Results 11 to 20 of about 242 (109)
, 1997 本文是福建武夷山森林生态系统研究的一部分，主要讨论黄山松（Pinustaiwanensis）群落的氮磷累积和循环。测定结果表明：（1）群落现存量中氮（N）、磷（P）的库量分别为925．844kghm-2和45．981kghm-2，其中地上部分别为719．438kghm-2（占总库量的77．706%）和35．534kghm-2占77.280％），地下部分别为206．406kghm-2（占22．294％）和10．447kghm-2（占22.720％）；（2）N、P的生物循环中，年吸收量分别为65 ...
何建源 +5 more
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Response of Microbial Community Structure and Diversity to Nitrogen Deposition in Soils of Pinus yunnanensis Forest of the Central Yunnan Plateau [PDF]
[Objective] To study the characteristics of changes in chemical properties and diversity and structural composition of soil microbial communities in Pinus yun-nanensis soils on the Central Yunnan Plateau under nitrogen deposition, and to analyze the ...
DENG Qiujiang +6 more
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, 1997 本文主要讨论武夷山黄山松群落的钾、钠累积和循环。测定结果表明:(1)群落现存量中钾、钠的库量分别为35.876g/m~2和2.637g/m~2,其中地上部分为19.944g/m~2(占总库量的55.59％)和1.817g/m~2(占68.90％);地下部分别为15.932g/m~2(占44.41％)和0.820g/m~2(占31.10％);(2)在钾、钠的生物循环中,年吸收量分别为2.230g/m~2·a和0.136g/m~2·a;年存留量分别为2.230g/m~2·a和0.036g/m~2·a;(3 ...
刘初钿 +5 more
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STUDIES ON THE NUTRIENT RETRANSLOCATION EFFICIENCIES DURING LEAF SENESCENCE [PDF]
, 1999 国家自然科学基金!资助课题(No ...
林鹏, 王文卿
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Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration [PDF]
[Objective] Research on the preferential flow characteristics triggered by cracks in coal mining subsidence areas can provide support for scientific and rational development of water resource management and ecological management practice in the mining ...
DAI Bin +4 more
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Shuitu Baochi Xuebao, 2020 选择山杨栎类次生林（以下简称次生林）、刺槐林、侧柏林、油松林为研究对象，通过样地调查，结合室内浸泡方法，对比分析枯落物（未分解层、半分解层）的水文特征指标，研究典型林分枯落物层水文生态特性。结果表明：（1）枯落物厚度为3.93~4.95 cm，刺槐林最大，油松林最小；蓄积量为次生林最大（19.28 t/hm2），侧柏林（18.03 t/hm2）和刺槐林（17.57 t/hm2）次之，油松林最小（14.73 t/hm2），未分解层蓄积量小于半分解层。（2）枯落物最大持水量（率）为30.92~61.31 t/
马晓至 +6 more
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Characteristics of Soil Active Carbon Fractions and Carbon Pool Stability in Major Forest Types in Northern Daxing’an Mountains [PDF]
[Objective] Soil organic carbon is an important component of the carbon cycle in forest ecosystems, and active organic carbon can indicate changes in soil carbon pools.
CAI Tijiu, LIU Beibei
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Shuitu Baochi Xuebao, 2003 总结了迄今为止世界范围内对刺槐人工林培育的经验和研究成果,并结合我国的 实际情况,分析了我们在刺槐形态学与环境、刺槐育种、造林、抚育以及刺槐人工林群落学 特征等方面存在的不足之处和盲点,提出了我国将来进一步研究刺槐的方向的建议.
彭鸿, 陈晓荣, 余仲东
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Soil Quality Assessment of Five Typical Forest Stands in the Dianchi Lake Basin based on MDS [PDF]
[Objective] Soil quality is a critical indicator of ecosystem health and sustainable land management. [Methods] Key soil quality indicators (e.g., organic matter, total nitrogen, available nitrogen, capillary porosity, and pH) were identified through ...
HUANG Shuai +4 more
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Shuitu Baochi Xuebao, 2019 为研究晋西黄土区不同密度刺槐人工林对土壤水分的影响，分别选取2 400株/hm2与1 300株/hm2刺槐人工林代表研究区高、低密度刺槐林分，以裸地为对照，分别利用Enviro-SMART土壤水分定位监测系统和翻斗式自记雨量计对0—150 cm深度范围内各土层体积含水量与林外降雨进行定位观测。结果表明：（1）从不同降水年份来看，在干旱年和平水年，低密度刺槐生长季平均土壤储水量高于高密度刺槐，在研究年份中，低密度刺槐多年平均土壤储水量比高密度刺槐多年平均土壤储水量高6.80 mm。（2）在土壤剖面垂直方向，
王宁 +6 more
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