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首页> 外文期刊>Plant and Soil >Estimating C inputs retained as soil organic matter from corn (Zea Mays L.)
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Estimating C inputs retained as soil organic matter from corn (Zea Mays L.)

机译：估算从玉米中保留为土壤有机质的碳输入（Zea Mays L.）

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The proportion of maize residue retained as soil organic matter (SOM) was estimated using the results of a 13C long-term (15 years) field study conducted on continuous silage maize and two silage maize rotations in Quebec, Canada, along with data from the existing literature. The total amount of maize-derived C (0-30 cm) was～2.5 to 3.0 times higher for the continuous maize treatment (445 gthinm-2), compared to the two rotational treatments (175 and 133 gthinm-2 for the maize-barley-barley-wheat and maize-underseeded barley hay-hay rotations, respectively). Assuming that the C inputs to the soil from silage-maize was mainly roots and would have been similar across treatments on an annual basis, the total amount of maize-derived C for the two rotational treatments was approximately proportional to the number of years the silage-maize was present in the rotation (4 years). The results from the current study indicate that～17% of root-derived C is retained as SOM. This value is higher than those reported in the literature for long-term studies on shoot-derived C (range of 7.7 to 20%, average of 12.2%), which is in agreement with previous studies showing that more C is retained as SOM from roots than from shoots.
机译：根据加拿大魁北克连续青贮玉米和两次青贮玉米轮作的13C长期（15年）田间研究的结果，估算了保留为土壤有机质（SOM）的玉米残渣的比例。现有文献。与两个轮作处理（175和133 gthinm-2）相比，连续玉米处理（445 gthinm-2）的玉米衍生碳总量（0-30 cm）高约2.5至3.0倍，大麦，大麦小麦和玉米播种的大麦干草和干草轮作。假设青贮玉米向土壤的碳输入主要是根，并且每年不同处理之间的碳输入相似，那么两次轮作处理中源自玉米的碳总量大致与青贮年数成正比。 -玉米出现在轮作中（4年）。目前的研究结果表明，约有17％的根源C被保留为SOM。该值高于文献中关于芽衍生C的长期研究的报道值（范围为7.7至20％，平均值为12.2％），这与以前的研究一致，后者表明从S中保留了更多的C作为SOM。根比从芽。

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