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Pedosphere 2002年第2期12卷 121-130页

作者： CHENBAODONG LIXIAOLIN 等 Departmentofplantnutrition CollegeofAgriculturalResourcesandEnvironmentalSciencesChinaAgriculturalUniversityBeijing100094（China） DepartmentofagriculturalandEnvironmentalScience The

A modified glass bead compartment cultivation system was used tocompare some chemical and biolog- ical properties of the twoarbuscular mycorrhizal (AM) fungi Glmomus mosseae and Glomusversiforme using maize (Zea mays) as the host plant with four addedlevels of available phosphorus (P). The proportion of host plant rootlength infected was determined t harvest. Shoot and root yields andnutrient concentra- tions were determined, together with the nutrientconcentrations in the AM fungal external mycelium. The morphology ofvarious mycorrhizal structures of the two AM fungi was also comparedby microscopic obser- vation.

关键词： arbuscular mycorrhizal fungi copper maize phosphorus

Uptake of Organic Phosphorus by Arbuscular Mycorrhizal Red Clover

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Pedosphere 2002年第2期12卷 103-110页

作者： SONGYONGCHUN P.CHRISTIE Departmentofplantnutrition CollegeofAgriculturalResourcesandEnvironmentalSciencesChinaAgriculturalUniversityBeijing100094（China） DepartmentofagriculturalandEnvironmentalScience The

The capacities of two arbuscular mycorrhizal (AM) fungi, Glomusmosseae and Glomus versiforme, to mineralize added organic P werestudied in a sterilized clacareous soil. Mycorrhizal (inoculated witheither of the AM fungi) and non-mycorrhizal red clover (Trifoliumpratense L.) plants were grown for eight weeks in pots with upperroot, central hyphal and lower soil compartments. The hyphal and soilcompartments received either organic P (as Na-phytte) or inorganic P(as KH_2.O_4) at the rate of 50 mg P kg^-1. No P was added to theroot compartments.

关键词： arbuscular mcorrhiza organic P P uptake red clover

Utilization of Sparingly Soluble Phosphate by Red Cloverin Association with Glomus mosseae and Bacillus megaterium

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Pedosphere 2002年第2期12卷 131-138页

作者： YAOQING QINGFANGLING 等 DepartmentofagriculturalandEnvironmentalScience TheQueen′sUniversityofBelfastNewforgeLaneBelfastBT95PX（UK） Departmentofplantnutrition CollegeofAgriculturalResourcesandEnvironme

A pot experiment was conducted to investigate the mobilization ofsparingly soluble inorganic and organic sources of phosphorus (P) byred clover (Trifolium pratense L.) whose roots were colonized by thearbuscular mycorrhizal (AM) fungus Glomus mosseae and in associationwith the phosphate-solubilizing (PS) bacterium Bacillus megateriumACCC10010. Phosphate-solubilizing bacteria and rock phosphate had asynergistic effect on the colonization of plant roots by the AMfungus. There was a positive interaction between the PS bacterium andthe AM fungu in mobilization of rock phosphate, leading to improvedplant P {2.. In dual inoculation with the AM fungus and the PSbacterium, the main contribution to plant P {2. was made by theAM fungus. Application of P to be low P soil increased phosphataseactivity In the rhizosphere. Alkaline phosphatase activity wassignificantly promoted by inoculation with either the PS bacterium orthe AM fungus.

关键词： arbuscular mycorrhiza organicphosphorus phosphatase hosphate-solubilizing bacteria

典型石漠化地区不同植被类型地表水土流失特征研究

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水土保持学报 2009年第2期23卷 1-6页

作者：李生任华东姚小华张守攻杨实兰应秋农美东中国林业科学研究院亚热带林业研究所国家林业局亚热带林木培育重点开放性实验室浙江富阳311400 中国林业科学研究院北京100091 广西壮族自治区凌云县林业局广西凌云533100

在典型喀斯特石漠化地区广西凌云县设置径流小区,通过对不同植被类型地表径流及养分流失观测与分析,结果表明,喀斯特石漠化地区,在降雨历时短且大雨以上强度的降雨条件下存在地表径流,单次径流系数平均值在1.5%-13.8%之间,年平均径流量... 详细信息

在典型喀斯特石漠化地区广西凌云县设置径流小区,通过对不同植被类型地表径流及养分流失观测与分析,结果表明,喀斯特石漠化地区,在降雨历时短且大雨以上强度的降雨条件下存在地表径流,单次径流系数平均值在1.5%-13.8%之间,年平均径流量为75.86 mm。地表径流量与每次降雨量之间具有显著的相关性,其相关系数在0.8967-0.9475之间。不同植被类型间年径流量差异极显著,农耕地产生的年径流量最大,达12..75 mm,灌木林地产生的年径流量最小,达54.08 mm。径流中泥沙浓度整体表现出春秋季浓度高,夏季浓度低的趋势。不同植被类型间的侵蚀模数差异极显著,侵蚀模数平均达到45.88 t/km^2.a,属微度侵蚀。耕作加剧了土壤扰动,对土壤流失有显著的影响,农耕地土壤侵蚀模数（98.91 t/km^2.a）最大,灌木林地土壤流失量（5.42./km^2.a）最小。径流中全N浓度呈现出随时间而下降的趋势,全P、全K浓度呈现出春秋季高、夏季低的趋势。不同植被类型间流失全N、全P、全K总量差异极显著,植被能够有效减少地表径流及养分的损失,在该地区应该促进植被恢复。

关键词：石漠化植被类型地表径流养分流失