Characteristics and Response of Soil-leaf Ecological Stoichiometry of Suaeda Microphylla and Apocynum Pictum Under Different Salt Habitats [PDF]
, 2023 [Objective] The change trend and main limiting factors of the ecological stoichiometric characteristics of soil and leaves in different saline habitats were analyzed in order to provide basic research data for the study of nutrient limiting factors and ...
Bahebe Lede +5 more
core +1 more source
Effects of Continuous Straw Returning Combined with Reduced Fertilizer Application on Rice Yield and Loss of Nitrogen and Phosphorus [PDF]
, 2022 [Objective] The effects of straw returning combined with reduced chemical fertilizer application on rice yield and nitrogen and phosphorus losses with runoff were studied in order to provide a scientific basis for the recycling and reuse of local ...
Liang Fan +8 more
core +1 more source
Effects of Cross-slope Tillage and Increasing Organic Fertilizer on Soil Nitrogen and Phosphorus Loss Characteristics and Soil Fertility on Gentle Slope [PDF]
, 2023 [Objective] Nitrogen and phosphorus loss characteristics and soil fertility changes on a gentle slope of cultivated land were analyzed under optimal fertilization and cross-slope tillage in order to provide a basis for reducing nitrogen and phosphorus ...
Chen Jianjun +4 more
core +1 more source
Shuitu Baochi Xuebao, 2001 以莫莫格湿地为研究对象 ,研究了氮磷在湿地土壤中的空间分布。结果表明 ,表层土壤全氮、全磷含量显著高于下层土壤 ,土壤全氮的水平变异性较全磷强 ;全氮和全磷的垂直分布总体变化趋势均为由上到下依次减少 ,且都以 5 0 cm处为其变化转折点 ,但全氮的变化较全磷快 ;全磷、全氮含量与土壤有机质、N/ P比极显著相关 ,但p H值对其影响十分微弱。
白军红 邓伟 等
doaj +2 more sources
Effects of Configuration Ratios for Contour Planting and Replanted Sugarcane on Gully Erosion-Induced Nitrogen and Phosphorus Losses on Slopes [PDF]
, 2023 [Objective] The suitable configuration ratios for contour planting and replanted sugarcane on slopes were determined in order to provide technical support for reducing slope ditch erosion and nutrient loss, improving cultivated land quality and rational ...
Chen Tingting +8 more
core +1 more source
Effects of Different Ratios of Mineral-solubilizing Microbes and Water-retaining Agents on Soil Nutrients and Enzyme Activities [PDF]
, 2022 [Objective] The effects of mixed additions of a water-retaining agent and bacterial agents on soil characteristics were determined in order to provide a theoretical basis for promoting mine vegetation restoration.
Chen Meiling +6 more
core +1 more source
Shuitu Baochi Xuebao, 2020 以陇西县600份土壤全氮含量数据为基础，应用地统计学研究陇西县土壤氮素的空间分布特征并计算了该区域的氮储量，采用相关性分析、主成分分析等方法探讨了影响全氮空间分布的影响因素。结果表明，陇西县土壤全氮含量为（0.734±0.306） g/kg，变异系数属于中等程度变异；氮密度平均值为0.091 kg/m2，氮储量为7.6×106 kg，其中0—10，10—30，30—50 cm土层氮储量分别占到0—50 cm土层氮储量的35.97%，7.06%，56.97%。陇西县土壤全氮含量及氮储量空间分布相似 ...
任建新 +4 more
doaj
Shuitu Baochi Xuebao, 2007 用Bremner有机氮分组法测定了连续7年采用不同灌溉方法灌溉的保护地土壤各剖面层次有机氮组分含量。结果表明,土壤全氮及有机氮各组分含量均随土层深度的增加而降低,但有机氮各组分占全氮的比例随土层深度增加的变化却无明显规律。用3种灌溉方法灌溉,不同土层间土壤有机氮各组分含量的差异主要存在于0~50 cm土层,50 cm以下差异很小;相同土层,土壤有机态氮含量均以酸解氮为主,且酸解氮中各组分绝对含量和相对含量的大小排列顺序均为,未知态氮>氨态氮>氨基酸态氮>氨基糖态氮。在0~80 cm土层,
姬景红 +4 more
doaj +2 more sources
Shuitu Baochi Xuebao, 2022 研究植茶对土壤团聚体全氮和矿质氮的影响可为茶园土壤合理施用氮肥提供理论依据。通过野外调查和室内分析, 研究不同茶树品种(福鼎大白、川茶3号、川农黄芽早和川沐217)对土壤团聚体中全氮和矿质氮含量的影响。结果表明: (1)各植茶品种土壤团聚体含量随粒径减小呈先减小后增大的变化趋势, >2 mm粒径团聚体含量显著高于其他粒径团聚体, 其含量约占总量的38.32%~66.26%。(2)各植茶品种土壤全氮含量均随团聚体粒径的减小呈先减小后平稳的趋势, 而铵态氮和硝态氮的变化趋势则相反。(3 ...
于子涵 +3 more
doaj
塔里木沙漠公路防护林土壤微生物生物量与土壤环境因子的关系 [PDF]
, 2009 为探讨极端干旱区风沙土土壤微生物与土壤环境因子的作用规律,采用相关分析法研究了塔里木沙漠公路防护林地土壤微生物生物量与理化因子和酶活性的关系.结果表明:土壤容重和粒径减小(R0.85)时,防护林地中土壤微生物数量和生物量有增大趋势,由容重与微生物量的相关性主导;土壤养分含量与土壤微生物数量和生物量呈正相关,主要由速效养分和放线菌、微生物生物量C、P的相关性所致;土壤酶活性与土壤微生物数量和生物量的相关性差异较大,R在0.51～0.91,主要取决于蔗糖酶、磷酸酶与放线菌、微生物量C的相关 ...
周宏伟 +7 more
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