Regulatory mechanisms of nitrogen and phosphorus transformation and maize growth in soils of the black soil zone: based on field experiments
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1.School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University;2.School of Water Conservancy and Civil Engineering, Northeast Agricultural University

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S156.2

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    Abstract:

    [Objective] To investigate the effects of different tillage patterns and biochar application on soil nitrogen and phosphorus transformation and maize growth and development in farmland in the black soil area. [Methods] In this paper, 10 different treatments were set up through a field experiment: deep tillage + 0t/hm2 biochar (DCK), deep tillage + 3t/hm2 biochar (D3), deep tillage + 6t/hm2 biochar (D6), deep tillage + 9t/hm2 biochar (D9), deep tillage + 12t/hm2 biochar (D12), shallow tillage + 0kg/mu biochar (SCK), shallow tillage + 3t/hm2 biochar (S3), shallow tillage + 6t/hm2 biochar (S6), shallow tillage + 9t/hm2 biochar (S9), and shallow tillage + 12t/hm2 biochar (S12), to investigate the combined effects of different tillage patterns and biochar application on soil nitrogen and phosphorus fractions, enzyme activities, and physiological characteristics of maize. [Results] The results of the study showed that: (1) deep tillage and shallow tillage in combination with biochar application could effectively improve soil structure, increase the geometric mean diameter of agglomerates and reduce the percentage of damage, and the deep tillage treatment was more effective than the shallow tillage treatment; (2) the application of biochar improved soil nitrogen-phosphorus fractions, urease activity, and alkaline phosphatase activity, and the effect of applying biochar at the rate of 9t/hm2 was the best, which was more pronounced in the deep tillage treatment; (3) deep tillage The application of biochar up to 9t/hm2 under deep plowing treatment increased the total nitrogen and phosphorus contents and glutamine synthetase activity of leaves, and decreased the acid phosphatase activity; (4) the yield of corn under deep plowing condition with the application of 9t/hm2 of biochar was as high as 17.37t/hm2, which was increased by 28.9% compared with that of the CK group. [Conclusion] The deep-tillage treatment and application of 9t/hm2 biochar provided a reference for the nutrient environment and crop growth in agricultural fields in the black soil area.

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History
  • Received:November 11,2023
  • Revised:December 31,2023
  • Adopted:January 02,2024
  • Online: April 29,2024
  • Published: