| 添加牛粪对长期不同施肥潮土有机碳矿化的影响及激发效应 |
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| 引用本文： | 戚瑞敏,赵秉强,李娟,林治安,李燕婷,杨相东,李志杰.添加牛粪对长期不同施肥潮土有机碳矿化的影响及激发效应[J].农业工程学报,2016,32(Z2):118-127. |
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| 作者姓名： | 戚瑞敏 赵秉强 李娟 林治安 李燕婷 杨相东 李志杰 |
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| 作者单位： | 中国农业科学院农业资源与农业区划研究所/农业部植物营养与肥料重点实验室,北京,100081 |
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| 基金项目： | 中国农业科学院农业资源与区划研究所中央级公益性科研院所基本科研业务费专项资金（IARRP-2016）；国家自然科学基金项目（31301843）。 |
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| 摘 要： | 为了探讨长期不同施肥潮土有机碳矿化对添加牛粪的响应特征及添加牛粪对长期不同施肥潮土有机碳矿化的激发效应,以始建于1986年的长期定位试验为平台,通过室内恒温培养的方法研究添加等氮量牛粪后长期不同施肥(不施肥,CK;常量有机肥,SMA;常量化肥,SMF;常量有机无机配施,1/2(SMA+SMF))潮土有机碳矿化、土壤有机碳及活性碳库组分(微生物量碳、可溶性有机碳、颗粒有机碳和易氧化有机碳)含量的变化特征。结果表明:无论添加牛粪与否,长期不同施肥潮土有机碳矿化过程均符合一级动力学方程,而牛粪的添加显著增加了长期不施肥、长期单施化肥和长期有机无机配施土壤的有机碳矿化速率常数,增长幅度分别为21.74%、35.00%和45.00%;添加牛粪提高了长期不同施肥潮土有机碳、微生物量碳、颗粒有机碳和易氧化有机碳含量,却显著降低了可溶性有机碳含量;牛粪对长期不施肥、长期施用常量有机肥、常量化肥和常量有机无机配施潮土有机碳矿化的正激发效应分别达到了48.56%、3.60%、48.43%和3.92%,且对长期不施肥及长期施用常量化肥潮土的激发效应显著高于对长期施用常量有机肥及长期有机无机配施土壤;冗余分析显示添加牛粪对长期不同施肥土壤有机碳矿化的激发效应与土壤活性组分碳氮比呈正相关,与土壤养分含量呈负相关。该研究不仅为合理施用有机肥和实现农田生态系统的可持续发展提供理论依据,还有利于实现农业资源再利用及其效益最大化。
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| 关 键 词： | 有机碳 化肥 牛粪 有机碳矿化 激发效应 |
| 收稿时间： | 2016/8/26 0:00:00 |
| 修稿时间： | 2016/9/23 0:00:00 |
Effects of cattle manure addition on soil organic carbon mineralization and priming effects under long-term fertilization regimes |
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| Qi Ruimin,Zhao Bingqiang,Li Juan,Lin Zhian,Li Yanting,Yang Xiangdong and Li Zhijie.Effects of cattle manure addition on soil organic carbon mineralization and priming effects under long-term fertilization regimes[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(Z2):118-127. |
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| Authors: | Qi Ruimin Zhao Bingqiang Li Juan Lin Zhian Li Yanting Yang Xiangdong and Li Zhijie |
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| Institution: | Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China,Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China,Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China,Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China,Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China,Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China and Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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| Abstract: | Abstract: The mineralization of soil organic carbon (SOC) is an important part of carbon cycle in the terrestrial ecosystem, and it is directly related to the nutrient cycling and utilization in the soil, crop productivity, greenhouse gases emission, and SOC storage and so on. It is reported that the SOC mineralization is significantly affected by the environmental factors such as different fertilization practices, the exogenous organic matter addition and so on, and even small changes of it can lead to higher impact on the dynamics of soil ecosystems. In order to reveal the responses of cattle manure addition on the mineralization and the priming effects under long-term fertilization regimes, an incubation experiment was conducted to investigate the effects of equal rate of cattle manure addition on the mineralization of SOC and contents of soil labile organic carbon fractions (microbial biomass carbon, MBC; dissolved organic carbon, DOC; particulate organic carbon, POC; and easily oxidizable carbon, EOC) in the long-term fertilizer trial (control of no-fertilizer, CK; standard rate of organic manure treatment, SMA; standard rate of mineral fertilizer treatment, SMF; half-standard rate of organic manure plus half-standard rate of mineral fertilizer treatment,1/2(SMA+SMF)), which were established in 1986 in Yucheng site, Shandong province, China. During incubation, soil moisture was adjusted to 60% of the field capacity with deionized water, and the fresh soil sample (equal to 100 g dry soil), adding cattle manure or not, was placed into a 500 mL wide-mouthed bottle that sealed with a rubber plug and was incubated in the dark for 79 d. The bottle plug was opened for gas exchange at regular intervals, and the soil moisture was adjusted gravimetrically with deionized water to maintain 60% field capacity. We determined soil chemical properties and labile organic carbon fractions using standard methods and the SOC mineralization by collecting gas at regular intervals in a 79 d incubation experiment. Additionally, we investigated the relationships between priming effects of soil organic carbon mineralization among different fertilized soils with cattle manure addition and soil nutrients with redundancy analysis (RDA). The results showed that the curve of accumulative mineralization amounts of SOC in the different fertilizer-treated soils were fitting with first-order kinetical equation, and the SOC mineralization rate constants in CK, SMF and 1/2(SMA+SMF) with cattle manure addition increased 21.74%, 35.00% and 45.00%, respectively; and the positive priming effects in CK and SMF treatments with cattle manure addition were 48.56% and 48.43%, much higher than those in the SMA and 1/2(SMA+SMF) treatments. Moreover, cattle manure addition significantly increased the contents of SOC, MBC, POC and EOC, but significantly reduced DOC content. Redundancy analysis showed that the priming effects of SOC mineralization in long-term fertilized soils with cattle manure addition had significantly positive correlations with the ratios of soil organic carbon and nitrogen fractions contents, but had significantly negative correlations with the soil nutrient contents (SOC; total nitrogen; available phosphorus, available potassium). In conclusion, this study is beneficial to achieving the maximum benefits of agricultural resources and applying organic fertilizer reasonably, which provides a theoretical basis for sustainable development of farmland ecosystem. |
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| Keywords: | organic carbon chemical fertilizer cattle manure soil organic carbon miner priming effects |
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