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Carbon Addition Modified the Response of Heterotrophic Respiration to Soil Sieving in Ectomycorrhizal-Dominated Forests
soil heterotrophic respiration soil sieving intact soil core carbon sequestration microbial community plant functional type
2023/12/1
Soil heterotrophic respiration (Rh) is an important pathway of carbon (C) dioxide release from terrestrial soils to the atmosphere. It is often measured using sieved soil in a laboratory, but the unce...
Species- and Age-Specific Growth Reactions to Extreme Droughts of the Keystone Tree Species across Forest-Steppe and Sub-Taiga Habitats of South Siberia
tree rings drought sensitivity resistance resilience age habitat differences
2023/12/1
Over the coming decades, climate change can decrease forest productivity and stability in many semiarid regions. Tree-ring width (TRW) analysis allows estimation of tree sensitivity to droughts, inclu...
Modelling Soil Organic Carbon as a Function of Topography and Stand Variables
altitude slope crown cover soil organic carbon model accuracy
2023/12/1
Soil organic carbon (SOC) plays a crucial role in global carbon cycling. The amount of SOC is influenced by many factors (climate, topography, forest type, forest disturbance, etc.). To investigate th...
Spatial Variations of Soil N2 and N2O Emissions from a Temperate Forest: Quantified by the In Situ 15N Labeling Method
15N labeling dinitrogen emission in situ N2O/(N2O + N2) ratio temperate forest water gradient
2023/12/1
Emissions of dinitrogen (N2) and nitrous oxide (N2O) from soil are important components of the global nitrogen cycle. Soil N2O emissions from terrestrial ecosystems have been well studied. However, pa...
Duration of Climate Change Mitigation Benefits from Increasing Boreal Forest Harvest Age by 10 Years
composite yield curves carbon curves mitigation benefit stand scale
2023/12/1
We presented a case study and associated method for stand scale assessment of the duration of the climate change mitigation benefit provided by increasing forest harvest age (i.e., the age a stand is ...
Site Quality Classification Models of Cunninghamia Lanceolata Plantations Using Rough Set and Random Forest West of Zhejiang Province, China
Cunninghamia lanceolata plantations site quality classification models site quality evaluation rough set random forest
2023/12/1
The site quality evaluation of plantations has consistently been the focus in matching tree species with sites. This paper studied the site quality of Chinese fir (Cunninghamia lanceolata) plantations...
中国农业科学院农业资源与农业区划研究所研究揭示土地覆被变化对局地温度的影响规律（图）
土地覆被 局地温度 影响规律 森林覆被变化
2023/12/21
近日，中国农业科学院农业资源与农业区划研究所农业遥感团队揭示了土地覆被变化对局地温度影响的纬度差异和不对称性特征。相关研究成果发表在《科学通报（英文版）》（Science Bulletin）上。
光周期对油茶开花及生理特性的影响
油茶 开花 光周期 内源激素
2023/11/29
【目的】为油茶品种的推广及南北引种提供参考。【方法】以温室培养的‘华硕’油茶苗作为研究对象,设置5个光周期处理(8 h/16 h、10 h/14 h、12 h/12 h、14 h/10 h、16 h/8 h),以自然光照作为对照组(CK)。在花芽分化期、现蕾期、初花期及盛花期对各处理组油茶叶片中的叶绿素、可溶性糖、可溶性蛋白、ABA、IAA、GA_(3)及CTK的含量进行检测,并对各处理组油茶的株...
【目的】探究生草栽培对南方红壤区油茶土壤微生物群落结构和稳定性的影响,为油茶林抚育及可持续经营提供理论依据。【方法】对保留自然杂草(TZ)、清耕抚育除草(TF)、间种金鸡菊(TJ)和间种百喜草(TB)的油茶林,用高通量测序法研究土壤微生物群落结构,用Brokenstick、Zipf、Mandelbrot等模型分析不同处理的土壤微生物群落多度格局,用零建模方法推断群落聚集过程,用群落平均变异度评价微...
为培育须根发达、生长旺盛的油茶容器壮苗,以‘大别山1号’油茶容器苗为试验材料,运用盆栽控水试验,比较不同控水处理条件下油茶容器苗成活率、生长量及生理指标的差异。结果表明,油茶容器苗基质持水量控制在70%~90%时,油茶容器苗成活率、生长势和抗逆性较好。本研究结论可以为改进油茶育苗技术和提高油茶造林成活率提供参考。