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Study on Plant and Soil Characteristics of Two Differen Plantations in Steppe Region of Ulanqab

Author: ZhangJinWang
Tutor: LiGangTie
School: Inner Mongolia Agricultural University
Course: Soil and Water Conservation and Desertification Combating
Keywords: Plantation Stand density Soil nutrient Biodiversity
CLC: S714
Type: Master's thesis
Year: 2010
Downloads: 62
Quote: 0
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Abstract


In this study, in October 2007 -2008 in September in Inner Mongolia Wulanchabu Chahaeryouyihouqi moor Taiwan flag state-owned land for forestry . Different types , different density plantations soil properties and vegetation characteristics were analyzed , the main findings are as follows : ( a ) the forest plantation planting soil quality has declined markedly. Poplar band fine clay content of the soil increased , poplar increases with the outer edge of the soil bulk density , an increase of 8.84% ; density elm forest soil water content was significantly lower quality poplar , elm forest and high-density control grass the water content of soil quality , it makes soil moisture decreased, a decline of 28.42% ; poplar growth reduced the soil organic matter , a decline of 43.80% ; density elm forest and poplar with the outer edge of the soil PH value increased, the respective increases 2.8% and 2.4% respectively. Soil nitrogen , phosphorus and potassium content of only high content of potassium , nitrogen and phosphorus are in the region of non- cultivated soil nutrient levels or less. ( 2 ) changes in plant community characteristics between subjects in each test area there is a big difference , but overall is a high density elm forest height maximum , minimum density ; high density elm maximum coverage with glade ; poplar important value within the maximum ; Low density biomass on Yushulin largest mainland . ( 3 ) The test area has different diversity index, but the overall trend of diversity indices are basically the same , each forest diversity indices were the highest , middle grass , forest edge minimum . Rinnai evenness index in each of between 0.8-0.9 , 0.45-0.55 between diversity index , richness index between 4.5-7 , poplar inner richness index was significantly higher than the other test area ( high density elm except with glade ) .

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CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest soil science
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