长期施肥处理下不同类型水稻土有机碳矿化的动态差异

doi:10.3864/j.issn.0578-1752.2016.09.007

摘要/Abstract

摘要： 【目的】研究田间长期定位施肥处理下不同类型水稻土有机碳矿化的动态差异及其影响因素，为揭示不同类型水稻土有机碳的循环特征及制定合理的养分管理措施等提供依据。【方法】以江苏常熟（乌栅土）、江西余江（低肥力红壤）、湖南望城（高肥力红壤）和重庆（紫色土）4个地点长期定位施肥试验的水稻土为研究对象，选择不施肥（CK）、单施化肥（NPK）和化肥配合秸秆还田（NPKS）3个处理，通过室内27 d的有机碳矿化培养试验，采用室内恒温培养、碱液吸收法测定土壤有机碳的矿化量；选择Jones一级动力学方程拟合土壤有机碳累积矿化量的动态变化，比较土壤类型和长期不同施肥处理对有机碳矿化动态的影响。【结果】长期施肥处理可以提高土壤全量养分（全氮、全磷、全钾）和有机碳含量，但会降低土壤pH。长期施肥可以显著提高土壤有机碳累积矿化量（C）（常熟试验点除外），不同施肥处理下增加幅度为11.7%—86.1%，而对于矿化动力学方程拟合所得土壤潜在可矿化有机碳量（C0）、易矿化有机碳量（C1），只有同为红壤的余江和望城两地的施肥处理可以显著提高。相同施肥处理下C、C0和C1均表现为常熟、望城试验点的较大，重庆、余江试验点的较小，而潜在可矿化有机碳量与土壤有机碳的比值（C0/SOC）则是余江试验点较大；相关性分析发现有机碳、总氮、碱解氮、全磷与C、C0和C1呈极显著正相关（P＜0.01），pH和全钾与C呈极显著负相关，而C0/SOC与有机碳、pH和各养分指标均呈显著或极显著负相关。对于矿化速率常数（k），施肥处理对其影响并不显著，但不同土壤类型可以显著影响k。相关性分析表明k与pH、C/N和全钾呈极显著负相关（P＜0.01），与速效钾呈显著负相关（P＜0.05）。通过聚合推进树（ABT）方法分析了不同因子的相对影响，结果表明碱解氮和有机碳含量对C和C0影响较大，相对贡献率分别为23.8%、20.2%（对于C）和29.5%、23.7%（对于C0）；有机碳含量和pH对C1和C0/SOC影响最大，相对贡献率分别为26.7%、15.9%（对于C1）和34.4%、23.0%（对于C0/SOC）；pH和全钾对k的影响最大，相对贡献率分别为34.2%和22.1%。【结论】土壤类型对有机碳矿化动态的影响要大于长期施肥措施产生的影响，不同地点长期定位施肥处理下土壤母质、pH、有机碳含量和养分含量等土壤性质的不同，造成了土壤有机碳矿化的动态差异。

关键词: 长期定位施肥, 有机碳矿化, 动力学方程, 聚合推进树, 相对贡献

Abstract: 【Objective】The objective of this study is to explore dynamic differences and influence factors of organic carbon mineralization in different types of paddy soil under long-term located fertilization. The results could help us to illuminate the characteristics of organic carbon mineralization in different types of paddy soil and provide guidance for formulating reasonable nutrient management measures.【Method】In this study, the paddy soils in four different places were used, including Changshu (gleyed soils) in Jiangsu province, Yujiang (reddish soil of low fertility) in Jiangxi province, Wangcheng (reddish soil of high fertility) in Hunan province, and Chongqing (purple soil). The soils were collected in long-term fertilization location including three different treatments, as control (no fertilizer, CK), N, P and K fertilizer (NPK), N, P and K fertilizer plus rice straw (NPKS). The organic carbon mineralization laboratory incubation experiment was conducted in 27 days. The cumulative carbon mineralization was measured through alkali absorption method in constant incubator. The Jones first-order kinetic model was used to express the dynamics of cumulative carbon mineralization with respect to incubation time and was fitted to compare the influence of soil type and different applications of long-term fertilization on the dynamics of carbon mineralization.【Result】Long-term fertilization could improve the content of soil total N, P, K and organic carbon but decreased the soil pH. Long-term fertilization could significantly improve the cumulative carbon mineralization (C) except Changshu soil and different fertilizations caused the increase of 11.7%-86.1%. Two parameters in mineralization kinetic equation, potential mineralization of organic carbon (C0) and easy mineralization of organic carbon (C1), could be significantly improved by fertilization in the reddish paddy soil of Yujiang and Wangcheng. In the same fertilization treatment, C, C0 and C1 were bigger in Changshu and Wangcheng while smaller in Chongqing and Yujiang; Ratio of C0 to soil organic carbon (C0/SOC) was bigger in Yujiang. Correlation analysis indicated that soil organic carbon, total nitrogen, available nitrogen and total phosphorus showed a very significant positive correlation with C, C0 and C1 (P＜0.01); pH and total potassium showed a very significant negative correlation with C; C0/SOC showed a significant negative correlation with SOC, pH and all nutrient indexes. The fertilization treatments had no significant effect on mineralization rate constant (k) while the soil type affected k significantly. The k displayed a very significant negative correlation with pH, C/N, total K (P＜0.01) and a significant negative correlation with available K (P＜0.05). The relative influence of different parameters was obtained through aggregated boosted trees and the result showed that available nitrogen and soil organic carbon had a bigger impact on C and C0 with relative influence at 23.8%, 20.2% (for C) and 29.5%, 23.7% (for C0); soil organic carbon and pH had a bigger impact on C1 and C0/SOC with relative influence at 26.7%, 15.9% (for C1) and 34.4%, 23.0% for (C0/SOC); pH and total potassium had a bigger impact on mineralization rate constant (k) with relative influence at 34.2% and 22.1%, respectively.【Conclusion】The type of soil exerted a bigger impact on soil organic carbon mineralization dynamic than long-term located fertilization. The difference of parent material, pH, organic carbon and nutrient content of soil in different long-term fertilization locations account for the dynamic difference of organic carbon mineralization.

Key words: long-term located fertilization, organic carbon mineralization, kinetic equation, aggregated boosted trees, relative influence

吴萌，李忠佩，冯有智，陈瑞蕊，江春玉，刘明. 长期施肥处理下不同类型水稻土有机碳矿化的动态差异[J]. 中国农业科学, 2016, 49(9): 1705-1714.

WU Meng, LI Zhong-pei, FENG You-zhi, CHEN Rui-rui, JIANG Chun-yu, LIU Ming. Dynamic Differences of Organic Carbon Mineralization in Different Types of Paddy Soil Under Long-Term Located Fertilization[J]. Scientia Agricultura Sinica, 2016, 49(9): 1705-1714.

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参考文献

[1] 李忠佩, 张桃林, 陈碧云. 可溶性有机碳的含量动态及其与土壤有机碳矿化的关系. 土壤学报, 2004, 41(4): 544-552.

Li Z P, Zhang T L, Chen B Y. Dynamics of soluble organic carbon and its relation to mineralization of soil organic carbon. Acta Pedologica Sinica, 2004, 41(4): 544-552. (in Chinese)

[2] 陈亮中, 谢宝元, 肖文发, 黄志霖. 三峡库区主要森林植被类型土壤有机碳贮量研究. 长江流域资源与环境, 2007, 15(5): 640-643.

Chen L Z, Xie B Y, Xiao W F, Huang Z L. Organic carbon storage in soil under the major forest vegetation types in the three gorges reservoir area. Resources and Environment in the Yangtze Basin, 2007, 15(5): 640-643. (in Chinese)

[3] Kirschbaum M U F. The temperature dependence of soil organic matter decomposition, and the effect of global warming on soil organic C storage. Soil Biology and Biochemistry, 1995, 27(6): 753-760.

[4] 黄东迈, 朱培立. 旱地和水田有机碳分解速率的探讨与质疑. 土壤学报, 1998, 35(4): 482-492.

Huang D M, Zhu P L. Discussion and questioning of organic carbon decomposition rate in paddy and upland Acta Pedologica Sinica, 1998, 35(4): 482-492. (in Chinese)

[5] 林心雄, 文启孝, 徐宁. 广州地区土壤中植物残体的分解速度. 土壤学报, 1985, 22(1): 47-55.

Lin X X, Wen Q X, Xu N. The decomposition rate of plant residue in the soil of Guangzhou. Acta Pedologica Sinica, 1985, 22(1): 47-55. (in Chinese)

[6] Parton W J, Schimel D S, Cole C V, Ojima D S. Analysis of factors controlling soil organic matter levels in Great Plains grasslands. Soil Science Society of America Journal, 1987, 51: 1173-1179.

[7] 马力, 杨林章, 肖和艾, 夏立忠, 李运东, 刘晓春. 施肥和秸秆还田对红壤水稻土有机碳分布变异及其矿化特性的影响. 土壤, 2011, 43(6): 883-890.

Ma L, Yang L Z, Xiao H A, Xia L Z, Li Y D, Liu X C. Effects of fertilization and straw returning on distribution and mineralization of organic carbon in paddy soils in subtropical China. Soil, 2011, 43(6): 883-890. (in Chinese)

[8] 郝瑞军, 李忠佩, 车玉萍. 苏南水稻土有机碳矿化特征及其与活性有机碳组分的关系. 长江流域资源与环境, 2010, 19(9): 1069-1073.

Hao R J, Li Z P, Che Y P. Characteristic of soil organic carbon mineralization and its relationship with active organic carbons in paddy soils of southern Jiangsu province. Resources and Environment in the Yangtze Basin, 2010, 19(9): 1069-1073. (in Chinese)

[9] 鲁如坤. 土壤农业化学分析方法. 北京: 中国农业科学技术出版社, 1999.

Lu R K. Analytical Methods for Soil and Agruicutral Chemistry. Beijing: China Agricultural Science and Technology Press, 1999. (in Chinese)

[10] 文启孝. 土壤有机质研究法. 北京: 农业出版社, 1984.

Wen Q X. Methods for Soil Organic Matter Studies. Beijing: Agriculture Press, 1984. (in Chinese)

[11] Jones C A. Estimation of an active fraction of soil nitrogen. Communications in Soil Science and Plant Analysis, 1984, 15: 23-32.

[12] De’ath G. Boosted trees for ecological modelling and prediction. Ecology, 2007, 88(1): 243-251.

[13] Riffaldi R, Saviozzi A, Levi-Minzi R. Carbon mineralization kinetics as influenced by soil properties. Biology and Fertility of Soils, 1996, 22(4): 293-298.

[14] Murwira H, Kirchmann H, Swift M. The effect of moisture on the decomposition rate of cattle manure. Plant and Soil, 1990, 122(2): 197-199.

[15] Chen X N, Wang X D, Liebman M, Cavigelli M, Wander M. Influence of residue and nitrogen fertilizer additions on carbon mineralization in soils with different texture and cropping histories. PloS One, 2014, 9(7): e103720.

[16] 陈吉, 赵炳梓, 张佳宝, 沈林林, 张辉, 钦绳武. 长期施肥潮土在玉米季施肥初期的有机碳矿化过程研究. 土壤, 2009, 41(5): 719-725.

Chen J, Zhao B Z, Zhang J B, Shen L L, Zhang H, Qin S W. Research on process of fluvo-aquic soil organic carbon mineralization in initial stage of maize growth under long-term different fertilization. Soil, 2009, 41(5): 719-725. (in Chinese)

[17] Rollwagen B A, Zasosski R J. Nitrogen source effects on rhizosphere pH and nutrient accumulation by Pacific Northwest conifers. Plant and Soil, 1988, 105: 792-861.

[18] Tarkalson D D, Payero J O, Hergert G W, Cassman K G. Acidification of soil in a dry land winter wheat-sorghum/corn-follow rotation in the semiard U.S. Great Plains. Plant and Soil, 2006, 283: 367-379.

[19] 张永春, 汪吉东, 沈明星, 沈其荣, 许仙菊, 宁运旺. 长期不同施肥对太湖地区典型土壤酸化的影响. 土壤学报, 2010, 47(3): 466-472.

Zhang Y C, Wang J D, Shen M X, Shen Q R, Xu X J, Ning Y W. Effect of long-term fertilization on soil acidication in Taihu Lake region, China. Acta Pedologica Sinica, 2010, 47(3): 466-472. (in Chinese)

[20] Zhang H M, Wang B R, Xu M G .Effects of inorganic fertilizer inputs on grain yields and soil properties in a long-term wheat-corn cropping system in South China. Communications in Soil Science and Plant Analysis, 2008, 39: 1583-1599.

[21] 王伯仁, 徐明岗, 文石林. 长期不同施肥对旱地红壤性质和作物生长的影响. 水土保持学报, 2005, 19(1): 97-100.

Wang B R, Xu M G, Wen S L. Effect of long time fertilizers application on soil characteristics and crop growth in red soil upland. Journal of Soil and Water Conservation, 2005, 19(1): 97-100. (in Chinese)

[22] 李梦雅, 王伯仁, 徐明岗, 李桂花, 孙楠, 张文菊. 长期施肥对红壤有机碳矿化及微生物活性的影响. 核农学报, 2009, 23(6): 1043-1049.

Li M Y, Wang B R, Xu M G, Li G H, Sun N, Zhang W J. Effect of long-trem fertilization on mineralization of organic carbon and micriobial activity in red soil. Journal of Nuclear Agricultural Sciences, 2009, 23(6): 1043-1049. (in Chinese)

[23] 李顺姬, 邱莉萍, 张兴昌. 黄土高原土壤有机碳矿化及其与土壤理化性质的关系. 生态学报, 2010, 30(5): 1217-1226.

Li S J, Qiu L P, Zhang X C. Mineralization of soil organic carbon and its relations with soil physical and chemical properties on the Loess Plateau. Acta Ecologica Sinica, 2010, 30(5): 1217-1226. (in Chinese)

[24] 尹云锋, 蔡祖聪. 不同类型土壤有机碳分解速率的比较. 应用生态学报, 2007, 18(10): 2251-2255.

Yin Y F, Cai Z C. Organic carbon decomposition rate in different soil types. Chinese Journal of Applied Ecology, 2007, 18(10): 2251-2255. (in Chinese)

[25] Huang C C, Chen Z S. Carbon and nitrogen mineralization of sewage sludge compost in soils with a different initial pH. Soil Science and Plant Nutrition, 2009, 55(5): 715-724.

[26] Setia R, Setia D, Marschner P. Short-term carbon mineralization in saline-sodic soils. Biology and Fertility of Soils, 2012, 48: 475-479.

[27] Jhaa P, Garg N, Lakariaa B L, Biswas A K, Rao A S. Soil and residue carbon mineralization as affected by soil aggregate size. Soil & Tillage Research, 2012, 121: 57-62.