Results 1 to 10 of about 705 (153)
Shuitu Baochi Xuebao, 2008 研究了干旱区绿洲种植年限不同的3种苜蓿地0-10 cm,10-20 cm土层土壤微生物量碳、微生物量氮、微生物量商、呼吸强度和代谢商的变化特征。结果表明:在耕层0-20 cm范围内,苜蓿种植年限的长短对土壤微生物量碳、土壤微生物量氮含量有影响,相对来说微生物量碳、氮在四年生苜蓿地的含量最高,其次是一年生苜蓿地的。不同种植年限苜蓿地之间土壤微生物量商(qMB)、呼吸强度、代谢商(qCO2)差异显著,相对来说种植年限相差越大,差异越大。相关分析结果表明,土壤理化特性对土壤微生物活性有影响,其中土壤微生物量碳、
YANG, JIANG, ZHAI, YANG, JIANG
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Soil carbon dynamic characteristics of coal gangue-filled reclaimed cropland and forest land under time series [PDF]
, 2023 In order to clarify the intrinsic mechanism between soil quality and soil carbon cycling after reclamation and to reveal the characteristic patterns of carbon dynamics of reclaimed soils under time series, the cultivated soils of 3, 6, 9 and 12 a ...
Junfeng QU +3 more
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Relationship Between Soil Factors and Enzyme Activities in Mangrove Wetland of Dongzhai Port [PDF]
, 2023 [Objective] Mangroves are part of a wetland ecosystem found along tropical and sub-tropical coastlines. The soil active organic carbon composition, soil enzyme activity, and the interaction between them, under different plant community conditions was ...
Chen Xiaohua +4 more
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Analysis of Volatile Flavor Compounds in Green Beans under Different Treatments by GC-MS and GC-IMS [PDF]
, 2021 Green beans was used as the research material, based on gas chromatography ion mobility spectroscopy (GC-IMS) and gas chromatography-mass spectrometry (GC-MS), the odor fingerprints of green beans were analyzed under 9 different treatments, including ...
FENG Tao +3 more
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, 2019 传统会展发展到现在,会展发展对环境的影响日益加深,由会展发展所带来的生态问题已引起有关部门和学者的关注。会展发展需要与区域生态进行协调发展,否则会产生破坏区域生物多样性、引起气候微环境变化、改变区域水土资源环境等生态环境问题。对此,开展展会规划整合,构建会展产业生态发展的政策激励机制,以及完善展馆内外生态环境,构建人与自然和谐发展环境等是构建区域生态会展的可行路径。福建省教育厅中青年社科类项目:“一带一路”背景下福建展会模式与4G技术研究（JAS170649）福建省社科规划项目 ...
吴彩莲
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铜和镉复合污染对红树林区微生物群落结构和沉积物酶活性的影响 [PDF]
, 2018 采用野外样地研究与室内根箱栽培相结合的方法,对漳江口红树林保护区铜、镉污染生境沉积物微生物结构与土壤酶活性进行研究,旨在探讨其对重金属的响应.微生物磷脂脂肪酸数据表明漳江口红树林湿地3种红树植物秋茄(Kandelia obovata)、白骨壤(Avicennia marina)、桐花树(Aegiceras corniculatum)根际土壤微生物群落的多样性与林外光滩区域比较差异有统计学意义 ...
严重玲 +6 more
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Shuitu Baochi Xuebao, 2020 选择黄土高原森林带自东向西8个地区优势植物的土壤作为研究对象，探究不同经度下土壤养分和土壤微生物生物量生态化学计量特征。结果表明：土壤碳、氮和微生物生物量碳、氮、磷含量随经度整体呈现出先减少后增加的变化趋势，土壤微生物生物量碳氮磷与土壤碳氮之间存在耦合关系，对环境因子的响应具有-致性。土壤磷含量空间分布比较稳定。土壤碳氮比为8左右，土壤有机碳与全氮的空间分布具有-致性。土壤微生物生物量碳氮比为9左右，微生物生物量氮磷比为5左右，反映了土壤微生物生物量碳氮、氮磷的比值较稳定 ...
贾培龙 +5 more
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Extracellular Enzyme Stoichiometric Characteristics of Subtropical Forest Soil under Forest Fire Disturbance [PDF]
[Objective] Forest fire, as the primary natural and human-induced disturbance in subtropical forests, seriously affects the soil biochemical cycle.
GUO Qiling +5 more
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Shuitu Baochi Xuebao, 2005 在金沙江干热河谷区的退化草地上进行了2年的氮磷施肥试验,试验结束后分析了土壤特性及土壤微生物数量和生物量的变化。结果表明,在施氮量为5 ,15g/ (m2 ·a)时,土壤微生物的数量和生物量均没有明显变化,而当施氮量增加到2 5g/ (m2 ·a)时,土壤微生物的数量和生物量比对照明显增加。施磷没有引起土壤微生物数量和生物量的明显增加。施氮和施磷均没有引起土壤细菌、真菌和放线菌组成的变化。这表明氮虽然影响土壤微生物的数量,但对土壤微生物的组成没有影响。施氮导致土壤硝态氮增加,但对氨态氮影响不大 ...
张彦东 孙志虎 沈有信
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Shuitu Baochi Xuebao, 2006 大田试验研究了保护性耕作对土壤微生物量、活跃微生物量、土壤呼吸、呼吸商、土壤酶的影响。结果表明，秸秆还田能够显著提高土壤微生物量碳和活跃微生物量，深松耕还田能显著提高土壤活跃微生物量。随耕作作业之后时间的推迟，活跃生物量减小。秸秆还田初期（小麦越冬期）能显著提高土壤呼吸作用，提高99．7％；后期（小麦播种期）能显著降低土壤呼吸，降低16．6％。随耕作作业之后时间的推迟，秸秆还田和保护性耕作都会减少农田向大气中CO2的排放，减少土壤碳库的亏损。深松耕还田显著提高土壤脲酶、蔗糖酶活性 ...
王芸 +7 more
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