Grasslands and Grassland Sciences in Northern China (1992) / Chapter Skim
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6 Gansu and Qinghai
6 Gansu and Qinghai
Pages 93-108
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From page 93... ...
Wan Changgui, former research associate at the Gansu Grassland Ecological Reseerch Institutes and Tian Shuning, Ph.D. candidate at Texas Tech University, survey grassland research in Gansu and Qinghai provinces.
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From page 94... ...
For example, the Yongfeng grassland in Tianzhu County has ~ 0 = 1331°C and r= 46~1 mm, placing it in zone 42 on the chart, a "cold-temperate, humid" grassland, or alpine meadow. This key chart shows fundamental soil and vegetation characteristics and can be used to estimate the primary biomass of grasslands (Ren, unpublished data, 19801.
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From page 95... ...
In this work, the authors divided the energy flow of grassland production into six stages: solar energy to plant biomass, plant biomass to available forage, available forage to forage intake, forage intake to digestible nutrients, digestible nutrients to animal biomass, and animal biomass to available animal productivity. They calculated energy conversion efficiency at each stage and concluded that available animal productivity can vary from O to 16% of net primary productivity.
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From page 98... ...
In the future, young animals will be brought to the valley from the mountain grassland to be fattened on the spring am1 .summer growth of these pastures. PRODUCTIVITY AND NUTRIENT CYCLING There have been several reports on the primary productivity and biomass of alpine grasslands in Gansu, and Qinghai provinces (Yang et al., 1981; Hu and Mu, 1982; Lang et al., 1984; Zhou and Zhang 1986; Flu et al.
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From page 99... ...
(1986) investigated the influence of heavy snow on the population density of the plateau zokor, plateau pike, and root vole in Haibei alpine meadow.
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From page 101... ...
in the Haibei alpine meadow station in Qinghai using simulation models. Quantitative studies of vegetation succession on the abandoned arable land of the subalpine meadows in southern Gansu have been carried out by researchers from the ecology lab of Lanzhou University.
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From page 102... ...
According to these studies, the temperate cold grasslands and subtropic damp grasslands are not selenium deficient, but the temperate humid grasslands are severely selenium deficient. Aerial seeding of forage plants has been reviewed by Huang (1985)
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From page 104... ...
1985. Preliminary analysis of the Grassland Agricultural System at the Qingyang Loess Plateau Experimental Station.
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From page 108... ...
1981. The principal vegetation types and their geographical distribution at the Haibei Alpine Meadow Ecosystem Research Station, Menyuan County, Qinghai Province.
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