Results 31 to 40 of about 809 (148)

黄土高原人工油松林土壤碳氮对短期氮添加的响应

open access: yesShuitu Baochi Xuebao, 2018
为了更好地理解土壤碳氮元素对氮添加的响应,通过短期原位模拟氮沉降试验,揭示黄土高原子午岭人工油松(Pinus tabulaeformis Carrière)林土壤碳氮对外源氮添加的响应过程和机制。从2015—2016年设置4个氮添加水平,分别为对照(0 kg/(hm2·a),N0)、低氮(50 kg/(hm2·a),N50)、中氮(100 kg/(hm2·a),N100)和高氮(200 kg/(hm2·a),N200),研究人工油松林地不同深度土层土壤有机碳和全氮以及土壤碳氮储量对模拟氮添加的响应 ...
陈磊   +4 more
doaj  

The Impact of Mixed Application of Modified Straw Biochar and Organic Fertilizer on Soil Water Retention and Fertility Maintenance in the Loess Hilly Dry Area [PDF]

open access: yes
[Objective] This study aimed to investigate the effects of different modified corn straw biochars on the water retention and fertilizer conservation capacity of arid loess soil and their effects on crop growth.
CHANG Fangling   +5 more
core   +1 more source

Tree mycorrhizal associations regulate relationships between plant and microbial communities and soil organic carbon stocks at local scales in a temperate forest

open access: yesFunctional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang   +10 more
wiley   +1 more source

水曲柳人工林土壤养分的空间异质性研究

open access: yesShuitu Baochi Xuebao, 2007
采用地统计学的变异函数分析方法,定量研究了14年生水曲柳人工林表层土壤(0~10cm)养分的空间异质性特征。结果表明:(1)土壤有效磷、全钾和速效钾变异函数曲线的理论模型符合指数模型,土壤pH值符合球状模型,土壤全氮、水解氮和全磷的理论模型符合指数模型或球状模型;(2)土壤养分各项指标的空间变异主要是由结构性因素引起,且空间自相关程度均属中等以上(空间结构比均在25%以上);(3)土壤pH值的空间自相关范围最大(2.27~4.46m),土壤全磷的自相关范围(0.73~0.97m)小于全钾和全氮(分别为1.
孙志虎, 王庆成
doaj   +2 more sources

Fractal characteristics and related affecting factors of particle size distribution in mangrove soils in Dongzhai Harbor of Hainan [PDF]

open access: yes, 2008
应用分形理论分析了海南东寨港红树林土壤粒径分布的分形特征及其影响因素,海南东寨港土壤的分形维数为2.302~2.575,分形维数的大小与土壤中的粘粒、盐分、有机质、全氮含量呈显著正相关,外滩红树林土壤的分形维数低于中滩和内滩;随着土壤质地由砂壤土、轻壤土、中壤土、重壤土的变化,分形维数逐渐增大;从陆到海土壤分形维数逐渐减小。群落类型、土壤质地、滩位、含盐量、有机质、全氮含量等是影响海南东寨港红树林土壤分形维数的主要因子。The analysis with fractal theory on the ...
刘美龄, 叶勇, 唐飞龙, 曹长青
core  

Plant–microbe interactions drive the rhizosphere microbial assembly and nitrogen cycling in a subtropical forest

open access: yesFunctional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang   +9 more
wiley   +1 more source

长期不同施肥制度对农田黑土有机质和氮素的影响

open access: yesShuitu Baochi Xuebao, 2005
以黑龙江省海伦黑土地区的农田长期(1985~2003年)定位试验土样为材料,对不同施肥处理土壤有机质含量、土壤全氮进行了系统研究。结果表明,长期无肥处理土壤有机质含量、全氮含量最低;长期施用氮肥、氮磷肥、有机肥处理土壤有机质含量、全氮含量居中;有机肥与化肥配合施用比无肥处理可显著提高有机质水平,增加土壤全氮含量。各处理C/N比值在9.91~13.10之间变动。
隋跃宇 张兴义 焦晓光 王其存 赵军
doaj   +2 more sources

Evaluation of the Effectiveness of Soil Improvement Measures in Apple Orchards on the Loess Plateau: A Meta-Analysis [PDF]

open access: yes
[Objective] Soil acidification, structure and fertility degradation and poor water-holding capacities are common problems in the apple orchard on the Loess Plateau, effective soil improvement techniques are crucial for enhancing soil quality, and ...
DUAN Shunxia   +3 more
core   +1 more source

川中丘陵区典型小流域土壤氮素空间变异特征及影响因素研究

open access: yesShuitu Baochi Xuebao, 2008
根据94个样点表层土壤(0—20 cm)氮素的化验数据,在ArcGIS 9.0平台上运用地统计学方法研究了川中丘陵区清流河流域土壤全氮和速效氮的空间变异特征及其影响因素。结果表明,研究区土壤全氮和速效氮含量总体水平较低,二者平均值分别为(0.85±0.03)g/kg和(63.8±25.4)mg/kg。土壤全氮含量总体上呈条带状或斑块状分布,高值区(>1.12 g/kg)主要分布于东部大清河下游的石子镇、苏家、互助一带,并以此为中心向北和向西逐渐降低,向西南呈现出先逐渐降低至沱江流域后又有所上升的趋势 ...
胡玉福   +4 more
doaj  

不同区域人口密集的乡村景观中土地利用对土壤氮磷的影响

open access: yesShuitu Baochi Xuebao, 2006
基于IKONOS高分辨率(1m)卫星遥感图,结合GIS研究了我国高邑、宜兴、金堂、益阳和电白5个人口密集农村地区(每个地区的研究面积为3km^2)土壤全氮、全磷密度和储量差异,以及各地区土壤全氮、全磷密度和储量在不同土地利用方式下的分布。结果表明:土壤全氮储量在5个地区间的大小顺序依次为金堂(1022.4t)〉宜兴(995.2t)〉益阳(920.4t)〉高邑(804.0t)〉电白(632.4t);土壤全磷大小顺序为宜兴(698.9t)〉高邑(661.3t)〉金堂(618.9t)〉益阳(360.6t ...
焦加国   +3 more
doaj   +2 more sources

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