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Changes in N,P and K Contents in Eum-orthic Anthrosols at Different Moisture Contents

Asian Agricultural Research 2021年第3期13卷 35-36,51页

作者： Tingting MENG Hao DONG Shaanxi Provincial Land Engineering Construction Group Co. Ltd.Xi'an 710075China Institute of Land Engineering and Technology Shaanxi Provincial Land Engineering Construction Group Co.Ltd.Xi'an 710075China Key Laboratory of Degraded and Unused Land Consolidation Engineering of Ministry of Natural Resources ChinaXi'an 710075China Shaanxi Provincial Land Consolidation Engineering Technology Research Center Xi'an 710075China Land Engineering Technology Innovation Center Ministry of Natural ResourcesChinaXi'an 710075China

[Objectives]This study aimed to provide a basis for the management of nitrogen,phosphorus and potassium nutrients in eum-orthic anthrosols and the fertilization of crops.[Methods]Using the indoor culture method,the contents of total nitrogen,available phosphorus and available potassium in eum-orthic anthrosols under three different moisture conditions:long-term drying,long-term logging and alternate drying and logging were analyzed and compared.[Results]The total nitrogen content was higher under the moisture condition of long-term *** minimum(0.60 g/kg)appeared on day 30,and the maximum(0.74 g/kg)appeared on day 120,increased by 8.8%compared with the *** available phosphorus content was also higher under the moisture condition of long-term *** minimum(16.9 mg/kg)appeared on day 60,and the maximum(22.5 mg/kg)appeared on day 120,increased by 33.1%compared to the *** available potassium content showed a downward trend under long-term logging,and was higher than those under the other two moisture *** maximum(150 mg/kg)appeared on day 30,and the minimum(136 mg/kg)appeared on days 75 and 90,reduced by 9.3%compared with the maximum.[Conclusions]Water plays a positive role in activating *** nutrients have different responses to different moisture conditions.

关键词： Eum-orthic anthrosols Nitrogen Phosphorus Potassium Alternate drying and logging long-term drying long-term logging

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