[1]LUAN Fu-ming,XIONG Hei-gang,WANG Fang,et al.Responses of Soil Nutrients Variation Characteristics to the Cultivation Years in Wheatland of Desert-Oasis Ecotone[J].Research of Soil and Water Conservation,2014,21(05):49-53.
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Responses of Soil Nutrients Variation Characteristics to the Cultivation Years in Wheatland of Desert-Oasis Ecotone
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 05
Page number:
49-53
Column:
Public date:
2014-10-28
- Title:
- Responses of Soil Nutrients Variation Characteristics to the Cultivation Years in Wheatland of Desert-Oasis Ecotone
- CLC:
- S153
- DOI:
- -
- Abstract:
- In this paper, a comparative study was conducted to investigate soil nutrient content, index characteristics, evolvement rules and degradation degree of wastelands, alkali soils, wheat lands in the Gurbantunggut Desert-Qitai Oasis ecotone by using correlation analysis and soil degradation index(SNDI). The results showed that the positive correlation between soil organic matter of the surface layer and total nitrogen was higher, and soil organic matter of the surface layer had the poor relation to available nitrogen; available nutrients of the surface layer declined faster than those in the deeper layers; with the extension of cultivation years in wheat lands, the total nitrogen, total phosphorus, total potassium content changed little, and the available nutrients presented the great decrease, and available kalium [-38.18 mg/(kg·a)], available nitrogen[-14.875 mg/(kg·a)], available phosphorus [-4.486 mg/(kg·a)] were ranked the first, the second, and the third, respectively; SNDI of the untilled lands was -11.30%, and it was significantly lower than that that in wheat lands; SNDI in untilled lands was 4.317% in the first three years, and it was 6.485% in the following two years(5 a), and it finally was 0.788% in the following five years(10 a), which meant the soil degradation rate was faster in the early years, with the extension of cultivation years, SNDI reduced slowly.
- References:
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