Soil total nitrogen and alkali-hydrolyzed nitrogen based on a long-term experiment with various tillage systems were studied in a purple paddy soil at the farm of Southwest University, Chongqing, China. The experiment included five tillage treatments: conventional tillage with rice only system (DP), conventional tillage with rotation of rice and rape system (SH), no-till and ridge culture with rotation of rice and rape system (LM), no-till and plain culture with rotation of rice and rape system (XM), and tillage and ridge culture with rotation of rice and rape system (LF). The content of soil total nitrogen in the 0-60 cm soil layers under different tillage systems was LM (1.53 g/kg)>DP (1.50 g/kg)>XM (1.32 g/kg)>LF (1.31 g/kg)>SH (1.16 g/kg), the content of alkali-hydrolyzed nitrogen was DP (111.48 mg/kg)>LM (105.20 mg/kg)>SH (101.97 mg/kg)>LF (97.26 mg/kg)>XM (95.19 mg/kg). Long-term LM treatment significantly increased soil total nitrogen content. The C/N ratio was LM (14.94)>XM (10.49)>SH (10.38)>LF (10.20)>DP (10.18) which indicated that an easier nutrients release to soil during the process of organic matter decomposition under no-till systems.
ZHU Tao, HAO Qing-ju, JIANG Chang-sheng, YUAN Xue
. Tillage Impacts on Soil Total Nitrogen and Alkali-hydrolyzed Nitrogen of the Purple Paddy Soil in Southeast China[J]. SCIENTIA GEOGRAPHICA SINICA, 2011
, 31(6)
: 753
-757
.
DOI: 10.13249/j.cnki.sgs.2011.06.753
[1] 李菊梅,王朝辉,李生秀.有机质、全氮和可矿化氮在反映土壤供氮能力方面的意义[J].土壤学报,2003,40(2):232~238
[2] Das A K, Boral L,Tripathi R S,et al.Nitrogen mineralization and mineral biomass-N in a subtropical humid forest of Meghalaya,India[J].Soil Biology and Biochemistry,1997,29:1609-1612.
[3] Bai J H,Deng W,Wang Q G,et al.Spatial distribution of inorganic nitrogen contents of marsh soils in a river floodplain with different flood frequencies from soil-defrozen period[J]. Environmental Monitoring and Assessment, 2007,134(1-3):421-428.
[4] 何毓蓉,徐祥明,吴晓军.成渝经济区的耕地土壤质量特点及保护对策[J].地理科学,2009,29(3):375~380.
[5] 谢德体,陈绍兰.水田自然免耕的理论与技术[M].重庆:重庆出版社,2002.
[6] 唐晓红,邵景安,黄雪夏,等.垄作免耕下紫色水稻土有机碳的分布特征[J].土壤学报,2007,44(2): 235~243.
[7] 鲁如坤.土壤农业化学分析方法[M].北京:中国农业科技出版社,1999.
[8] Ellert B H,Bettany J R.Calculation of organic matter and nutrients stored in soils under contrasting management regimes[J].Canadian Journal of Soil Science,1995,75:529-538.
[9] 孙志高,刘景双,于君宝,等.15N示踪技术在湿地氮素生物地球化学过程研究中的应用进展[J].地理科学,2005,25(6):762~768.
[10] 白军红,邓 伟,欧阳华,等吉林向海沼泽湿地土壤氮素的剖面分布[J].湖泊科学,2004,16(4):377~380.
[11] Bai J H,Deng W,Wang Q G,et al.Spatial distribution characteristics of organic matter and total nitrogen of marsh soils in river marginal wetlands[J].Geoderma,2005,124(1-2):181-192.
[12] 白军红,丁秋祎,高海峰,等.向海湿地不同植被群落下土壤氮素的分布特征[J].地理科学,2009,29(3):381~384.
[13] 杨智杰,崔纪超,谢锦升,等.中亚热带山区土地利用变化对土壤性质的影响[J].地理科学,2010,30(3):475~480.
[14] 孙瑞莲,朱鲁生,赵秉强,等.长期施肥对土壤微生物的影响及其在养分调控中的作用[J].应用生态学报,2004,15(10):1907~1910.
[15] 张智锰,戴良香,张电学,等.冬小麦-夏玉米轮作周期内碱解氮、硝态氮时空变化及施氮安全值的研究[J].土壤通报,2004,35(1):38~42.
[16] 中国科学院南京土壤研究所.土壤理化分析[M].上海:上海科技出版社,1978:62~78.
[17] 王艳杰,付 桦.雾灵山地区土壤有机质全氮及碱解氮的关系[J].农业环境科学学报(增刊),2005,24:85~90.
[18] 梁爱珍,张晓平,杨学明,等.耕作方式对耕层黑土有机碳库储量的短期影响[J].中国农业科学,2006,39(6):1287~1293.
[19] PartonW J,Stewart J W B,Cole C V.Dynamics of C,N,P and S in grassland soils amodel[J].Biogeochemistry,1988,5:109-131.
[20] PrescottC E,Chappell N H,Vesterdal L.Nitrogen turnover in forest floors of coastalDouglas-firat sites differing in soil nitrogen capital[J].Ecology,2000,81:1878~1886.
[21] 李阳兵,高 明,邵景安,等.岩溶山区不同植被群落土壤生态系统特性研究[J].地理科学,2005,25(5):606~613.
[22] 窦晶鑫,刘景双,王 洋,等.三江平原草甸湿地土壤有机碳矿化对C/N的响应[J].地理科学,2009,29(5):773~778.
[23] Bai J H,Ouyang H,Deng W,et al.Spatial distribution characteristics of organic matter and total nitrogen of marsh soils in river marginal wetlands[J].Geoderma,2005,124(1-2):181-192.
