[1]ZHANG Jian,WEI Zhanmin,MA Xin,et al.Influence of PAM on Nitrogen of Salinized Soil[J].Research of Soil and Water Conservation,2015,22(04):12-17.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 04
Page number:
12-17
Column:
Public date:
2015-08-28
- Title:
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Influence of PAM on Nitrogen of Salinized Soil
- Author(s):
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ZHANG Jian, WEI Zhanmin, MA Xin, BAI Yinzhen, WANG Xiaoyu
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College of Water Conservancy and Civil Engineering Construction, Inner Mongolia Agricultural University, Hohhot 010018, China
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- Keywords:
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polyacrylamide; soil salinization; orthogonal test; utilization rate of nitrogen
- CLC:
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S156.4+9;S278
- DOI:
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- Abstract:
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In order to study the temporal and spatial changes of nitrogen and its utilization after applying Polyacrylamide(PAM) in soil salinization of area in Hetao during the whole sunflower growth period, we used the orthogonal experiment to analyze the dynamic change rule of alkali hydrolysable nitrogen and utilization rate of nitrogen in 0—100 cm soil depth during the sunflower growth.The results show that application of PAM could keep certain alkali hydrolysable nitrogen and limit the alkaline hydrolysis nitrogen to move downwards in the PAM application layer of the soil salinization, in the 4 irrigation treatments without applying PAM, alkali hydrolyzable nitrogen moved downward to about 40 cm at different degrees, indicating that application of PAM had the obviously restraining effect on nitrogen movement, and controlled nitrogen leaching, prevented soil barren. Through the analysis of the utilization rate of fertilizer and orthogonal experiment and main effect analysis of SPSS, the selected three optimum factor quantities are following:water is 1 800 m3/hm2, nitrogen is 168 kg/hm2, PAM is 18.75 kg/hm2, and application of PAM has the significant influence on utilization rate of nitrogen fertilizer in moderate salinized soil. The research results can provide the theoretical basis for using reasonable amount of nitrogen application and improving the application of PAM on utilization rate of nitrogen in salinization soil of irrigation area of Hetao.