitrogen invertase activities of different kinds of barren-tolerant buckwheat,Diqing tartary buckwheat(DQ,low nitrogen-tolerant cultivar)and ‘Heifeng 1'(HF,low nitrogen-tolerant cultivar)were used as research subjects,three levels of nitrogen application: control(CK,urea 0 mg/kg),low nitrogen(N₁,urea 80 mg/kg),normal nitrogen application(N₂,urea 160 mg/kg)werer set,soil water and fertilizer status and nitrogen conversion related enzyme activities of different barren-tolerant buckwheat cultivars were analyzed. The results show that low nitrogen stress has the significant effect on the soil water and fertilizer status of soil planted to tartary buckwheat(p<0.05). Under low nitrogen stress,the soil water content,pH,total nitrogen,total phosphorus,NO^-₃-N and yield of DQ are higher than those of HF. Low nitrogen stress also has a significant effect on the enzyme activities related to nitrogen conversion in soil planted to tartary buckwheat(p<0.05). Under low nitrogen stress,the activities of ammonia oxidase and protease of HF are 37.61% and 253.27% higher than those of DQ. At the same time,redundant analysis shows that cultivars(p=0.002),soil water content(p=0.002),NO^-₃-N(p=0.012),total potassium(p=0.016)affect soil the most important environmental factor for key enzyme activities in the nitrogen conversion process. In summary,compared with HF,DQ has higher water and fertilizer retention and yield,but has lower soil enzyme activities because selective way of absorption nitrogen of the form of NO^-₃-N and NH⁺₄-N affects the soil pH and controls the soil enzyme activities for the nitrogen usability and the selected characters cultivar and moisture had the greatest effect on soil nitrogen invertase activities. Therefore,it is recommended to select buckwheat cultivars with strong barren tolerance in the limited soil nutrient areas of the Loess Plateau. These results can provide theoretical basis and practical reference for agricultural development in the poor soil nutrient areas of the Loess Plateau.

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Last Update: 2021-08-20