| Eco\|stoichiometry characteristics of grape fields with different planting years in the east foothills of Helan Mountain |
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| DOI：10.7606/j.issn.1000-7601.2020.05.04 |
| Key Words: vineyard planting years eco\|stoichiometry character east foothills of Helan Mountain |
| Author Name | Affiliation | | HE Jing | School of Resources and Environment, Ningxia University, Yinchuan, Ningxia 750021, China | | WEI Qiqi | School of Resources and Environment, Ningxia University, Yinchuan, Ningxia 750021, China | | ZHONG Yanxia | Science and Technology Department, Ningxia University, Yinchuan, Ningxia 750021, China | | LUO Lingling | School of Resources and Environment, Ningxia University, Yinchuan, Ningxia 750021, China |
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| Abstract: |
| This paper took the vineyard soil of different planting ages (1 a, 7 a, and 20 a) in the east foothills of Helan Mountain in Ningxia as the research object, and took the uncultivated desert grassland as the control, collected the soil of 0~100 cm layer, measured the organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), total potassium (TK) content, and the characteristics of the ecological stoichiometry of soil under different planting years and different soil depths, in order to provide the basis for the judgment of limited nutrient and the control mechanism of nutrient element balance of the grape growing area in the east foothills of Helan Mountain. The results showed that: (1) The soil was impoverishment in this area with the average value of soil C, N, and P at 4.88, 0.56 g·kg-1 and 0.24 g·kg-1, respectively, which were less than the national levels (11.12, 1.06 g·kg-1 and 0.65 g·kg-1), but the average value of soil K was 28.88 g·kg-1, higher than the national level (16.6 g·kg-1). The soil SOC varied from 3.93 g·kg-1 to 5.36 g·kg-1, the TN varied from 0.39 g·kg-1 to 0.73 g·kg-1, the TP varied from 0.21 g·kg-1 to 0.37 g·kg-1, the TK varied from 27.88~30.16 g·kg-1 with increasing planting years. The contents of C and N in soil first decreased and then increased, the content of P gradually increased, the content of K gradually decreased, but there was no significant difference among years. （2) The changes of land use patterns and the vegetation coverage provided different effects on the soil ecological stoichiometry character. The soil C∶N ratios varied from 8.7 to 10.6, C∶P varied from 16.78 to 33.29, C∶K varied from 0.14 to 0.22. With increasing of the planting years, the C∶P, C∶K, and N∶P of soil showed a decrease trend in the first and then increased, although the C∶N of soil gradually decreased, but the difference was not significant. The N∶P of soil was between 1.66~3.61, and less than the national average of 5.2, showed that the grape growth in the east foothills of Helan Mountain was mainly restricted by N. In the process of grape planting in the east foothills of Helan Mountain in Ningxia, properly matched the application proportion of various nutrient elements and organic fertilizer should be considered to prevent the decline of soil fertility. |
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