[1] [1] Li Qiao, Sun Junwei, Li Haixia. Effect of potassium limitation on chlorophyll fluorescence parameters in rice leaves［J］. Journal of China Jiliang University, 2006, 17(1): 79-83.

[2] [2] Sun Junwei, Weng Xiaoyan, Li Qiao, et al.. Effect of potassium-deficiency on photosynthesis and energy dissipation in different rice cultivars［J］. Plant Nutrition and Fertilizer Science, 2007, 13(4): 577-584.

[3] [3] Liao Yulin, Zheng Shengxian, Huang Jianyu, et al.. Effect of application of K fertilizer on potassium efficiency and soil K status in deficit K of paddy soil［J］. Chinese Agricultural Science Bulletin, 2008, 24(2): 255-260.

[4] [4] Zhao Qingling, Li Qingcai, Pu Jun, et al.. Simultaneous determination of 31 elements in soil samples by inductively coupled plasma-atomic emission spectrometry［J］. Rock and Mineral Analysis, 2010, 29(4): 455-457.

[5] [5] David A Cremers, Leon J Radziemski. Handbook of Laser-Induced Breakdown Spectroscopy[M]. Hoboken: John Wiley & Sons Inc, 2006.

[6] [6] Russell S Harmon, Frank C De Lucia, Andrzej W Miziolek, et al.. Laser-induced breakdown spectroscopy(LIBS)——an emerging field-portable sensor technology for real-time, in-situ geochemical and environmental analysis［J］. Geochemistry: Exploration, Environment, Analysis, 2005, 5(1): 21-28.

[7] [7] S L Lui, Y Godwal, M T Taschuk, et al.. Detection of lead in water using laser-induced breakdown spectroscopy and laser-induced fluorescence［J］. Analytical Chemistry, 2008, 80(6): 1995-2000.

[8] [8] Xu Hongguang, Guan Shicheng, Fu Yuanxia, et al.. Laser induced breakdown spectroscopy of the trace metal element Pb in soil［J］. Chinese J Lasers, 2007, 34(4): 577-581.

[9] [9] Wang Chunlong, Liu Jianguo, Zhao Nanjing, et al.. Enrichment of trace lead in water with graphite and measurement by laser-induced breakdown spectroscopy［J］. Chinese J Lasers, 2011, 38(11): 1115002.

[10] [10] Lu Cuiping, Liu Wenqing, Zhao Nanjing, et al.. Influence of laser energy and repetition rate on characteristic of laser-induced soil plasmas［J］. Chinese J Lasers, 2011, 38(2): 0215002.

[11] [11] T Hussain, M A Gondal, Z H Yamani, et al.. Measurement of nutrients in green house soil with laser induced breakdown spectroscopy［J］. Environ Monit Assess, 2007, 124(1-3): 131-139.

[12] [12] Chen Kai, Lu Jidong. Determination of potassium concentrations in compound fertilizer with laser induced breakdown spectroscopy［J］. High Power Laser and Particle Beams, 2011, 23(2): 293-297.

[13] [13] Lu Weiye, Lu Jidong, Yao Shunchun, et al.. Synchronization detection of nitrogen phosphorus potassium in compound fertilizer with laser induced breakdown spectroscopy［J］. Chinese J Lasers, 2011, 38(10): 1008003.

[14] [14] Dong Daming, Zheng Wengang, Zhao Chunjiang, et al.. Determination of potassium in farmland soil using laser-induced breakdown spectroscopy［J］. Spectroscopy and Spectral Analysis, 2013, 33(3): 785-789.

[15] [15] Wang Jiasheng, Qiao Dongpo, Lu Yunzhang, et al.. Quantitative analysis of laser-induced breakdown spectroscopy in rocks by using intensity normalization method［J］. Chinese J Lasers, 2010, 37(1): 225-230.

[16] [16] Cheri M S, Tavassoli S H. Quantitative analysis of toxic metals lead and cadmium in water jet by laser-induced breakdown spectroscopy［J］. Appl Opt, 2011, 50(9): 1227-1233.