Sensitivity of soil organic carbon stocks and fractions to soil surface mulching in semiarid farmland
Sensitivity of soil organic carbon stocks and fractions to soil surface mulching in semiarid farmland
复制标题
半干旱农田土壤有机碳储量和组分对土壤表面覆盖的敏感性
DOI：
10.1016/j.ejsobi.2015.01.004
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发表时间：
2015-03-01
影响因子：
4.2
通讯作者：
Li, Shiqing
中科院分区：
文献类型：
--
作者：
Luo, Shasha;Zhu, Lin;Li, Shiqing
关于塑料薄膜和砾石覆盖对中国西北半干旱地区土壤有机碳（SOC）库和不稳定部分的影响的信息很少。基于长武农业生态试验站4年春玉米田间试验，对0-20 cm和20-40 cm层的SOC库、不稳定SOC库和C管理指数（CMI）进行了分析。三种处理包括不覆盖（CK）、砾石覆盖（GM）和塑料薄膜覆盖（FM）。 4年后，与初始SOC库相比，GM下20-40 cm层的SOC库减少了0.97 Mg C hm(-2)，而FM下的SOC库增加了1.14 Mg C hm(-2)。在 0-40 cm 层，GM 下的 SOC 储量显着下降，而 FM 下的 SOC 表现出一定的增加趋势。与 CK 相比，FM 处理显着增加了轻馏分有机碳 (LFOC) 含量（密度
There is little information regarding the impact of plastic film and gravel mulching on soil organic carbon (SOC) stocks and labile fractions in semiarid areas of northwest China. Based on a 4-year spring maize (Zea mays L.) field experiment at Changwu Agricultural and Ecological Experimental Station, we analyzed the SOC stock, labile SOC pools and the C management index (CMI) in the 0-20 cm and 20-40 cm layers. The three treatments included non-mulched (CK), gravel-mulched (GM) and plastic film-mulched (FM). After the 4-year duration, compared with the initial SOC stock, the SOC stock under GM decreased 0.97 Mg C hm(-2) whereas under FM increased 1.14 Mg C hm(-2) in the 20-40 cm layer. Across the 0-40 cm layer, the SOC stock under GM significantly decreased, whereas under FM demonstrated some tendency to increase. In contrast to the CK, the FM treatment significantly increased light fraction organic C (LFOC) content (density