[1]DENG Xiaoqian,MA Sujuan,CAO Xiaoping,et al.Evaluation of the Cultivated Land Fertility and Trends of Soil Nutrient Status of Huzhu County in Qinghai Province in the Past 10 Years[J].Research of Soil and Water Conservation,2022,29(06):112-120.
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Evaluation of the Cultivated Land Fertility and Trends of Soil Nutrient Status of Huzhu County in Qinghai Province in the Past 10 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 06
Page number:
112-120
Column:
Public date:
2022-10-20
- Title:
- Evaluation of the Cultivated Land Fertility and Trends of Soil Nutrient Status of Huzhu County in Qinghai Province in the Past 10 Years
- Keywords:
- soil nutrient; cultivated land fertility; fuzzy comprehensive evaluation; temporal and spatial variation; Huzhu; Qinghai
- CLC:
- S158.2
- DOI:
- -
- Abstract:
- In order to study the changes of farmland soil physical and chemical properties and the fertility status in Huzhu County, Qinghai Province from 2006 to 2017, basic physical and chemical indexes of 4 176 soil samples in the villages and towns were analyzed, and the soil fertility was evaluated with the method of fuzzy comprehensive evaluation. We aimed to provide a scientific basis for the rational use of local cultivated land. The results showed that:(1)the soil nutrient status of cultivated land in Huzhu County was good, and the quality grade of each index was at the first three levels;(2)pH of cultivated land decreased by 5.20% due to the long-term use of acid compound fertilizer; long-term tillage resulted in fertility consumption, and the consumed elements were not replenished in time, resulting in a 9.69% reduction in SOM content; TK decreased by 32.02%; soil C/N ratio decreased by 27.28%;(3)the fertility of cultivated soil in Huzhu County showed a trend of low in southwest and high in northeast; the comprehensive soil fertility index increased by 5.77%, which was caused by the increase of nitrogen and phosphorus elements, and there was a risk of environmental pollution;(4)in the following tillage process, attention should be paid to the addition of organic fertilizer and potassium fertilizer, straw return to the field, broad beans and other crops rotation, little or no application of phosphorus fertilizer in order to reduce the risk of environmental pollution, and ensure good tillage environment and sustainable growth of crops.
- References:
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Last Update:
2022-10-20