Characteristics of runoff and dissolved organic carbon loss in slope farmland with contour ridges during maize growth stages
WU Wanhua, HE Shuqin, GONG Yuanbo, ZHENG Zicheng
1. College of Forestry, Sichuan Agricultural University, 611130, Chengdu, China; 2. Key Laboratory of Soil & Water Conservation and Desertification Combating, Sichuan Agricultural University, 611130, Chengdu, China; 3. College of Resource Science, Sichuan Agricultural University, 611130, Chengdu, China
Abstract：[Background] The purple soil region is one of the typical areas suffering serious soil erosion in Southwest China. At the same time, the growth periods of the maize coincide with the timing of rainstorms. Serious soil erosion would surely result in the loss of runoff and organic carbon. Our aims are to investigate the characteristics of the loss and the migration of dissolved organic carbon (DOC) during the growth period of maize in the slope farmland of purple soil, providing a scientific basis for the effective prevention and control of organic carbon loss during the maize planting.[Methods] Surface runoff, interflow and its loss characteristics of dissolved organic carbon of the whole growth period of maize were studied by the combination methods of field runoff plots and artificial rainfall simulation in slope farmland of purple soil areas. Contour ridge is designed according to local agricultural customs. A total of 12 rainfall simulation experiments are conducted in two 1 m by 2 m boxes under three rainfall intensities (1.0, 1.5, and 2.0 mm/min) on a typical slope gradient of 15°.[Results]The surface runoff was obviously affected by rainfall redistribution, and surface runoff presented the maximum in seedling stage and the minimum in tasseling stage. However, the interflow was less affected by rainfall intensity and rainfall redistribution. Although the DOC mass concentration of surface runoff showed a decreasing trend gradually, and the initial value of the DOC mass concentration was relatively higher under rainfall intensity of 2.0 mm/min. The interflow DOC mass concentration showed a trend of rising first and then decreasing and it was most significant under rainfall intensity of 1.0 mm/min. In the first 30 minutes of the runoff generation, the DOC migration load of surface runoff displayed an order of seedling stage > mature stage > jointing stage > tasseling stage, and it was affected greatly by rainfall intensity. However, the DOC migration load of interflow displayed an order of seedling stage > jointing stage > tasseling stage > mature stage, and the effect of rainfall intensity on the transfer load of the interflow DOC was not obvious. During the same growth period, the mass concentration of interflow DOC was higher than that of the surface runoff, besides, but interflow occurrence was later than that of surface runoff. The interflow DOC migration load was 1.35 times of the surface runoff DOC.[Conclusions] The growth period of maize had an obvious influence on surface runoff. Interflow was the main mode of the DOC migration in slope farmland of purple soil. The variation of mass concentration of DOC depended on the time of runoff generation and the change of maize growth stage.
武万华1,2, 何淑勤1,2, 宫渊波1,2, 郑子成3. 玉米季横垄坡面径流及可溶性有机碳流失特征[J]. 中国水土保持科学, 2017, 15(5): 31-38.
WU Wanhua, HE Shuqin, GONG Yuanbo, ZHENG Zicheng. Characteristics of runoff and dissolved organic carbon loss in slope farmland with contour ridges during maize growth stages. SSWC, 2017, 15(5): 31-38.
FROBERG M, BERGGREN D K, BERGKVIST B, et al. Concentration and fluxes of dissolved organic carbon (DOC) in three Norway spruce stands along a climatic gradient in Sweden[J]. Biogeochemistry, 2006, 77(1):1.
[2]
杨玉盛, 郭剑芬, 陈光水, 等. 森林生态系统DOM的来源特性及流动[J]. 生态学报, 2003, 23(3):5478. YANG Yusheng, GUO Jianfen, CHEN Guangshui, et al. Source characteristics and flow of DOM in forest ecosystem[J]. Acta Ecologica Sinica, 2003, 23(3):547.
[3]
LAL R. Soil erosion and the global carbon budget[J]. Environment International, 2003, 29(4):437.
[4]
FLORES-CESPEDES F, GONZALES-PRADAS E, FERNANDEZ-PEREZ M, et al. Effects of dissolved organic carbon on sorption and mobility of imidacloprid in soil[J]. Journal of Environmental Quality, 2002, 31(3):880.
[5]
LI K, XING B, TORELLO W A. Effect of organic fertilizers derived dissolved organic matter on pesticide sorption and leaching[J]. Environmental Pollution, 2005, 134(2):187.
[6]
EVANS C D, MONTEITH D T, COOPER D M. Long-term increases in surface water dissolved organic carbon:observations, possible causes and environmental impacts[J]. Environmental Pollution, 2005,137(1):55.
[7]
INAMDAR S P, LEARY N, MITCHELL M J, et al. The impact of storm events on solute exports from a glaciated forested watershed in western New York, USA[J]. Hydrological Processes, 2006, 20(16):3423.
[8]
EIMERS M C, BUTTLE J, WATMOUGH S A. Influence of seasonal changes in runoff and extreme events on dissolved organic carbon trends in wetland-and upland-draining streams[J]. Canadian Journal of Fisheries and Aquatic Sciences, 2008, 65(5):796.
[9]
赵满兴, 周建斌, 陈竹君, 等. 有机肥中可溶性有机碳氮含量及其特性[J]. 生态学报, 2007, 27(1):397. ZHAO Manxing, ZHOU Jianbin, CHEN Zhujun, et al. Contents and characteristics of dissolved organic carbon and nitrogen in organic manure[J]. Acta Ecologica Sinica, 2007, 27(1):397.
[10]
ALEX T Chowa, KENNETH K Tanjia, GAO Suduan, et al. Temperature, water content and wet-dry cycle effects on DOC production and carbon mineralization in agricultural peat soils[J]. Soil Biology and Biochemistry, 2006, 38(3):477.
[11]
郑子成, 李廷轩, 张锡洲, 等. 模拟降雨条件下玉米植株对降雨再分配的作用[J]. 水土保持研究, 2012, 19(4):72. ZHENG Zicheng, LI Tingxuan, ZHANG Xizhou, et al. Effects of maize plants on rainfall redistribution under simulated rainfall conditions[J]. Research of Soil and Water Conservation, 2012, 19(4):72.
[12]
马波, 吴发启, 陈宇, 等. 玉米不同生育期茎秆流特征及其模型构建[J]. 农业工程学报, 2011, 27(1):118. MA Bo, WU Faqi, CHEN Yu, et al. Characteristics and modeling of stem flow in different growth stages of maize[J]. Transactions of the Chinese Society of Agricultural Engineering, 2011, 27(1):1183.
[13]
林超文, 庞良玉, 陈一兵, 等. 四川盆地紫色土N,P损失载体及其影响因子[J]. 水土保持学报, 2008, 22(2):20. LIN Chaowen, PANG Liangyu, CHEN Yibing, et al. N and P loss carriers and their influencing factors in purple soil of Sichuan Basin[J]. Journal of Soil and Water Conservation, 2008, 22(2):20.
[14]
花可可, 朱波, 王小国. 紫色土坡耕地可溶性有机碳径流迁移特征[J]. 农业工程学报, 2013, 29(5):81. HUA Keke, ZHU Bo, WANG Xiaoguo. Characteristics of runoff and migration of dissolved organic carbon in purple sloping land[J]. Transactions of the Chinese Society of Agricultural Engineering, 2013, 29(5):81.
[15]
何晓玲, 郑子成, 李廷轩. 玉米种植下紫色坡耕地径流中磷素流失特征研究[J]. 农业环境科学学报, 2012, 31(12):2441. HE Xiaoling, ZHENG Zicheng, LI Tingxuan. Study the characteristics of phosphorus loss in runoff of purple sloping farmland under maize cultivation[J]. Journal of Agro-Environment Science, 2012, 31(12):2441.
[16]
汪涛, 朱波, 罗专溪, 等. 紫色土坡耕地硝酸盐流失过程与特征研究[J]. 土壤学报, 2010, 47(5):963. WANG Tao, ZHU Bo, LUO Zhuanxi, et al. Study on the process and characteristics of nitrate loss in purple sloping land[J]. Acta Pedologica Sinica, 2010, 47(5):963.
[17]
KALBITZ K, SOLINGER S, PARK J H. Controls on the dynamics of dissolved organic matter in soils:a review[J]. Soil Science, 2000, 165(4):277.
[18]
KAISER K, KAUPENJOHANN M, ZECH W. Sorption of dissolved organic carbon in soils:effects of soil sample storage, soil-to-solution ratio, and temperature[J]. Geoderma, 2001, 99(3/4):317.
[19]
喻艳红, 张桃林, 李清曼, 等. 温度和水土比对红壤吸附低分子量有机酸的影响[J]. 土壤, 2011, 43(1):50. YU Yanhong, ZHANG Taolin, LI Qingma, et al. Effects of temperature and soil water ratio on adsorption of low molecular weight organic acids in red soil[J]. Soils, 2011, 43(1):50.
[20]
WANG Guoqiang, WU Binbin, ZHANG Lei, et al. Role of soil erodibility in affecting available nitrogen and phosphorus losses under simulated rainfall[J]. Journal of Hydrology, 2014, 514:180.
[21]
JIA Haiyan, LEI Alin, LEI Junshan, et al. Effects of hydrological processes on nitrogen loss in purple soil[J]. Agriculture Water Management, 2007, 89:89.
[22]
ZHU Bo, WANG Tao, KUANG Fuhong, et al. Measurements of nitrate leaching from a hillslope cropland in the Central Sichuan Basin, China[J]. Soil Science Society of America Journal, 2009, 73(4):1419.
2017, Vol. 15 
