Effects of Biochar Application on the Losses of Nitrogen and Phosphorus in Surface Water of Paddy Field

doi:10.3969/j.issn.1000-6362.2017.03.004

Abstract

Abstract: Applied high rates of nitrogen (N) fertilizer in rice production may result in lower N use efficiency in a paddy rice field of the Yellow River irrigation region, Ningxia. To reduce N and phosphorus (P) leaching and improve fertilizer use efficiency are important for sustainable and water quality. Thus, a field plot experiment was conducted to study the effect of exogenous biochar application on the loss risk of N and P and soil quality in a paddy field. Four biochar rates, i.e., 0, 4500, 9000, and 13500kg·ha-1 with optimum nitrogen rate (240kg·ha-1) were chosen. From May to October 2014, we determined the contents of NH4+-N, NO3--N, total N (TN) and total P (TP) in the surface water of paddy field during the whole rice growth period. The results showed that biochar amendment decreased the contents of both TN and NO3--N but increased NH4+-N content in the surface water. The contents of TN and NH4+-N reached the peak on the following day of the first top dressing and the maximum values were 34.86 and 8.28mg·L-1 respectively. The content of NO3--N reached the peak on the following day of the second top dressing and the maximum value was 3.31mg·L-1. Then TN leveled off after 10 days, but the NH4+-N and NO3--N contents approached a relatively stable level after a week. There was no significant difference in TP content in the surface water between the biochar addition and the control treatments. The content of TP peaked 3 days after fertilization and decreased rapidly afterwards, then leveled off after another 6-7 days. On the other hand, biochar amendment decreased TN leaching by 8.03%-13.36% relative to control, but the high-level biochar amendments (13500kg·ha-1) significantly (P＜0.05) increased the contents of TN and soil organic matter by 41.2% and 27.5% respectively compared with the control. There was no significant difference in TP and available P contents in soil between the biochar addition treatments and the control. Our study has revealed that biochar could positively reduce N leaching in the rice fields, while there has no significant effect on P loss.

Key words: Biochar, Surface water of paddy field, Nitrogen, Phosphorus, Soil nutrients

XIAO Jian-nan, ZHANG Ai-ping, LIU Ru-liang, YANG Zheng-li. Effects of Biochar Application on the Losses of Nitrogen and Phosphorus in Surface Water of Paddy Field[J]. Chinese Journal of Agrometeorology, 2017, 38(03): 163-171.

References

[1]Zhu Z L,Chen D L.Nitrogen fertilizer use in China: contributions to food production, impacts on the environment and best management strategies[J].Nutrient Cycling in Agroecosystems,2002,63(2):117-127. [2]穆鑫,吕谋超,温随群,等.宁夏引黄灌区农田退水回灌对土壤盐分影响的试验研究[J].灌溉排水学报,2011,30(1):76-79. Mu X,Lv M C,Wen S Q,et al.Effects of salinity changes upon farmland return flow reusing in Ningxia Yellow River water irrigation district[J].Journal of Irrigation and Drainage, 2011, 30(1):76-79.(in Chinese) [3]陈伟伟,李强坤,胡亚伟,等.青铜峡灌区水稻田三氮变化特征试验研究[J].农业环境科学学报,2010,29(4):790-794. Chen W W,Li Q K,Hu Y W,et al.Experimental research on variation feature of three kinds of nitrogen from paddy field in Qingtongxia irrigation area[J].Journal of Agro-Environment Science,2010,29(4):790-794.(in Chinese) [4]张爱平,刘汝亮,杨世琦,等.基于缓释肥的侧条施肥技术对水稻产量和氮素流失的影响[J].农业环境科学学报,2012, 31(3):555-562. Zhang A P,Liu R L,Yang S Q,et al.Effect of side bar fertilization technology based on slow-release fertilizer on rice yield and nitrogen losses[J].Journal of Agro-Environment Science,2012,31(3):555-562.(in Chinese) [5]张晴雯,张惠,易军,等.青铜峡灌区水稻田化肥氮去向研究[J].环境科学学报,2010,30(8):1707-1714. Zhang Q W,Zhang H,Yi J,et al.The fate of fertilizer-derived nitrogen in a rice field in the Qingtongxia irrigation area[J].Acta Scientiae Circumstantiae, 2010,30(8):1707- 1714. (in Chinese) [6]易军,张晴雯,王明,等.宁夏黄灌区灌淤土硝态氮运移规律研究[J].农业环境科学学报,2011,30(10):2046-2053. Yi J,Zhang Q W,Wang M,et al.Nitrate-nitrogen transport in an anthropogenic-alluvial soil of Ningxia irrigation area, China[J].Journal of Agro-Environment Science,2011, 30(10): 2046-2053.(in Chinese) [7]Lehmenn J.Bio-energy in the black[J].Frontiers in Ecology & the Environment,2007,5(7):381-387. [8]Amminuddin H.Effects of controlled release urea on the yield and nitrogen nutrition of flooded rice[J].Communications in Soil Science and Plant Analysis,2010,41(7):811-819. [9]周志红,李心清,邢英,等.生物炭对土壤氮素淋失的抑制作用[J].地球与环境,2011,39(2):278-284. Zhou Z H,Li X Q,Xing Y,et al.Effect of biochar amendment on nitrogen leaching in soil[J].Earth and Environment, 2011, 39(2):278-284.(in Chinese) [10]Singh B P,Hatton B J,Balwant S,et al.Influence of biochars on nitrous oxide emission and nitrogen leaching from two contrasting soils[J].Journal of Environmental Quality, 2010, 39(4):1224-35. [11]王吉智.宁夏引黄灌区的灌淤土[J].土壤学报, 1984, (4):434-437. Wang J Z.Irrigating warped soil in irrigation area of the Yellow River in Ningxia Autonomous Region[J]. Acta Pedologica Sinica,1984(4):434-437.(in Chinese) [12]马玉兰.灌淤土研究新进展[J].土壤通报, 1996,27(4): 155-158. Ma Y L.Recent advances in research of irrigating warped soil[J].Chinese Journal of Soil Science, 1996, 27(4): 155-158.(in Chinese) [13]鲍士旦.土壤农化分析[M].北京:中国农业出版社,1999. Bao S D.Soil agro-chemistrical analysis[M].Beijing:China Agriculture Press,1999.(in Chinese) [14]刘汝亮,李友宏,张爱平,等.育秧箱全量施肥对水稻产量和氮素流失的影响[J].应用生态学报,2012,23(7):1853-1860. Liu R L,Li Y H,Zhang A P,et al.Effects of seeding-box total fertilization on rice yield and nitrogen loss[J].Chinese Journal of Applied Ecology,2012,23(7):1853-1860.(in Chinese) [15]刘玉学.生物质炭输入对土壤氮素流失及温室气体排放特性的影响[D].杭州:浙江大学,2011. Liu Y X.Effect of biochar on the characteristic of nitrogen loss and greenhouse gas emission from soil[D]. Hangzhou: Zhejiang University,2011.(in Chinese) [16]Yu H,Xi B,Jiang J,et al.Environmental heterogeneity analysis,assessment of trophic state and source identification in Chaohu Lake,China[J].Environmental Science & Pollution Research International,2011,18(8):1333-1342. [17]张志剑,董亮,朱荫湄.水稻田面水氮素的动态特征、模式表征及排水流失研究[J].环境科学学报,2001,21(4):475-480. Zhang Z J,Dong L,Zhu Y M,et al.The dynamic characteristics and modeling of nitrogen in paddy field sur- face water and nitrogen loss from field drainage[J]. 2001, 21(4):475-480.(in Chinese) [18]苏成国,尹斌,朱兆良,等.农田氮素的气态损失与大气氮湿沉降及其环境效应[J].土壤,2005,37(2):113-120. Su C G,Yin B,Zhu Z L,et al.Gaseous loss of nitrogen from fields and wet deposition of atmospheric nitrogen and their environmental effects[J].Soils,2005,37(2):113-120.(in Chinese) [19]宋勇生,范晓晖,林德薯,等.太湖地区稻田氨挥发及影响因素的研究[J].土壤学报,2004,41(2):265-269. Song Y S,Fan X H,Lin D S,et al.Ammonia volatilation from paddy fields in the Taihu Lake region and its influencing factors[J].Acta Pedologica Sinica,2004,41(2):265-269.(in Chinese) [20]张爱平.宁夏黄灌区稻田退水氮磷污染特征研究[D].北京:中国农业科学院,2009. Zhang A P.Study on the characteristics of nitrogen and phosphorus pollution in the return flow of rice paddy in Nigxia Irrigation Region[D].Beijing:Chinese Academy of Agricultural Sciences,2009.(in Chinese) [21]陈欣,宇万太,沈善敏.磷肥低量施用制度下土壤磷库的发展变化Ⅱ:土壤有效磷及土壤无机磷组成[J].土壤学报, 1997,(1):81-88. Chen Y,Yu W T,Shen S M.Changes of soil phosphorus pool under low-input phosphorus fertilization systemⅡ:soil available phosphorus and the composition of soil inorganic phosphorus[J].Acta Pedologica Sinica,1997,(1):81-88.(in Chinese) [22]Sharpley A N,Daniel T C,Sims J T,et al.Determining environmentally sound soil phosphorus levels[J].Journal of Soil & Water Conservation,1996,51(2):160-166. [23]郑小龙,吴家森,陈裴裴,等.不同施肥与生物质炭配施对水稻田面水氮磷流失及产量的影响[J].水土保持学报, 2013, 27(4):39-43. Zheng X L,Wu J S,Chen P P,et al.Effects of reducing nitrogen and biomass carbon fertilization on loss of nitrogen and phosphorus in surface water of paddy field and grain production[J].Journal of Soil and Water Conservation,2013,27(4):39-43.(in Chinese) [24]Warnock D D L J,Kuyper T W,Rillig M C.Mycorrhizal responses to biochar in soil-concepts and mechanisms[J]. Plant & Soil,2007,300(1-2):9-20. [25]Busscher W J,Novak J M,Evans D E,et al.Influence of pecan biochar on physical properties of a Norfolk loamy sand[J].Soil Science,2010,175(1):10-14. [26]房彬,李心清,赵斌,等.生物炭对旱作农田土壤理化性质及作物产量的影响[J].生态环境学报,2014(8):1292-1297. Fang B,Li X Q,Zhao B,et al.Influence of biochar on soil physical and chemical properties and crop yields in rainfed field[J].Ecology and Environmental Sciences, 2014(8): 1292-1297.(in Chinese) [27]Laird D A,Fleming P,Davis D D,et al.Impact of biochar amendments on the quality of a typical Midwestern agricultural soil[J].Geoderma,2010,158(3-4):443-449. [28]Bruun S,Elzahery T,Jensen L.Carbon sequestration with biochar-stability and effect on decomposition of soil organic matter[A].IOP conference series:earth and environmental science[C].IOP, 2009. [29]Liang B,Lehmann J,Sohi S P,et al.Black carbon affects the cycling of non-black carbon in soil[J].Organic Geochem- istry,2010,41(2):206-213. [30]Birk J J,Steiner C,Teixiera W C,et al.Microbial response to charcoal amendments and fertilization of a highly weathered tropical soil[M].Springer Netherlands,2009:309-324.