التفاصيل البيبلوغرافية
| العنوان: |
等碳量不同有机物料添加对红壤团聚体组分分布 及有机碳、氮含量的影响. (Chinese) |
| Alternate Title: |
Effects of Equal Carbon Input Conditions of Different Organic Materials on the Distribution of Aggregates and Their Content of Organic Carbon and Nitrogen in Red Soil. (English) |
| المؤلفون: |
吴艳, 宋惠洁, 胡丹丹, 徐小林, 胡志华, 冀建华”, 黄尚书, 黄建清', 柳开楼 |
| المصدر: |
Journal of Ecology & Rural Environment; Apr2024, Vol. 40 Issue 4, p556-564, 9p |
| Abstract (English): |
Due to the different in soil physicochemical properties, the suitable types of organic materials may vary on red soil with different fertility levels. To precisely guide the classification and selection of appropriate organic materials for red soils of different fertility levels, soil samples were collected from peanut and rapeseed intercropping red soils under long-term rotation. Soil samples were taken at depths of 0-20 and >20-40 cm, representing high fertility soil and low fertility soil, respectively. Five treatments were established, including no organic carbon (CO), rapeseed straw carbon (OSC), rice straw carbon (RSC), maize straw carbon (MSC), and pig manure carbon (PMC). The carbon input for each organic material treatment was the same. The samples were subjected to continuous incubation in the dark for 90 days, and the different treatments were analyzed for aggregate composition and soil organic carbon (SOC) and total nitrogen (TN) content. The relationship between the C/N ratio of organic material input and the C/N ratio of aggregate components was analyzed. The results indicate that: (1) Compared with the CO control, all organic material treatments significantly increased the proportion of >2 mm aggregates. In high fertility soils, the proportions of >2 mm aggregate components increased by 217.89%, 283.97%, 286. 63%, and 210. 63% with OSC, RSC, MSC, and PMC treatments, respectively. In low fertility soils, the increases for the above treatments were 72. 25%, 84.45%, 72. 11%, and 46.47%, respectively. (2) After organic material inputs, the organic carbon content of >2, >0.25-2, ≥0.053-0.25, and <0.053 mm aggregate components all significantly increased. However, there were significant differences in the increase of organic carbon content among aggregate components under different organic material treatments in soils with different fertility levels. For example, in >2 mm aggregate components, RSC and MSC treatments showed higher values in high fertility soils, while OSC treatment exhibited higher values in low fertility soils. (3) Adding different organic materials significantly increased the TN content of >0.25-2 and <0.053 mm aggregate components in both high and low fertility soils, with PMC treatment generally showing the highest trend among treatments. (4) Organic material inputs increased the C/N ratio of aggregate components in both high and low fertility soils, but there were obvious differences between them. For example, in >0.25-2 mm aggregate components, OSC, RSC, and MSC treatments showed higher values in high fertility soils, while RSC and MSC treatments exhibited higher values in low fertility soils. Moreover, the trend generally showed that the C/N ratio of soil aggregate components under PMC treatment was significantly lower than that under other organic material treatments. (5) In high fertility soils, increasing the C/N ratio of organic materials significantly increased the C/N ratio of >2 and >0.25-2 mm aggregate components. In low fertility soils, only the C/N ratio of >0.25-2 mm aggregate showed a significant positive correlation with the C/N ratio of organic material inputs. Analysis of the slope of the fitted equations reveals that when the C/N ratio of organic material inputs increased by 1 unit, the increase in the C/N ratio of >0. 25-2 mm aggregate components was significantly smaller in high fertility soils than in low fertility soils. Compared with pig manure, straw-type organic materials showed better promotion effects on aggregate carbon and nitrogen accumulation. It is suggested to accurately adjust the C/N ratio of organic material inputs according to soil fertility levels to effectively improve the C/N ratio of soil aggregate components [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
由于土壤理化性质不同,不同肥力的红壤上适宜的有机物料种类可能存在差异. 为精准分类指导不同肥 力红壤选择适宜的有机物料种类,选择长期进行花生, 油菜轮作的红壤旱地,采集0~20和>20~40cm深度土壤样 品,分别代表高肥力和低肥力土壤,设置不施有机碳(CO)以及施用油菜秸秆碳(OSC), 水稻秸秆碳(RSC), 玉米秸 秆碳(MSC), 猪粪碳(PMC)处理,其中各有机物料处理的碳投入量相同,进行连续90d的避光培养,测定不同处理 团聚体组分及有机碳, 氮含量,分析有机物料投入C/N比与团聚体组分C/N比的相关关系. 结果表明:(1)与CO 对照相比,各有机物料处理均显著提高了>2mm团聚体比例. 在高肥力土壤中,OSC, RSC, MSC和PMC处理>2 mm 团聚体组分比例分别增加217.89% 283.97%, 286.63%和210.63%,低肥力土壤中上述处理的增幅分别为 72.25% 84.45%, 72.11%和46.47%. (2)有机物料投入后,>2, >0.25-2,≥0.053-0.25和<0.053mm团聚体组 分有机碳含量均显著提升,但不同肥力土壤中各有机物料处理下团聚体组分有机碳的增幅差异较大,以>2mm团 聚体组分有机碳为例,高肥力土壤表现为RSC和MSC处理较高,而低肥力土壤则表现为OSC处理较高. (3)高肥 力和低肥力土壤中添加不同有机物料均显著增加了>0.25-2和<0.053mm团聚体组分全氮含量,且各处理均大 体呈现出 PMC 处理最高的趋势. (4)在高肥力和低肥力土壤中添加不同有机物料均增加了团聚体组分C/N比, 但高肥力和低肥力土壤中存在明显分异. 以>0.25-2mm团聚体组分C/N比为例,高肥力土壤表现为OSC, RSC 和 MSC 处理较高;而低肥力土壤则表现为RSC和MSC处理较高,且大体呈现出PMC处理下土壤团聚体组分 C/N 比显著低于其他有机物料处理的趋势. (5)高肥力土壤中,提高有机物料C/N比可显著增加土壤>2和>0.25-2 mm 团聚体组分 C/N比;而低肥力土壤中,仅>0.25-2mm团聚体组分C/N比与有机物料投入C/N比呈显著正相 关. 结合拟合方程的斜率分析发现,当投入有机物料的C/N比增加时,高肥力土壤中>0.25-2mm 团聚体组分C/ N比的增幅明显小于低肥力土壤. 与猪粪相比,秸秆类有机物料对团聚体碳, 氮积累的促进效果较好. 建议参考 土壤肥力水平精准调控投入有机物料的C/N比,以期合理提升土壤团聚体组分的C/N比. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
