Stratification of carbon fractions and carbon management index in deep soil affected by the Grain-to-Green Program in China.
Stratification of carbon fractions and carbon management index in deep soil affected by the Grain-to-Green Program in China.
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DOI：
10.1371/journal.pone.0099657
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Ren G
中科院分区：
文献类型：
--
作者：
Zhao F;Yang G;Han X;Feng Y;Ren G
坡耕地转为多年生植被对A层土壤有机碳储量有显著影响。然而，黄土丘陵区深层土壤有机碳及其组分分层的影响仍然知之甚少。对退耕30年的刺槐（Robinia psendoacacia，RP）、柠条（Caragana Korshinskii Kom，CK）和撂荒地（AB）3种典型退耕地进行了采样分析。在0 ~ 200 cm土壤剖面上测定了土壤有机碳（SOC）、全氮（TN）、颗粒态有机碳（POC）和活性有机碳（PGC）的含量及其分层比（SR）和碳管理指数（CMI）。结果表明，在0-10、10-40、40-100和100-200 cm土层，RP的有机碳、全氮、颗粒有机碳和土壤有机碳储量均显著高于SC（P<0.05）。100-200 cm土层分别占土壤有机碳、全氮、颗粒有机碳和总生物量的27.38- 36.62%、25.10- 32.91%、21.59-31.69%和21.08-26.83%。RP、CK和AB的SR值大多>2.0。在100-200 cm土层，RP、CK和AB的CMI值比SC增加了11.61-61.53%，表层和深层土壤有机碳储量与CMI和SR值均呈显著正相关，表明它们是评价土壤质量和碳变化的适宜指标。退耕还绿色工程（GTGP）对退耕地各土层有机碳库的数量和活性均有显著的提高作用，其引起的C循环应考虑深层土壤有机碳的增加。因此，退耕还林是固碳最有效的途径。
Conversion of slope cropland to perennial vegetation has a significant impact on soil organic carbon (SOC) stock in A horizon. However, the impact on SOC and its fraction stratification is still poorly understood in deep soil in Loess Hilly Region (LHR) of China. Samples were collected from three typical conversion lands, Robinia psendoacacia (RP), Caragana Korshinskii Kom (CK), and abandoned land (AB), which have been converted from slope croplands (SC) for 30 years in LHR. Contents of SOC, total nitrogen (TN), particulate organic carbon (POC), and labile organic carbon (LOC), and their stratification ratios (SR) and carbon management indexes (CMI) were determined on soil profiles from 0 to 200 cm. Results showed that the SOC, TN, POC and LOC stocks of RP were significantly higher than that of SC in soil layers of 0–10, 10–40, 40–100 and 100–200 cm (P<0.05). Soil layer of 100–200 cm accounted for 27.38–36.62%, 25.10–32.91%, 21.59–31.69% and 21.08–26.83% to SOC, TN, POC and LOC stocks in lands of RP, CK and AB. SR values were >2.0 in most cases of RP, CK and AB. Moreover, CMI values of RP, CK, and AB increased by 11.61–61.53% in soil layer of 100–200 cm compared with SC. Significant positive correlations between SOC stocks and CMI or SR values of both surface soil and deep soil layers indicated that they were suitable indicators for soil quality and carbon changes evaluation. The Grain-to-Green Program (GTGP) had strong influence on improving quantity and activity of SOC pool through all soil layers of converted lands, and deep soil organic carbon should be considered in C cycle induced by GTGP. It was concluded that converting slope croplands to RP forestlands was the most efficient way for sequestering C in LHR soils.
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DOI：
10.2136/sssaj1992.03615995005600030017x
发表时间：
1992-05-01
影响因子：
2.9
作者：
CAMBARDELLA, CA;ELLIOTT, ET
通讯作者：
ELLIOTT, ET
影响因子：
6.5
作者：
Moreno, F;Murillo, JM;Girón, IF
通讯作者：
Girón, IF
影响因子：
6.5
作者：
Bai, Zhanguo;Dent, David
通讯作者：
Dent, David
影响因子：
3.1
作者：
Cole, CV;Duxbury, J;Zhao, Q
通讯作者：
Zhao, Q
北方黄土高原植被类型对土壤有机碳和全氮的影响
影响因子：
6.1
作者：
Fu, Xiaoli;Shao, Mingan;Horton, Robert
通讯作者：
Horton, Robert