Soil organic carbon fractions and management index after 20 yr of manure and fertilizer application for greenhouse vegetables
Soil organic carbon fractions and management index after 20 yr of manure and fertilizer application for greenhouse vegetables
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DOI：
10.1111/j.1475-2743.2010.00325.x
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发表时间：
2011-06
影响因子：
3.8
通讯作者：
Y. Lou;M. Xu;W. Wang;X. Sun;C. Liang
中科院分区：
文献类型：
--
作者：
Y. Lou;M. Xu;W. Wang;X. Sun;C. Liang
在中国东北的一个温室蔬菜系统下进行了为期20年的田间试验，研究了有机肥和无机肥对表层土壤（0 - 20厘米）中总有机碳（CT）、水溶性有机碳（CWS）、微生物生物量碳（CMB）、颗粒有机碳（CP）、活性有机碳（CL）、碳储量与固存以及碳管理指数（CMI）的影响。处理包括不施肥对照（CK）、氮肥（N）、平衡氮磷钾肥料（NPK）、单施有机肥（M）以及氮磷钾肥料与有机肥配施（MNPK）。在N和NPK处理下，试验期间CT含量和碳储量没有显著变化，而与不施肥对照相比，CWS、CMB、CP、CL浓度和CMI显著增加。与对照相比，有机肥处理M和MNPK显著增加了CT含量和碳储量，分别固存有机碳8.9和9.2 Mg/ha。M和MNPK处理比其他三种处理表现出更高的CWS、CMB、CP和CL浓度以及CMI。皮尔逊相关系数表明，CWS、CMB、CP、CL和CMI可作为评估土壤质量和总碳变化的有用指标。M处理在固存土壤碳方面有效，但与NPK处理相比作物产量较低。MNPK处理在温室蔬菜系统中作物产量和碳固存的增加最为显著。
Impacts of organic manure and inorganic fertilizer on total organic carbon (CT), water‐soluble organic C (CWS), microbial biomass C (CMB), particulate organic C (CP), labile organic C (CL), C storage and sequestration, and C management index (CMI) in surface soil (0–20 cm) were investigated in a 20‐yr field experiment under a greenhouse vegetable system in northeast China. The treatments included unfertilized control (CK), N fertilizer (N), balanced NPK fertilizer (NPK), organic manure alone (M) and the NPK fertilizer combined with the manure (MNPK). Under the treatments of N and NPK, CT content and C storage were not significantly changed over the experimental period, while CWS, CMB, CP, CL concentrations and CMI were significantly increased compared with the unfertilized control. In comparison with the control, the manure treatments, M and MNPK, significantly increased CT content and C storage, sequestrating organic C of 8.9 and 9.2 Mg/ha, respectively. The M and MNPK treatments showed higher CWS, CMB, CP and CL concentrations and CMI than the other three treatments. Pearson’s correlation coefficients were used to show that CWS, CMB, CP, CL and CMI could be useful indicators for assessing soil quality and total C changes. The M treatment is effective in sequestrating soil C, but resulted in lower crop yield compared with the NPK treatment. The MNPK treatment showed the greatest increases in crop yield and C sequestration in the greenhouse vegetable system.