Results 31 to 40 of about 235 (103)
Shuitu Baochi Xuebao, 2019 为阐明不同土地利用类型土壤碳（C）、氮（N）、磷（P）生态化学计量学特征，对福州农田不同土地利用类型（水稻田、菜地和茉莉园）下的土壤全碳（TC）、全氮（TN）、全磷（TP）含量及其生态化学计量学特征进行测定和分析。结果表明：土壤TC含量均值基本表现为水稻田 > 菜地 > 茉莉园（P 菜地 > 茉莉园（P 水稻田 > 茉莉园 ...
刘旭阳 +5 more
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Speciation of trace metals and their uptake by rice in paddy soils [PDF]
, 2015 Rice (Oryza sativa L.) is the most important staple food in South and Southeast Asia and plays a crucial role in food security. However, with fast urbanization and industrialization and economic growth in these parts of the world, the production and ...
Pan, Y.
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Survival analysis of pneumoconiosis patients in Ninghai County of Zhejiang Province, 2019‒2023 [PDF]
ObjectiveTo understand the survival time and possible influencing factors of pneumoconiosis patients in Ninghai County, Zhejiang Province who were followed up from 2019 to 2023, and to provide references for prolonging the survival time of pneumoconiosis
CHEN Shuangping, HU Yanmin, ZHANG Feng
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Shuitu Baochi Xuebao, 2021 为筛选适用于西南地区稻田土壤及农作物Cd污染的修复技术，采用田间小区试验比较了单施石灰、生物炭以及复合施用石灰+生物炭及其不同用量对Cd污染稻田的土壤基本理化性质、稻米Cd含量及其水稻各部位富集转运的影响。结果表明：第1年修复试验中，单施石灰和生物炭以及复合施用均可降低稻米Cd含量以及水稻各部位富集和转运系数，且随着施加量的增加稻米Cd含量呈降低趋势，土壤至水稻根系Cd富集系数呈先降低后增加趋势，复合施用（石灰（1.5 t/hm2）+生物炭）效果优于单施石灰和生物炭，与对照相比，稻米Cd含量降低57 ...
赵莎莎 +4 more
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Research Progress of Different Types of Microorganisms Passivation and Fixation of Cadmium Contamination [PDF]
This is an article in the field of ecological restoration of mines. In recent years, the microbial passivation and fixation has gradually become a hotspot in the field of heavy metal contamination control.
Feng LAI +3 more
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模拟酸雨对福州平原水稻田土壤碳、氮、磷含量及其生态化学计量学特征影响
Shuitu Baochi Xuebao, 2019 为阐明酸雨对水稻田土壤碳（TC）、氮（TN）、磷（TP）含量及其生态化学计量学特征影响，以福州平原水稻田为研究对象，在早稻和晚稻生长期中，设置对照（CK）、模拟酸雨（pH为2.5，3.5，4.5）处理，对酸雨影响下福州平原水稻田土壤TC、TN和TP含量进行了测定与分析。结果表明：综合早稻和晚稻生长期来看，酸雨处理下土壤TC、TN和TP含量均值均大于CK组 ...
刘旭阳 +5 more
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Determination of Silicon in Soil and Sediment by ICP-OES with Rapid Ultrasonic Digestion [PDF]
The literature provides references for the accurate determination of silicon content in soil and sediment by inductively coupled plasma-optical emission spectrometry (ICP-OES).
Shengnan KONG, Shi XU
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CH_4 Dynamics in Sediments of Bruguiera sexangula Mangrove at Hegang Estuary [PDF]
, 2000 对海南东寨港河港河口海莲红树林土壤CH4动态进行研究。CH4通量季节变化规律为春季>夏季>秋季>冬季,所有季节所有滩面其平均值为1.21 mg/(m2d)。不同季节CH4产生量平均值的大小顺序也为春季>夏季>秋季>冬季,所有季节所有滩面其平均值为8.28 mg/(m2d);土壤理化因子对河港海莲林土壤CH4产生率的重要性依次为全氮>NaCl>Na+>Cl->SO42->含水量>总含盐量>有机质。暖季CH4氧化量高于冷季,平均值为7.06 mg/(m2d)。在所有季节所有滩面上 ...
卢昌义, 叶勇, 林鹏
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Shuitu Baochi Xuebao, 2019 通过选取土壤有效态镉（Cd）含量相近、母质不同的水稻土河沙泥（河流冲积物发育）和紫泥田（紫色砂页岩母质发育），添加不同浓度的外源Cd （0，0.5，1，2，5 mg/kg）模拟Cd污染稻田土壤进行盆栽试验，研究不同母质稻田土壤Cd胁迫条件下水稻不同生育期对Cd吸收累积的差异，并推算出土壤Cd环境安全临界值。结果表明，水稻生育期2种土壤有效态Cd含量均在分蘖期最高，河沙泥有效态Cd含量平均为0.47 mg/kg，紫泥田平均为0.36 mg/kg，同一外源Cd水平下，河沙泥土壤有效态Cd含量高于紫泥田 ...
董霞 +7 more
doaj
, 2018 为探索低桩机割再生稻高产途径,研究了水稻品种佳辐占再生分蘖节根的萌发特性.结果表明:头季低桩机割后再生季成穗分蘖为倒4、倒5节分蘖及其子蘖;倒4、倒5节分蘖有4个发根节,子蘖有3个发根节,每节萌发5~8条节根.各节节根萌发有恒定叶龄期:当第n节叶片开始伸长时,第n-3节节根开始萌发(节根原基突破茎秆表皮);当第n节叶片刚抽出时(该叶伸长近半),第n-3节少数节根显著伸长;当第n节叶片抽出70%时(该叶定长),第n-3节节根萌发数稳定.倒4、倒5节分蘖在头季机割后约10d,子蘖在头季机割后约20d ...
俞道标 +7 more
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