[1]MA Xu,WANG Jinxin,ZHANG Yuyu,et al.Effects of Water and Fertilizer Conditions on Photosynthesis and Biomass of Two Forage Grasses in Coal Gangue Soil[J].Research of Soil and Water Conservation,2021,28(01):179-187.
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Effects of Water and Fertilizer Conditions on Photosynthesis and Biomass of Two Forage Grasses in Coal Gangue Soil
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 01
Page number:
179-187
Column:
Public date:
2021-01-10
- Title:
- Effects of Water and Fertilizer Conditions on Photosynthesis and Biomass of Two Forage Grasses in Coal Gangue Soil
- Keywords:
- gangue field; net photosynthetic rate; biomass; water-fertilizer coupling; vegetation restoration; model optimization
- CLC:
- S158.3
- DOI:
- -
- Abstract:
- Coal mining activities produce a huge amount of coal gangue and other solid wastes, which are deposited in piles and replace a large area of arable land into bare land. Moreover, these mining activities are more severe in the arid desert area of northwest China where scarcity of water and nutrients plays a significant role in the vegetation restoration. A quadratic general rotary combination design was adopted to examine the influence of different doses of water and fertilizers on the photosynthesis and biomass of Melilotus albus Desr. and Agropyron mongolicum Keng grown in coal mine spoils. Moreover, to identify a suitable water and fertilizer doses for vegetation restoration in the coal gangue area of northwest China. The experimental results showed that soil water was most important factor for the net photosynthesis rate and biomass production of the two forage grasses, and also demonstrated that the influence of phosphorus fertilizer on growth of Melilotus albus Desr. was higher than that of nitrogen fertilizer, whereas the influence of nitrogen fertilizer on growth of Agropyron mongolicum Keng was higher than that of phosphorus fertilizer. The net photosynthesis rate and biomass production of Melilotus albus Desr. were greater higher than Agropyron mongolicum Keng, suggesting that planting Melilotus albus Desr. for revegetation purpose in the northwest coal gangue area with optimum water and fertilizer doses is the effective practice, which follows the pattern: soil relative water content 68.44%～71.84%, nitrogen application 82.09～102.92 kg/hm2, phosphorus application 139.92～192.58 kg/hm2. In addition, vegetation with Agropyron mongolicum Keng using soil relative water content of 65.33%～71.11%, nitrogen application of 138.40～172.62 kg/hm2, phosphorus application of 82.09～117.91 kg/hm2 can also be considered as a second option.
- References:
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Last Update:
2021-01-15