本文選題：碳氮磷 + 生態(tài)化學(xué)計(jì)量�。� 參考：《生態(tài)學(xué)報(bào)》2017年18期

【摘要】：解析區(qū)域土壤碳氮磷元素的生態(tài)化學(xué)計(jì)量特征的空間分異格局有助于土壤養(yǎng)分的綜合管理與利用。運(yùn)用傳統(tǒng)統(tǒng)計(jì)學(xué)和地統(tǒng)計(jì)學(xué)分析方法,以河北省為例分析了中溫-暖溫帶表土(0—30cm)碳氮磷元素的生態(tài)化學(xué)計(jì)量特征的空間變異性及影響因素。結(jié)果顯示:(1)土壤有機(jī)碳(SOC)、全氮(TSN)、全磷(TSP)其摩爾比率的變異系數(shù)均介于0.1—1之間,表明其在空間上存在中等程度的變異性。此外,C∶N的變異系數(shù)較小,表明C∶N較穩(wěn)定。(2)表土TSP和C∶N具有小范圍、強(qiáng)烈的空間自相關(guān)性,SOC、TSN、C∶P和N∶P具有較大范圍、中等程度的空間自相關(guān)性,結(jié)構(gòu)性因素是土壤碳氮磷含量及其摩爾比率空間變異的主要影響因素。從空間分布規(guī)律來(lái)看,表土碳氮磷含量及其摩爾比率均沒(méi)有呈現(xiàn)明顯的遞增或遞減的變化規(guī)律,SOC、TSN、C∶P和N∶P具有相同的空間分布趨勢(shì),高值區(qū)主要分布在冀北地區(qū),分布面積較小,低值區(qū)分布范圍較廣;C∶N的高值區(qū)零星分布在冀北地區(qū),TSP的高值區(qū)和低值區(qū)呈現(xiàn)斑塊狀分布。(3)土壤C∶N、C∶P和N∶P受到土壤理化性狀、土地利用方式、人類擾動(dòng)、氣候及地形等因素的調(diào)控。此外,不同氣候帶的C∶N、C∶P和N∶P也存在一定的差異,研究區(qū)土壤C∶N與高寒帶較接近,同時(shí)與其他氣候帶沒(méi)有顯著的差異;C∶P和N∶P與溫帶沙漠區(qū)較接近,與其余氣候帶存在顯著的差異性,說(shuō)明不同氣候帶之間的C∶N較C∶P和N∶P穩(wěn)定。
[Abstract]:The spatial differentiation pattern of the ecological stoichiometric characteristics of soil carbon, nitrogen and phosphorus is helpful to the comprehensive management and utilization of soil nutrients. Taking Hebei Province as an example, the spatial variability and influencing factors of the ecostoictic characteristics of carbon, nitrogen and phosphorus were analyzed by using traditional statistics and geostatistical analysis. The results showed that the molar ratios of soil organic carbon (SOC), total nitrogen (TSNN) and total phosphorus (TSPs) ranged from 0.1 to 1, indicating that there was a moderate degree of variability in the soil organic carbon (SOC), total nitrogen (TSNN) and total phosphorus (TSPs). In addition, the coefficient of variation of C: n is smaller, indicating that the surface soil TSP and C: n have a small range, and the strong spatial autocorrelation between them has a large range and moderate degree of spatial autocorrelation. Structural factors are the main factors influencing the spatial variation of soil carbon, nitrogen and phosphorus content and their molar ratio. From the point of view of spatial distribution law, there is no obvious increasing or decreasing trend of carbon, nitrogen and phosphorus content and molar ratio of topsoil. The high value area is mainly distributed in the north of Hebei Province. The ratio of TSNC: P to N: P is the same as that of N: P, and the high value area is mainly distributed in the north of Hebei Province. The distribution area of low value area was wider than that of low value area. The high value area of C: n distributed sporadically in the high value area and low value area of tsp in the north of Hebei Province. The soil C: n (C: P) and N: P were subjected to soil physical and chemical properties and land use mode. The regulation of human disturbance, climate and topography. In addition, there are also some differences between C: n: C: P and N: P in different climatic zones. In the study area, soil C: n is close to the alpine zone, while there is no significant difference from other climatic zones. C: P and N: P are close to temperate desert. There is a significant difference from the other climatic zones, indicating that C: n is more stable than that of C: P and N: P in different climatic zones.
【作者單位】： 中國(guó)農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所農(nóng)業(yè)部面源污染控制重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院亞熱帶農(nóng)業(yè)生態(tài)研究所;中科院地理科學(xué)與資源研究所;The
【基金】：國(guó)家自然基金(31572208) 寧夏回族自治區(qū)土系調(diào)查與土系志編制(2014FY110200A07) 國(guó)家留學(xué)基金資助
【分類號(hào)】：S153
，

本文編號(hào)：1979088