[1]CHEN Tingting,DUAN Xu,ZHAO Yangyi,et al.Effects of Root Characteristics of Typical Native Plants on Soil Macropore in the Arid Valley of Honghe River[J].Research of Soil and Water Conservation,2020,27(06):107-115.
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Effects of Root Characteristics of Typical Native Plants on Soil Macropore in the Arid Valley of Honghe River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
107-115
Column:
目次
Public date:
2020-10-20
- Title:
- Effects of Root Characteristics of Typical Native Plants on Soil Macropore in the Arid Valley of Honghe River
- Keywords:
- soil macropore; water penetration curve; root length density; root weight density; dry valley
- CLC:
- S152.5
- DOI:
- -
- Abstract:
- In order to investigate the effect of plant root system characteristics on soil macropores, based on the water penetration curve method and classical statistical analysis, quantitative analysis of plants in the forest land, grassland, garden land and agricultural land in the Longtanqing small watershed of Xinping County, Yuxi City was carried out. The effects of plant root characteristics on the formation of soil macropores were quantitatively analyzed. The results show that:(1)the stable outflow rate of soil water penetration curves of four land plots decrease in the order: forest land>garden>wasteland>farmland, and there are significant differences among different types(p<0.05); the overall development trend of the curve is consistent, all increase first, and then tend to be stable after a period of time; the surface outflow rate is greater than the deep layer;(2)the equivalent pore diameter of the four types of soil mcropores is between 0.3～3.7 mm, of which the density of 0.3～1.0 mm is the largest, accounting for more than 96% of the total number of large pores, the density greater than 1.0 mm is the smallest, accounts for only 2%～4% of the total number of large pores; the large pore density is 1.383×104～2.477×104 per square meter, the macropore densities in the four types of land decrease gradually with the increase of the depth of the soil layer. The overall trend follows the order: forest land>garden land>wasteland>farmland;(3)both root length density and root weight density show the decreasing trend with the increase of soil depth; the fine root system(root diameter d<1 mm)has the high contribution to the formation of soil macropores, while the relatively thick root system(root diameter d>1 mm)has the lower contribution to the formation of large pores in the soil;(4)the correlation between the soil macropores of the agricultural land, garden land and forest land and the root weight density within the root diameter range of 0<d≤5 mm is extremely significant(p<0.01); the desert grassland is within the root diameter range of 3<d≤5 mm, the root weight density is significantly correlated(p<0.05); the fine root system significantly affects the formation of large pores in the soil, while the coarse root system has the lower effect.
- References:
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Last Update:
2020-10-20