Abstract
The distribution gradient of soil organic matter, nitrogen and phosphorus, productivity changes, and their responses to environmental factors were analyzed in this study. The data analyzed in this study was collected from sites at 6 different altitudes ((3 840),3 856,3 927,3 988,4 232,4 435 m), in the alpine meadow. The results indicated that the amount of soil organic matter, soil total nitrogen, soil available nitrogen and soil total phosphorus were higher at the altitudes of 3 840 m and 4 435 m and lower at the mid-altitude gradients. Soil available phosphorus fluctuated. The effect of precipitation on soil organic matter, nitrogen and phosphorus decreased with soil total nitrogen, soil organic matter, soil total phosphorus, soil available nitrogen and soil available phosphorus. The effect of temperature on soil organic matter, nitrogen and phosphorus decreased with soil available nitrogen, soil organic matter, soil total nitrogen, soil total phosphorus, and soil available phosphorus. Based on the results from the study it was concluded that temperature was the major environmental factor that affected the primary productivity of the plant community in the alpine meadow. The stepwise regression equation with environmental factors was: Ya=-92.982+13.832X_3 (F=13.355,P0.05).
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Claims 6
Claim · model-written summary
Soil organic matter, total nitrogen, available nitrogen and total phosphorus were higher at 3 840 m and 4 435 m and lower at mid-altitudes along the alpine meadow gradient.
- Outcome
- soil organic matter, soil total nitrogen, soil available nitrogen and soil total phosphoruse1
- Direction
- highere1
- Qualifier
- lower at the mid-altitude gradientse1
Not reportedTaxon
Verbatim
e1“the amount of soil organic matter, soil total nitrogen, soil available nitrogen and soil total phosphorus were higher at the altitudes of 3 840 m and 4 435 m and lower at the mid-altitude gradients”
Claim · model-written summary
Soil available phosphorus fluctuated along the altitude gradient.
Not reportedTaxon
Verbatim
e1“Soil available phosphorus fluctuated”
Claim · model-written summary
The effect of precipitation on soil organic matter, nitrogen and phosphorus decreased in the order of soil total nitrogen, organic matter, total phosphorus, available nitrogen and available phosphorus.
- Treatment
- precipitatione1
- Outcome
- soil organic matter, nitrogen and phosphoruse1
- Qualifier
- decreased with soil total nitrogen, soil organic matter, soil total phosphorus, soil available nitrogen and soil available phosphoruse1
Not reportedTaxonDirection
Verbatim
e1“The effect of precipitation on soil organic matter, nitrogen and phosphorus decreased with soil total nitrogen, soil organic matter, soil total phosphorus, soil available nitrogen and soil available phosphorus”
Claim · model-written summary
The effect of temperature on soil organic matter, nitrogen and phosphorus decreased in the order of soil available nitrogen, organic matter, total nitrogen, total phosphorus and available phosphorus.
- Treatment
- temperaturee1
- Outcome
- soil organic matter, nitrogen and phosphoruse1
- Qualifier
- decreased with soil available nitrogen, soil organic matter, soil total nitrogen, soil total phosphorus, and soil available phosphoruse1
Not reportedTaxonDirection
Verbatim
e1“The effect of temperature on soil organic matter, nitrogen and phosphorus decreased with soil available nitrogen, soil organic matter, soil total nitrogen, soil total phosphorus, and soil available phosphorus”
Claim · model-written summary
Temperature was concluded to be the major environmental factor affecting primary productivity of the plant community in the alpine meadow.
Not reportedDirection
Verbatim
e1“temperature was the major environmental factor that affected the primary productivity of the plant community in the alpine meadow”
Claim · model-written summary
A stepwise regression equation of productivity on environmental factors was Ya=-92.982+13.832X_3 (F=13.355).
Verbatim
e1“The stepwise regression equation with environmental factors was: Ya=-92.982+13.832X_3 (F=13.355,P0.05)”